Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Robert Treat wrote: On Tuesday 27 April 2004 15:12, Alvaro Herrera wrote: You know, that's kind of the point of all things related to MySQL. It's better than nothing. PostgreSQL doesn't do things because it's better than nothing. snip (Same as how MySQL guesses the result of a modulo operation, and gets it wrong. They don't care and you can read that on the manual. In Postgres, this is a bug.) Hey Alvaro, are you familiar with worse is better philosphy in software development and how that leads to adoption rates? It basically states that simplicity is the ultimate design goal over correctness, consitency, and completness. Because of this more people are able to quickly adopt a technology, which allows the incorrectness/inconsistency/incompletness to be address by new comers and gradually bring the software up to higher standards. I was reading some blogs the other day that applied this to PHP's adoption rate over Java and .net, but your comment made me think this really applies to my$ql and postgresql as well. check out http://www.sitepoint.com/forums/showpost.php?p=1121502postcount=2 for a bit more. Interesting analysis. -- Bruce Momjian| http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup.| Newtown Square, Pennsylvania 19073 ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Tuesday 27 April 2004 15:12, Alvaro Herrera wrote:
You know, that's kind of the point of all things related to MySQL.
It's better than nothing. PostgreSQL doesn't do things because it's
better than nothing. snip
(Same as how MySQL guesses the result of a modulo operation, and gets it
wrong. They don't care and you can read that on the manual. In
Postgres, this is a bug.)
Hey Alvaro,
are you familiar with worse is better philosphy in software development and
how that leads to adoption rates? It basically states that simplicity is the
ultimate design goal over correctness, consitency, and completness. Because
of this more people are able to quickly adopt a technology, which allows the
incorrectness/inconsistency/incompletness to be address by new comers and
gradually bring the software up to higher standards. I was reading some
blogs the other day that applied this to PHP's adoption rate over Java and
.net, but your comment made me think this really applies to my$ql and
postgresql as well. check out
http://www.sitepoint.com/forums/showpost.php?p=1121502postcount=2 for a bit
more.
Robert Treat
--
Build A Brighter Lamp :: Linux Apache {middleware} PostgreSQL
---(end of broadcast)---
TIP 7: don't forget to increase your free space map settings
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Tue, May 04, 2004 at 03:06:53PM -0400, Robert Treat wrote: On Tuesday 27 April 2004 15:12, Alvaro Herrera wrote: You know, that's kind of the point of all things related to MySQL. It's better than nothing. PostgreSQL doesn't do things because it's better than nothing. snip (Same as how MySQL guesses the result of a modulo operation, and gets it wrong. They don't care and you can read that on the manual. In Postgres, this is a bug.) Hey Alvaro, are you familiar with worse is better philosphy in software development and how that leads to adoption rates? Yeah, I've read about it. I'm not sure which side of the do I sit on, though. The wikipedia entry may be a good read: http://en.wikipedia.org/wiki/Worse_is_better Note that it puts correctness and consistency after simplicity, but this not means that they are completely put away. I think SQL (as in SQL standard) is not modelled after this idea: SQL tries to be complete rather than simple. I may be wrong though. Certainly MySQL does away with completeness and tries to achieve simplicity, while the opposite could be said of Postgres. Fortunately, Postgres has apparently caught up with developer mass, so it may yet be able to win against MySQL ... -- Alvaro Herrera (alvherre[a]dcc.uchile.cl) Linux transformó mi computadora, de una `máquina para hacer cosas', en un aparato realmente entretenido, sobre el cual cada día aprendo algo nuevo (Jaime Salinas) ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Robert Treat [EMAIL PROTECTED] writes: On Tuesday 27 April 2004 15:12, Alvaro Herrera wrote: You know, that's kind of the point of all things related to MySQL. It's better than nothing. PostgreSQL doesn't do things because it's better than nothing. snip (Same as how MySQL guesses the result of a modulo operation, and gets it wrong. They don't care and you can read that on the manual. In Postgres, this is a bug.) Hey Alvaro, are you familiar with worse is better philosphy in software development and how that leads to adoption rates? It basically states that simplicity is the ultimate design goal over correctness, consitency, and completness. Because of this more people are able to quickly adopt a technology, which allows the incorrectness/inconsistency/incompletness to be address by new comers and gradually bring the software up to higher standards. I was reading some blogs the other day that applied this to PHP's adoption rate over Java and .net, but your comment made me think this really applies to my$ql and postgresql as well. check out http://www.sitepoint.com/forums/showpost.php?p=1121502postcount=2 for a bit more. The problem with the Worse is Better philosophy is that it almost totally overlooks price, which is arguably the most important factor in deciding which technologies get adopted. The real trick is being good enough at the lowest price. When MySQL became the de-facto web database (back in the Postgres95 and Postgres 6.X days) PostgreSQL simply wasn't good enough for most sites. PostgreSQL, in those days, was slow, buggy, and decidedly non-standard (anyone else remember PostQUEL). On the plus side I personally don't think that Free Software databases have really hit their stride yet, and I believe that when they do PostgreSQL is going to be front and center. MySQL is a pretty handy datastore, but PostgreSQL is a far more useful tool for creating complex applications. Jason ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Hi! Tim Conrad wrote: I was researching an article I wrote about a comparison between Postgres and MySQL recently (If you want, you can read the article at http://www.devx.com/dbzone/Article/20743/). I noticed some clear differences between the mysql.com website and the Postgres website. Sorry, couldn't resist: may I suggest doing the research *before* writing an article, not *after*? My favourite part of it is: MySQL uses traditional row-level locking. PostgreSQL uses something called Multi Version Concurrency Control (MVCC) by default. MVCC is a little different from row-level locking in that transactions on the database are performed on a snapshot of the data and then serialized. New versions of PostgreSQL support standard row-level locking as an option, but MVCC is the preferred method. 2) There doesn't seem to be a clear roadmap on Postgres features. When certian things are expected. There's the TODO list that Bruce maintains, but it only outlines 'near' fixes. MySQL has a nice listing of what to expect in certian future versions. I know it's not a perfect list, but it'd be nice to know when full blown replication will be included in PostgreSQL as an example. MySQL's roadmap is complete bullshit. Subselects were first promised in 4.0, which was not that far away [1] back in 1998! Well, they are in 4.1, which is still alpha in 2004. Of course, some gullible people actually believe this and compare [2] the existing and working implementations with vaporware (MySQL 5.1, anyone?). On those same lines, there doesn't seem to be anything about the improvements in the minor versions. It seems that in every release (i.e. 7.2,7.3,7.4) there are pretty significant changes, but finding a place that outlines these changes is somewhat difficult. Have you tried looking in the release notes [3]? [1] http://www.geocrawler.com/archives/3/194/1998/8/0/1061364/ [2] http://www.devx.com/dbzone/Article/20743/1763?supportItem=1 [3] http://www.postgresql.org/docs/7.4/interactive/release.html ---(end of broadcast)--- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Alexey Borzov wrote: I realize this. I also realize that having a nicely defined roadmap would give Postgres a hands up in this category. A hands up in *what* category? In bragging? In telling your boss, I think we should use Postgresql. It's likely he's not stupid, and it's reasonable for him to say since I'm tying my own success to this software, I want to have some indication as to where this software is going to go. Something like Josh Berkus' table of features would be very nice. (I've worked with sales teams at my various former employers, and the best things you can provide them are documents (feature descriptions, competitive analyses, white papers, etc) that your customer contact can use as the basis for his own justification to buy your product. All of this can be summarized as make it easy for people to help you.) Cheers, Mark -- Mark Harrison Pixar Animation Studios ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Hi! Tim Conrad wrote: My favourite part of it is: MySQL uses traditional row-level locking. PostgreSQL uses something called Multi Version Concurrency Control (MVCC) by default. MVCC is a little different from row-level locking in that transactions on the database are performed on a snapshot of the data and then serialized. New versions of PostgreSQL support standard row-level locking as an option, but MVCC is the preferred method. Nice that you point out that incorrectly stated something. Even nicer that you don't tell me what the correct answer would be. Unfortunanatly, that's the best I could come up with with doing research with the documentation I could find on the subject. MVCC does a lot more than can be easily contained in a sentance. The problem is that in MySQL 1) MyISAM does table-level locking; 2) BDB does row-level locking; 3) InnoDB does MVCC (mostly) like PostgreSQL. PostgreSQL does support row-level locking (SELECT ... FOR UPDATE), table-level locking (LOCK TABLE ...), though this does not *replace* MVCC, as one may understand from the quotation. MySQL's roadmap is complete bullshit. Subselects were first promised in 4.0, which was not that far away [1] back in 1998! Well, they are in 4.1, which is still alpha in 2004. I realize this. I also realize that having a nicely defined roadmap would give Postgres a hands up in this category. A hands up in *what* category? In bragging? Should PostgreSQL developers write something along the lines of PostgreSQL 9i (available Really Soon Now) will also be able to make coffee? Well, as you know about coffee now, why don't you add make coffee to your comparison table, with empty space in MySQL's and commercial DBMSs' columns and in 9i in PostgreSQL's one? ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Dear Tim, These are execellent proposals. My only remark would be to build a step-by-step approach. In a first stage, we could set-up a minimal web page for the Win32 port: - PostgreSQL Win32 installer (possibly translated), - translation of the web page in 40 languages, - step-by-step installation under Win32 (screenshots), - links (NLS project, documentation), ... advertise (example: http://www.pgadmin.org/pgadmin3/advocacy.php) and start monitoring downloads. With PostgreSQL Win32 version and looking at pgAdmin III statistics, reaching one million downloads every month seems a reasonable target. PostgreSQL is such a wonderful community project that there is no need to build complex marketing strategies to reach impressive goals. In a second stage, we can start building a rich web site (as you proposed) and make it live on the long run. Best regards, Jean-Michel I've been sort-of reading this thread off and on, so this may contain duplicate suggestions. I was researching an article I wrote about a comparison between Postgres and MySQL recently (If you want, you can read the article at http://www.devx.com/dbzone/Article/20743/). I noticed some clear differences between the mysql.com website and the Postgres website. 1) Since MySQL AB supports and trains for MySQL, there's loads of training information available on their website. On the other hand, I had a hard time finding training information for Postgres in general. Same goes for support. It's easier to find, but it's still somewhat convoluted, IMO. 2) There doesn't seem to be a clear roadmap on Postgres features. When certian things are expected. There's the TODO list that Bruce maintains, but it only outlines 'near' fixes. MySQL has a nice listing of what to expect in certian future versions. I know it's not a perfect list, but it'd be nice to know when full blown replication will be included in PostgreSQL as an example. On those same lines, there doesn't seem to be anything about the improvements in the minor versions. It seems that in every release (i.e. 7.2,7.3,7.4) there are pretty significant changes, but finding a place that outlines these changes is somewhat difficult. While being somewhat nit-picky on this, it'd also be helpful if someone wasn't completely database literate could understand some of the changes. Who needs transactions, anyways? :) 3) There's the issues of 'advanced database features' in general. Many MySQL applications perform much of their logic in the application level, instead of the database level. They do this because there aren't things like triggers or stored procedures in MySQL. As the saying goes, 'if mohammad won't go to the mountain, bring the mountian to mohammad'. Why not do some simple explainations as to why these things are good, and what they do, and how to use them in real context? 4) As other peole have noted, there's no windows build readily available for Postgres. There may be, but it's difficult to find. If someone's used to running, say, Oracle, and all they have is a windows machine to test something out on, MySQL has compiled binaries ready to go. 5) I believe that this was noted as well somewhere along the line - the other tools, like pgadmin III aren't readily available either. They're excellent tools, and they should be quick to find on the postgres website. 6) Bug tracking. I haven't really looked into how MySQL handles this, but when learning about Postgres, I discovered that the whole development model seemed kind of 'closed', and people on the mailing lists would find bugs repeatedly. Something like Bugzilla would be very helpful in this respect. I've been kind of out of the loop for the past 6 months in this area, so it may have changed since then. 7) The two Postgres books are available online for anyone to read and download. They're there, but, to me, you have to notice them on the sidebar to go to them. They're extremely helpful, and they should be pointed out more. Most of these suggestions aren't really anything to do with the database itself. It's simply a re-organization of some of the information that's already available. As others have mentioned, 'it's about the PR'. Just my $.02 worth. Tim ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [HACKERS] What can we learn from MySQL?
On Mon, Apr 26, 2004 at 04:41:35PM -0400, Bruce Momjian wrote: Jean-Michel POURE wrote: [ PGP not available, raw data follows ] -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. Dear Bruce, Taking the example of pgAdmin III, which reached nearly one million hits in December (http://www.pgadmin.org/stats/webalizer), nothing seems impossible for PostgreSQL. Why not create an all-in-one bundle offering PostgreSQL, Apache, Php and PhpPgAdmin for Win32 and ... mass-release it. There is no need to create a complete installer. There could be a single installer executing other installers (like it is sometimes the case in the Win32 world). So that installers remain different. A single web page like http://win.postgresql.org; in 40 languages is enough to mass-release PostgreSQL. With an installer and a single web page, PostgreSQL Win32 could quickly reach one million downloads every month. There is no need to look for complicated strategies. Every month, there can be 10% more downloads. In the end, people will even forget the name of MySQL. That seems like a good idea. Agree. The page should be describe basic PostgreSQL features and step-by-step introduction from download to a first user's SELECT ... FROM. Do you expect translate PostgreSQL-win installer to foreign languages? Karel -- Karel Zak [EMAIL PROTECTED] http://home.zf.jcu.cz/~zakkr/ ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
I've been sort-of reading this thread off and on, so this may contain duplicate suggestions. I was researching an article I wrote about a comparison between Postgres and MySQL recently (If you want, you can read the article at http://www.devx.com/dbzone/Article/20743/). I noticed some clear differences between the mysql.com website and the Postgres website. 1) Since MySQL AB supports and trains for MySQL, there's loads of training information available on their website. On the other hand, I had a hard time finding training information for Postgres in general. Same goes for support. It's easier to find, but it's still somewhat convoluted, IMO. 2) There doesn't seem to be a clear roadmap on Postgres features. When certian things are expected. There's the TODO list that Bruce maintains, but it only outlines 'near' fixes. MySQL has a nice listing of what to expect in certian future versions. I know it's not a perfect list, but it'd be nice to know when full blown replication will be included in PostgreSQL as an example. On those same lines, there doesn't seem to be anything about the improvements in the minor versions. It seems that in every release (i.e. 7.2,7.3,7.4) there are pretty significant changes, but finding a place that outlines these changes is somewhat difficult. While being somewhat nit-picky on this, it'd also be helpful if someone wasn't completely database literate could understand some of the changes. Who needs transactions, anyways? :) 3) There's the issues of 'advanced database features' in general. Many MySQL applications perform much of their logic in the application level, instead of the database level. They do this because there aren't things like triggers or stored procedures in MySQL. As the saying goes, 'if mohammad won't go to the mountain, bring the mountian to mohammad'. Why not do some simple explainations as to why these things are good, and what they do, and how to use them in real context? 4) As other peole have noted, there's no windows build readily available for Postgres. There may be, but it's difficult to find. If someone's used to running, say, Oracle, and all they have is a windows machine to test something out on, MySQL has compiled binaries ready to go. 5) I believe that this was noted as well somewhere along the line - the other tools, like pgadmin III aren't readily available either. They're excellent tools, and they should be quick to find on the postgres website. 6) Bug tracking. I haven't really looked into how MySQL handles this, but when learning about Postgres, I discovered that the whole development model seemed kind of 'closed', and people on the mailing lists would find bugs repeatedly. Something like Bugzilla would be very helpful in this respect. I've been kind of out of the loop for the past 6 months in this area, so it may have changed since then. 7) The two Postgres books are available online for anyone to read and download. They're there, but, to me, you have to notice them on the sidebar to go to them. They're extremely helpful, and they should be pointed out more. Most of these suggestions aren't really anything to do with the database itself. It's simply a re-organization of some of the information that's already available. As others have mentioned, 'it's about the PR'. Just my $.02 worth. Tim ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Tue, 27 Apr 2004, Tim Conrad wrote: 2) There doesn't seem to be a clear roadmap on Postgres features. When certian things are expected. There's the TODO list that Bruce maintains, but it only outlines 'near' fixes. MySQL has a nice listing of what to expect in certian future versions. Not possible for us, since we have no upper management that dictates what features get added, for when ... I know it's not a perfect list, but it'd be nice to know when full blown replication will be included in PostgreSQL as an example. Never, since there is no such thing as a 'full blown replication', since there is no *one* way to do replication ... 3) There's the issues of 'advanced database features' in general. Many MySQL applications perform much of their logic in the application level, instead of the database level. They do this because there aren't things like triggers or stored procedures in MySQL. As the saying goes, 'if mohammad won't go to the mountain, bring the mountian to mohammad'. Why not do some simple explainations as to why these things are good, and what they do, and how to use them in real context? Just a matter of someone writing and submitting it ... how are your writing skills? :) 4) As other peole have noted, there's no windows build readily available for Postgres. There may be, but it's difficult to find. If someone's used to running, say, Oracle, and all they have is a windows machine to test something out on, MySQL has compiled binaries ready to go. there is no native windows currently available, but its being worked on for 7.5 ... after which, a pre-compiled binary becomes automatic ... Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Tue, Apr 27, 2004 at 07:55:08PM +0400, Alexey Borzov wrote: Hi! Tim Conrad wrote: I was researching an article I wrote about a comparison between Postgres and MySQL recently (If you want, you can read the article at http://www.devx.com/dbzone/Article/20743/). I noticed some clear differences between the mysql.com website and the Postgres website. Sorry, couldn't resist: may I suggest doing the research *before* writing an article, not *after*? My favourite part of it is: MySQL uses traditional row-level locking. PostgreSQL uses something called Multi Version Concurrency Control (MVCC) by default. MVCC is a little different from row-level locking in that transactions on the database are performed on a snapshot of the data and then serialized. New versions of PostgreSQL support standard row-level locking as an option, but MVCC is the preferred method. Nice that you point out that incorrectly stated something. Even nicer that you don't tell me what the correct answer would be. Unfortunanatly, that's the best I could come up with with doing research with the documentation I could find on the subject. MVCC does a lot more than can be easily contained in a sentance. 2) There doesn't seem to be a clear roadmap on Postgres features. When certian things are expected. There's the TODO list that Bruce maintains, but it only outlines 'near' fixes. MySQL has a nice listing of what to expect in certian future versions. I know it's not a perfect list, but it'd be nice to know when full blown replication will be included in PostgreSQL as an example. MySQL's roadmap is complete bullshit. Subselects were first promised in 4.0, which was not that far away [1] back in 1998! Well, they are in 4.1, which is still alpha in 2004. I realize this. I also realize that having a nicely defined roadmap would give Postgres a hands up in this category. Of course, some gullible people actually believe this and compare [2] the existing and working implementations with vaporware (MySQL 5.1, anyone?). On those same lines, there doesn't seem to be anything about the improvements in the minor versions. It seems that in every release (i.e. 7.2,7.3,7.4) there are pretty significant changes, but finding a place that outlines these changes is somewhat difficult. Have you tried looking in the release notes [3]? [1] http://www.geocrawler.com/archives/3/194/1998/8/0/1061364/ [2] http://www.devx.com/dbzone/Article/20743/1763?supportItem=1 [3] http://www.postgresql.org/docs/7.4/interactive/release.html I guess I'm an ignorant fool and I don't comprehend many of the items under the release note. I'm also looking for something I can hand my boss and say ' this is why we should use postgres instead of oracle'. Tim ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Tue, Apr 27, 2004 at 12:58:59PM -0300, Marc G. Fournier wrote: On Tue, 27 Apr 2004, Tim Conrad wrote: 2) There doesn't seem to be a clear roadmap on Postgres features. When certian things are expected. There's the TODO list that Bruce maintains, but it only outlines 'near' fixes. MySQL has a nice listing of what to expect in certian future versions. Not possible for us, since we have no upper management that dictates what features get added, for when ... Not entirely true. I've read enough on the lists to see Bruce or others saying 'x feature isn't expected until version y.z'. Heck, to me, something that says 'we're hoping for feature x in version y.z', but it's not an exact science. See the MySQL releases as an example :) I know it's not a perfect list, but it'd be nice to know when full blown replication will be included in PostgreSQL as an example. Never, since there is no such thing as a 'full blown replication', since there is no *one* way to do replication ... It was puretly there for example purposes... 3) There's the issues of 'advanced database features' in general. Many MySQL applications perform much of their logic in the application level, instead of the database level. They do this because there aren't things like triggers or stored procedures in MySQL. As the saying goes, 'if mohammad won't go to the mountain, bring the mountian to mohammad'. Why not do some simple explainations as to why these things are good, and what they do, and how to use them in real context? Just a matter of someone writing and submitting it ... how are your writing skills? :) 4) As other peole have noted, there's no windows build readily available for Postgres. There may be, but it's difficult to find. If someone's used to running, say, Oracle, and all they have is a windows machine to test something out on, MySQL has compiled binaries ready to go. there is no native windows currently available, but its being worked on for 7.5 ... after which, a pre-compiled binary becomes automatic ... Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Tim Conrad wrote: Of course, some gullible people actually believe this and compare [2] the existing and working implementations with vaporware (MySQL 5.1, anyone?). On those same lines, there doesn't seem to be anything about the improvements in the minor versions. It seems that in every release (i.e. 7.2,7.3,7.4) there are pretty significant changes, but finding a place that outlines these changes is somewhat difficult. Have you tried looking in the release notes [3]? [1] http://www.geocrawler.com/archives/3/194/1998/8/0/1061364/ [2] http://www.devx.com/dbzone/Article/20743/1763?supportItem=1 [3] http://www.postgresql.org/docs/7.4/interactive/release.html I guess I'm an ignorant fool and I don't comprehend many of the items under the release note. I'm also looking for something I can hand my boss and say ' this is why we should use postgres instead of oracle'. I think the summary of each release at the top would be OK for that. Actually, your biggest problem is that we don't have a big motivation to _sell_ PostgreSQL to anyone. We are more driven toward solving problems and designing superior software. If it looks like we don't have a polished sales image, that's because we don't stive for that. However, we have had a large number of volunteers over the past few months focus in this area and I hope there will be visible results shortly. -- Bruce Momjian| http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup.| Newtown Square, Pennsylvania 19073 ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Tue, 27 Apr 2004, Tim Conrad wrote: On Tue, Apr 27, 2004 at 12:58:59PM -0300, Marc G. Fournier wrote: On Tue, 27 Apr 2004, Tim Conrad wrote: 2) There doesn't seem to be a clear roadmap on Postgres features. When certian things are expected. There's the TODO list that Bruce maintains, but it only outlines 'near' fixes. MySQL has a nice listing of what to expect in certian future versions. Not possible for us, since we have no upper management that dictates what features get added, for when ... Not entirely true. I've read enough on the lists to see Bruce or others saying 'x feature isn't expected until version y.z'. Heck, to me, something that says 'we're hoping for feature x in version y.z', but it's not an exact science. See the MySQL releases as an example :) Ah, then in that case, look at the TODO list, pull out all items that have a name beside them, and for those, they aren't expected until the next version .. :) Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: [EMAIL PROTECTED] Yahoo!: yscrappy ICQ: 7615664 ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Not entirely true. I've read enough on the lists to see Bruce or others saying 'x feature isn't expected until version y.z'. Heck, to me, something that says 'we're hoping for feature x in version y.z', but it's not an exact science. See the MySQL releases as an example :) Ah, then in that case, look at the TODO list, pull out all items that have a name beside them, and for those, they aren't expected until the next version .. :) But the list is lnng...and my brain is weeekkk. :) Seriously, though. I was looking through the list yesterday trying to figure out something, and it was kind of hard to do.But, more to my point, this stuff is in the MySQL manual, making it easy to find. (Yes. I know what MySQL includes kind of blows, but, it's better than nothing) Tim ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Tue, Apr 27, 2004 at 12:57:46PM -0400, Tim Conrad wrote: Seriously, though. I was looking through the list yesterday trying to figure out something, and it was kind of hard to do.But, more to my point, this stuff is in the MySQL manual, making it easy to find. (Yes. I know what MySQL includes kind of blows, but, it's better than nothing) You know, that's kind of the point of all things related to MySQL. It's better than nothing. PostgreSQL doesn't do things because it's better than nothing. My first patch here was rejected, not because it didn't do anything useful (it did), but because it didn't solve the complete problem. I had to do a lot more work to get it accepted. Similarly, people here don't want to showcase a list of things that will be on the next release, because we _don't know_ what will be on the next release. There are guesses, but guesses are not good enough. (Same as how MySQL guesses the result of a modulo operation, and gets it wrong. They don't care and you can read that on the manual. In Postgres, this is a bug.) In PostgreSQL there are no guesses. There are certainties. And I think this it how it should be for a database server ;-) -- Alvaro Herrera (alvherre[a]dcc.uchile.cl) No hay cielo posible sin hundir nuestras raíces en la profundidad de la tierra(Malucha Pinto) ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Alexey Borzov wrote: Hi! Tim Conrad wrote: My favourite part of it is: MySQL uses traditional row-level locking. PostgreSQL uses something called Multi Version Concurrency Control (MVCC) by default. MVCC is a little different from row-level locking in that transactions on the database are performed on a snapshot of the data and then serialized. New versions of PostgreSQL support standard row-level locking as an option, but MVCC is the preferred method. Nice that you point out that incorrectly stated something. Even nicer that you don't tell me what the correct answer would be. Unfortunanatly, that's the best I could come up with with doing research with the documentation I could find on the subject. MVCC does a lot more than can be easily contained in a sentance. The problem is that in MySQL 1) MyISAM does table-level locking; 2) BDB does row-level locking; 3) InnoDB does MVCC (mostly) like PostgreSQL. PostgreSQL does support row-level locking (SELECT ... FOR UPDATE), table-level locking (LOCK TABLE ...), though this does not *replace* MVCC, as one may understand from the quotation. MySQL's roadmap is complete bullshit. Subselects were first promised in 4.0, which was not that far away [1] back in 1998! Well, they are in 4.1, which is still alpha in 2004. I realize this. I also realize that having a nicely defined roadmap would give Postgres a hands up in this category. A hands up in *what* category? In bragging? Should PostgreSQL developers write something along the lines of PostgreSQL 9i (available Really Soon Now) will also be able to make coffee? Well, as you know about coffee now, why don't you add make coffee to your comparison table, with empty space in MySQL's and commercial DBMSs' columns and in 9i in PostgreSQL's one? Maybe. Just for jest-- If you read the Linux Coffee how-to, write a C module, get the right hardware, etc. Yes, PostgreSQL can make coffee! Of course, this would occur outside any sort of transactional control... Seriously, though... I think that it would be helpful to have a list of features which are under active development (not just the ToDo list which are features which we want to develop). We could also have contact info for leads (or maybe a contact via a web form, etc.) as well as status for that feature. As the lead in a project whose roadmap has changed many times due to paid contracts, I don't really see the value of published roadmaps in general. Best Wishes, Chris Travers ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Bruce Momjian wrote: Peter Eisentraut wrote: Rob wrote: But I think there is room to go further, I don't see any reason why that default install can't include example DBs, One reason is that a useful example database would likely have a download footprint of 10 MB or more. Having this in the default download would not be appreciated by many people. Of course having some example database available at all would be a good idea, but then as a separate download. Here is a little psql script I wrote to populate a table with random data. [snip] Right, I have done the same in the past using random character data (it even had random lengths of strings in the different fields) and in other cases random dictionary words. I was thinking something with more structure, like an customer/product/invoice db with random records that link up to each other properly. I will work on something but am wondering if there are any freely available schemas around (for any system, I know Sybase has a book publishing one that they use in their example queries and is provided with their install, pubs2 I believe) that might be good for use in a more extended sample db. Are there any platforms (outside of MS Windows) that don't include a word list or dictionary these days? ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Bruno Wolff III wrote: On Fri, Apr 23, 2004 at 16:36:57 -0400, [EMAIL PROTECTED] wrote: Ease of use is VERY important, but few suggestions that address this are ever really accepted. Yes, focusing on the functionality is the primary concern, but how you set it up and deploy it is VERY important. You guys need to remember, people are coming from a world where MySQL, Oracle, and MSSQL all have nice setup programs. nice must be in the eye of the beholder. I have used Oracle's installer to install a client and was not amused by it need hundreds of megabtyes to do a client install. I have to agree, I've installed DB2, Sybase, Oracle, Informix, BerkeleyDB, mySQL, postgreSQL and others. IIRC, I believe postgreSQL was the shortest from download to running system (when compiling the OS ones from scratch) and seemed to do the most thorough testing of itself. Oracle doesn't seem to give you the option to not install the hundreds of megs of documentation on the Nth machine where you just needed the damn client lib - less of an issue now than in the smaller disk/partition days. But I think there is room to go further, I don't see any reason why that default install can't include example DBs, sample maintenance scripts, etc. One nice thing to have would be a sample DB with the scripts necessary to spin up a test/demo DB with a size of X megs. Whenever I started with a new DB system, I wished I didn't have to ramp up on a bunch of topics before I was able to build a set of scripts to generate and populate a sizable testing db. There is a big psychological factor if you can install something, type one command and have a db with 250,000 records to start playing with. ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Bruno Wolff III wrote: On Fri, Apr 23, 2004 at 16:36:57 -0400, [EMAIL PROTECTED] wrote: Ease of use is VERY important, but few suggestions that address this are ever really accepted. Yes, focusing on the functionality is the primary concern, but how you set it up and deploy it is VERY important. You guys need to remember, people are coming from a world where MySQL, Oracle, and MSSQL all have nice setup programs. nice must be in the eye of the beholder. I have used Oracle's installer to install a client and was not amused by it need hundreds of megabtyes to do a client install. I second that. I have not found *anybody* who has used Oracle's installer to install the actual database server on Linux or Solaris who has described their installation proceedure as either nice or easy. In fact even reading the installation isntructions is enough to give you second thoughts MS SQL does have a nice installer, however, as do most binary open source products for Windows. I am completely confident that PostgreSQL for Windows, when it arrives, will have a nice GUI-based installer. Best Wishes, Chris Travers Metatron Technology Consulting begin:vcard fn:Chris Travers n:Travers;Chris email;internet:[EMAIL PROTECTED] x-mozilla-html:FALSE version:2.1 end:vcard ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
Re: [HACKERS] What can we learn from MySQL?
I'm certain you guys could do a far better installer than the one Oracle has, which is very, very fragile. There's all kinds of wonkiness to try and get it to work on a non-supported linux distro (gentoo in my case), and from talking to people who've dealt with it on redhat it's no better. Also, if possible, I think an installer that plays nice with package management systems would be important. Many users want to use their OS's package system to handle install and upgrade rather than some other installer. On Sat, Apr 24, 2004 at 12:10:01PM -0500, Bruno Wolff III wrote: On Fri, Apr 23, 2004 at 16:36:57 -0400, [EMAIL PROTECTED] wrote: Ease of use is VERY important, but few suggestions that address this are ever really accepted. Yes, focusing on the functionality is the primary concern, but how you set it up and deploy it is VERY important. You guys need to remember, people are coming from a world where MySQL, Oracle, and MSSQL all have nice setup programs. nice must be in the eye of the beholder. I have used Oracle's installer to install a client and was not amused by it need hundreds of megabtyes to do a client install. ---(end of broadcast)--- TIP 8: explain analyze is your friend -- Jim C. Nasby, Database Consultant [EMAIL PROTECTED] Member: Triangle Fraternity, Sports Car Club of America Give your computer some brain candy! www.distributed.net Team #1828 Windows: Where do you want to go today? Linux: Where do you want to go tomorrow? FreeBSD: Are you guys coming, or what? ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [HACKERS] What can we learn from MySQL?
Jean-Michel POURE wrote: [ PGP not available, raw data follows ] -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. Dear Bruce, Taking the example of pgAdmin III, which reached nearly one million hits in December (http://www.pgadmin.org/stats/webalizer), nothing seems impossible for PostgreSQL. Why not create an all-in-one bundle offering PostgreSQL, Apache, Php and PhpPgAdmin for Win32 and ... mass-release it. There is no need to create a complete installer. There could be a single installer executing other installers (like it is sometimes the case in the Win32 world). So that installers remain different. A single web page like http://win.postgresql.org; in 40 languages is enough to mass-release PostgreSQL. With an installer and a single web page, PostgreSQL Win32 could quickly reach one million downloads every month. There is no need to look for complicated strategies. Every month, there can be 10% more downloads. In the end, people will even forget the name of MySQL. That seems like a good idea. -- Bruce Momjian| http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup.| Newtown Square, Pennsylvania 19073 ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
Re: [HACKERS] What can we learn from MySQL?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. Dear Bruce, Taking the example of pgAdmin III, which reached nearly one million hits in December (http://www.pgadmin.org/stats/webalizer), nothing seems impossible for PostgreSQL. Why not create an all-in-one bundle offering PostgreSQL, Apache, Php and PhpPgAdmin for Win32 and ... mass-release it. There is no need to create a complete installer. There could be a single installer executing other installers (like it is sometimes the case in the Win32 world). So that installers remain different. A single web page like http://win.postgresql.org; in 40 languages is enough to mass-release PostgreSQL. With an installer and a single web page, PostgreSQL Win32 could quickly reach one million downloads every month. There is no need to look for complicated strategies. Every month, there can be 10% more downloads. In the end, people will even forget the name of MySQL. Cheers, Jean-Michel -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFAjW11extoHHj2YFMRAggVAJ0e/W4D/tnm/AtMK0nbjfDROtv/fwCfQ/eC KAnaz5T3PCceVlVS6zirsqg= =N1NM -END PGP SIGNATURE- ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Rob wrote: But I think there is room to go further, I don't see any reason why that default install can't include example DBs, One reason is that a useful example database would likely have a download footprint of 10 MB or more. Having this in the default download would not be appreciated by many people. Of course having some example database available at all would be a good idea, but then as a separate download. ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Peter Eisentraut wrote:
Rob wrote:
But I think there is room to go further, I don't see any reason why
that default install can't include example DBs,
One reason is that a useful example database would likely have a
download footprint of 10 MB or more. Having this in the default
download would not be appreciated by many people. Of course having
some example database available at all would be a good idea, but then
as a separate download.
Here is a little psql script I wrote to populate a table with random
data.
--
Bruce Momjian| http://candle.pha.pa.us
[EMAIL PROTECTED] | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup.| Newtown Square, Pennsylvania 19073
\set ECHO all
\timing
DROP TABLE perftest;
CREATE TABLE perftest (col text);
-- prime table with one row
INSERT INTO perftest VALUES ('0.364461265208414');
-- continously double the table size
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
INSERT INTO perftest SELECT random()::text FROM perftest;
-- insert a constant in the middle of the table, for use later
INSERT INTO perftest VALUES ('0.608254158221304');
INSERT INTO perftest SELECT random()::text FROM perftest;
-- 32770 rows
-- vacuum, create index
VACUUM ANALYZE perftest;
CREATE INDEX i_perftest ON perftest (col);
-- reduce chance of checkpoint during tests
CHECKPOINT;
-- turn on logging
SET log_duration = TRUE;
SET client_min_messages = 'log';
-- run normal and prepared queries
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
PREPARE perftest_prep (text) AS SELECT col FROM perftest WHERE col = $1;
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
-- first time the entire statement
SET log_statement_stats = TRUE;
-- run normal and prepared queries
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
PREPARE perftest_prep (text) AS SELECT col FROM perftest WHERE col = $1;
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
-- now log each query stage
SET log_statement_stats = FALSE;
SET log_parser_stats = TRUE;
SET log_planner_stats = TRUE;
SET log_executor_stats = TRUE;
-- run normal and prepared queries
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
SELECT col FROM perftest WHERE col = '0.608254158221304';
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
EXECUTE perftest_prep ('0.608254158221304');
---(end of broadcast)---
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Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Tom Lane wrote: Aside from the reality that apps aren't very consistent about their quoting behavior, the fly in this ointment is that whenever you query the database catalogs you will see the stored spelling of the name. So apps that rely on seeing the same spelling in the catalog that they entered could break. (In practice this doesn't seem to be as big a problem as the sloppy-quoting-behavior issue, though.) Shouldn't apps only really be querying the information schema if they're expecting spec compliant behavior? If so, a GUC variable with an access function ought to be enough to get up or down casing as desired, I'd think. Joe ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Fri, Apr 23, 2004 at 10:56:43PM -0700, Joe Conway wrote: Tom Lane wrote: Aside from the reality that apps aren't very consistent about their quoting behavior, the fly in this ointment is that whenever you query the database catalogs you will see the stored spelling of the name. So apps that rely on seeing the same spelling in the catalog that they entered could break. (In practice this doesn't seem to be as big a problem as the sloppy-quoting-behavior issue, though.) Shouldn't apps only really be querying the information schema if they're expecting spec compliant behavior? If so, a GUC variable with an access function ought to be enough to get up or down casing as desired, I'd think. Some questions: Is there a way to make this work? At what level should the current system be modified? If the parser or lexer is to be modified, are they going to need database access? They are not allowed to, AFAIR. One could invent a GUC setting for this, and have it set at database creation time. How would shared catalogs be handled? Should we have a template database for uppercase and another one for lower case databases? Should non-shared catalogs be handled in a special way? Or maybe it is a compilation switch. What issues would arise? -- Alvaro Herrera (alvherre[a]dcc.uchile.cl) Before you were born your parents weren't as boring as they are now. They got that way paying your bills, cleaning up your room and listening to you tell them how idealistic you are. -- Charles J. Sykes' advice to teenagers ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
Re: [HACKERS] What can we learn from MySQL?
On Fri, Apr 23, 2004 at 16:36:57 -0400, [EMAIL PROTECTED] wrote: Ease of use is VERY important, but few suggestions that address this are ever really accepted. Yes, focusing on the functionality is the primary concern, but how you set it up and deploy it is VERY important. You guys need to remember, people are coming from a world where MySQL, Oracle, and MSSQL all have nice setup programs. nice must be in the eye of the beholder. I have used Oracle's installer to install a client and was not amused by it need hundreds of megabtyes to do a client install. ---(end of broadcast)--- TIP 8: explain analyze is your friend
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Fri, Apr 23, 2004 at 11:45:28AM -0400, Robert Treat wrote: lower will now simply be folder upper. the only people who will have a problem are those who quote on one end but not the other, which is bad practice anyways... so i would say if your serious about it, make the patch as GUC case_folding for upper or lower and get a taste for what breaks inside the db. If it were that easy, it wouldn't matter, right? That is, if you had a system which was either consistently quoted or consistently unquoted, then you'd never run into the problem of the upper-or-lower question. It's precisely _because_ systems often have been maintained by various cranks for 20 years that it's a problem. One guy thinks quoting is stupid. Another thinks that if you don't quote, you're asking for trouble, A third has been rigourous in following the quoting convention he learned in his last job. The ship date is three weeks away, and there are 802 P1 bugs filed. What chance do you think there is that someone is going to scrub all the checkins of quotes (or apply them carefully)? This is _exactly_ why standards compliance for this stuff matters, and why backward comaptibility is also a top priority. A -- Andrew Sullivan | [EMAIL PROTECTED] ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
Re: [HACKERS] What can we learn from MySQL?
I think that when considering install, it is very important, if not critical, that we all understand who is doing the install. Certainly if it is a person much like us, meaning people on the hackers/development list, we can all handle more terse installs. Personally, I like the freedom of choices, and not having a result of hundreds of megs that I know are not required. On the other hand, we are really a minority. The masses certainly like simple installs, regardless of just how many megs are used, needed or not. If the masses really cared, then Microsoft would be in trouble. But, as we can see in the market place, they don't. In fact, most people think more is better. Somehow they think 2 CDROMs is better than 1 CDROM. So, if it takes an extra 200 meg to make a glitsy install with little videos expounding on how great Postgresql is, then for that user, it will make all of the difference. We need to remember who the audience is. We cannot gain mass market share otherwise. My 2 cents, won't buy coffee, Jordan Henderson --- Bruno Wolff III [EMAIL PROTECTED] wrote: On Fri, Apr 23, 2004 at 16:36:57 -0400, [EMAIL PROTECTED] wrote: Ease of use is VERY important, but few suggestions that address this are ever really accepted. Yes, focusing on the functionality is the primary concern, but how you set it up and deploy it is VERY important. You guys need to remember, people are coming from a world where MySQL, Oracle, and MSSQL all have nice setup programs. nice must be in the eye of the beholder. I have used Oracle's installer to install a client and was not amused by it need hundreds of megabtyes to do a client install. ---(end of broadcast)--- TIP 8: explain analyze is your friend ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [HACKERS] What can we learn from MySQL?
Bruce Momjian wrote: My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. MySQL was my first introduction to SQL databases (I had dabbled with Clipper and Foxpro years earlier, but only for a couple of months and had forgotten most of it by then). So practically all I knew about SQL and RDBMS I got from the MySQL manual. IIRC, MySQL has a chapter for beginners, on how to create your first database and tables, how to insert a record, etc. I see that the Pg manual already has that. Good. The problem is that, since MySQL was my only SQL database I knew for a long time, I didn't know that an RDBMS can be [much] more than what MySQL was/is. I could only do simple SELECTs (no JOINs, let alone subselect since MySQL doesn't support it) but found it sufficient, since I did most of the hard work from Perl/PHP (for example, doing an adjacency tree query by several SELECTs and combining the results myself from the client side). I didn't know squat about stored procedures or triggers or check constraints. I had no idea what a foreign key is -- and when MySQL manual says it's not necessary, slow, and evil, I believed it. I never bothered checking out other databases until I started reading more about transactions, reliability, Date/Codd, and other more theoretical stuffs. Only then I started trying out Interbase, Firebird, SAPDB, DB2, Oracle, and later Pg. So in my opinion, as long as the general awareness about RDBMS (on what tasks/responsibilities it should do, what features it generally has to have, etc) is low, people will be looking at MySQL as good enough and will not be motivated to look around for something better. As a comparison, I'm always amazed by people who use Windows 95/98/Me. They find it normal/good enough that the system crashes every now and then, has to be rebooted every few hours (or every time they install something). They don't know of anything better. So perhaps the direction of advocacy should be towards increasing that awareness? -- dave ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
Re: [HACKERS] What can we learn from MySQL?
Bruce Momjian wrote: Here is a blog about a recent MySQL conference with title, Why MySQL Grew So Fast: http://www.oreillynet.com/pub/wlg/4715 and a a Slashdot discussion about it: http://developers.slashdot.org/article.pl?sid=04/04/20/2229212mode=nestedtid=137tid=185tid=187tid=198 My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. Questions I have are: o Are we marketing ourselves properly? o Are we focused enough on ease-of-use issues? o How do we position ourselves against a database that some say is good enough (MySQL), and another one that some say is too much (Oracle) o Are our priorities too technically driven? Do we care enough about interoperability? When I ask about non-standard complience of Pg (turning unquoted identifiers to lowercase instead of uppercase, violating the SQL standard, and requring an expensive rewrite of clients), and I get the answer uppercase is ugly, I think something is wrong. To be fair, I got a fair amount of legitimate problems with MIGRATING to standard compliency. I find these issues legitimate, though solveable. Getting a we prefer lowercase to the standard, however, means to me that even if I write a patch to start migration, I'm not likely to get it in. Shachar -- Shachar Shemesh Lingnu Open Source Consulting http://www.lingnu.com/ ---(end of broadcast)--- TIP 8: explain analyze is your friend
Re: [HACKERS] What can we learn from MySQL?
My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. Questions I have are: o Are we focused enough on ease-of-use issues? There are two issues here : ease-of-use for admin and basic users. I recognize my focus on the later as someone using pg as a teaching tool. Having a correct SQL implementation, referential integrity and transactions is an important issue when explaining DB concepts. That's why I could not have used mysql. Having some help/hint/advices/caveat provided for basic users would help. But some of the change I submitted require a lot of changes, especially in the parser, hence are rejected. I also submit patch to try to fix some surprises (there is != but not ==, non-user tables are in stat_.._user_tables viewa...) I had while using pg. My agenda is quite hard to get thru the hacker/patch lists. Maybe because the patches I sent are not really good enough, but also because it is not a real focus of postgres developers. On for former point, admin ease-of-use, A little story a few month ago. I succeeded in advising production people here to switch some applications from a mysql database, which was working perfectly, to a postgres database. A few weeks later, the performances were desastrous. 30 seconds to get an answer to a simple select on a 1500 entries tables. After investigation, the problems were: - no vacuum, although there were daily DELETE FROM tables; to empty all the data and reload from another source. - no analyze, because the admin did not know about it. - very small shared_buffers setting (16 the minimum thanks to FreeBSD default installation...). With mysql, you don't need to vacuum analyze, and I think the memory management maybe more or less automatic. I think that the default configuration should have some automagic features so that reasonnable values are chosen depending on the available resources, which would allow basic users not to care about it. memory_management = auto/manual... You also need to have a basic standalone binary port to windows. I wish I could allow simply my students to use pg on their home computers. Well, it does not work that simply, you need cygwin at the time, and I haven't seen the windows binary available for download from the pg download page. o How do we position ourselves against a database that some say is good enough (MySQL), and another one that some say is too much (Oracle) free and serious. o Are our priorities too technically driven? Not bad if other agendas can also get through. -- Fabien Coelho - [EMAIL PROTECTED] ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [HACKERS] What can we learn from MySQL?
On Fri, Apr 23, 2004 at 01:05:21PM +0700, David Garamond wrote: So in my opinion, as long as the general awareness about RDBMS (on what tasks/responsibilities it should do, what features it generally has to have, etc) is low, people will be looking at MySQL as good enough and will not be motivated to look around for something better. As a comparison, I'm always amazed by people who use Windows 95/98/Me. They find it normal/good enough that the system crashes every now and then, has to be rebooted every few hours (or every time they install something). They don't know of anything better. Agree. People don't know that an RDBMS can be more better. A lot of users think speed is the most important thing. And they check the performance of SQL server by time mysql -e SELECT... but they don't know something about concurrency or locking. BTW, is the current MySQL target (replication, transactions, ..etc) what typical MySQL users expect? I think they will lost users who love classic, fast and simple MySQL. The trade with advanced SQL servers is pretty full. I don't understand why MySQL developers want to leave their current possition and want to fight with PostgreSQL, Oracle, DB2 .. etc. Karel -- Karel Zak [EMAIL PROTECTED] http://home.zf.jcu.cz/~zakkr/ ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
Re: [HACKERS] What can we learn from MySQL?
On Fri, 23 Apr 2004, Shachar Shemesh wrote: When I ask about non-standard complience of Pg (turning unquoted identifiers to lowercase instead of uppercase, violating the SQL standard, and requring an expensive rewrite of clients), and I get the answer uppercase is ugly, I think something is wrong. I would love if someone fixed pg so that one can get the standard behaviour. It would however have to be a setting that can be changed so we are still backward compatible. that even if I write a patch to start migration, I'm not likely to get it in. Just changing to uppercase would break old code so such a patch should not just be commited. But would people stop a patch that is backward compatible (in the worst case a setting during initdb)? I'm not so sure they will. -- /Dennis Björklund ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [HACKERS] What can we learn from MySQL?
Karel Zak wrote: On Fri, Apr 23, 2004 at 01:05:21PM +0700, David Garamond wrote: So in my opinion, as long as the general awareness about RDBMS (on what tasks/responsibilities it should do, what features it generally has to have, etc) is low, people will be looking at MySQL as good enough and will not be motivated to look around for something better. As a comparison, I'm always amazed by people who use Windows 95/98/Me. They find it normal/good enough that the system crashes every now and then, has to be rebooted every few hours (or every time they install something). They don't know of anything better. Agree. People don't know that an RDBMS can be more better. A lot of users think speed is the most important thing. And they check the performance of SQL server by time mysql -e SELECT... but they don't know something about concurrency or locking. Even worse: They benchmark SELECT 1+1 one million times. The performance of SELECT 1+1 has NOTHING to do with the REAL performance of a database. Has anybody seen the benchmarks on MySQL??? They have benchmarked CREATE TABLE and so forth. This is the most useless thing I have ever seen. It is so annoying _ I had to post it ;). Regards, Hans BTW, is the current MySQL target (replication, transactions, ..etc) what typical MySQL users expect? I think they will lost users who love classic, fast and simple MySQL. The trade with advanced SQL servers is pretty full. I don't understand why MySQL developers want to leave their current possition and want to fight with PostgreSQL, Oracle, DB2 .. etc. Karel -- Cybertec Geschwinde u Schoenig Schoengrabern 134, A-2020 Hollabrunn, Austria Tel: +43/2952/30706 or +43/664/233 90 75 www.cybertec.at, www.postgresql.at, kernel.cybertec.at ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
Re: [HACKERS] What can we learn from MySQL?
Dennis Bjorklund [EMAIL PROTECTED] writes: On Fri, 23 Apr 2004, Shachar Shemesh wrote: When I ask about non-standard complience of Pg (turning unquoted identifiers to lowercase instead of uppercase, violating the SQL standard, and requring an expensive rewrite of clients), and I get the answer uppercase is ugly, I think something is wrong. I would love if someone fixed pg so that one can get the standard behaviour. It would however have to be a setting that can be changed so we are still backward compatible. Yes. There have been repeated discussions about how to do this, but no one's come up with a solution that seems workable. See the archives if you care. For the foreseeable future, backwards compatibility is going to trump standards compliance on this point. That doesn't mean we don't care about compliance; it does mean that it is not the *only* goal. I find it a bit odd to be debating this point in this thread, seeing that one of the big lessons I draw from MySQL is standards compliance does not matter... regards, tom lane ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
Re: [HACKERS] What can we learn from MySQL?
There are two issues here : ease-of-use for admin and basic users. On for former point, admin ease-of-use, A little story a few month ago. I succeeded in advising production people here to switch some applications from a mysql database, which was working perfectly, to a postgres database. A few weeks later, the performances were desastrous. 30 seconds to get an answer to a simple select on a 1500 entries tables. After investigation, the problems were: - no vacuum, although there were daily DELETE FROM tables; to empty all the data and reload from another source. - no analyze, because the admin did not know about it. My goal is to have pg_autovacuum integrated into the backend for 7.5. I don't know if it will default to being turned on or off, I'm sure that will be a discussion, but if it is defaulted to on, then this whole problem of having to train newbies about vacuum should just go away. Matthew ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html
Re: [HACKERS] What can we learn from MySQL?
Dear Matthew, My goal is to have pg_autovacuum integrated into the backend for 7.5. I know about that, and that would be a good thing. I don't know if it will default to being turned on or off, I'm sure that will be a discussion, but if it is defaulted to on, then this whole problem of having to train newbies about vacuum should just go away. Yes. I really thing that it should be on by default, because those who will need it more than others are those who will not know about tuning configuration parameters. As I understand the requirements from pg_autovacuum, it means that some statistics will have to be on by default as well. Good luck;-) -- Fabien Coelho - [EMAIL PROTECTED] ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [HACKERS] What can we learn from MySQL?
Bruce Momjian wrote: My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. MySQL became popular at my university when the students discovered they could install it on their personal computers. Just the exposure for personal development and trial is enough to win a following. Win32 installations are a big deal. With win32 machines outnumbering *nix operating systems by more than 10 to 1 (more on personal computers), the unix only restriction reduced the number of possible people testing and developing with it by at least that amount. Most developers I know work primarily on Windows workstations and asking for a machine to run Postgresql on unix is just not practical. With the win32 port, they can run it on their computers and at least test or evaluate their projects. I and a number of my friends are exceptionally please at the progress of the win32 port. Thank you! ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [HACKERS] What can we learn from MySQL?
My goal is to have pg_autovacuum integrated into the backend for 7.5. I know about that, and that would be a good thing. I hope so! I don't know if it will default to being turned on or off, I'm sure that will be a discussion, but if it is defaulted to on, then this whole problem of having to train newbies about vacuum should just go away. Yes. I really thing that it should be on by default, because those who will need it more than others are those who will not know about tuning configuration parameters. As I understand the requirements from pg_autovacuum, it means that some statistics will have to be on by default as well. I think it's premature to have this conversation. I need to get something done / working before we dicuss optimal configuration. That said, I also agree that if it's good enough, it should be on by default. Good luck;-) Thanks, I'll need it Matthew ps: I'm hoping to have time to work on this starting in May. I haven't really done any development on pg_autovacuum beyond bug fixing what is already in CVS, so If someone out there wants to work on it, don't wait for me, I won't be offended :-) I just want to see it up and running. ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Fri, 2004-04-23 at 05:22, Dennis Bjorklund wrote:
On Fri, 23 Apr 2004, Shachar Shemesh wrote:
When I ask about non-standard complience of Pg (turning unquoted
identifiers to lowercase instead of uppercase, violating the SQL
standard, and requring an expensive rewrite of clients), and I get the
answer uppercase is ugly, I think something is wrong.
I would love if someone fixed pg so that one can get the standard
behaviour. It would however have to be a setting that can be changed so we
are still backward compatible.
that even if I write a patch to start migration, I'm not likely to get
it in.
Just changing to uppercase would break old code so such a patch should not
just be commited. But would people stop a patch that is backward
compatible (in the worst case a setting during initdb)? I'm not so sure
they will.
I know this to be true, but don't fully understand it... if our default
behavior is to fold lower, and we change it to just fold upper... then
in theory this shouldn't break anything since what used to be folder
lower will now simply be folder upper. the only people who will have a
problem are those who quote on one end but not the other, which is bad
practice anyways... so i would say if your serious about it, make the
patch as GUC case_folding for upper or lower and get a taste for what
breaks inside the db.
Robert Treat
--
Build A Brighter Lamp :: Linux Apache {middleware} PostgreSQL
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Re: [HACKERS] What can we learn from MySQL?
Matthew T. O'Connor wrote: I think it's premature to have this conversation. I need to get something done / working before we dicuss optimal configuration. That said, I also agree that if it's good enough, it should be on by default. Good luck;-) Thanks, I'll need it Matthew ps: I'm hoping to have time to work on this starting in May. I haven't really done any development on pg_autovacuum beyond bug fixing what is already in CVS, so If someone out there wants to work on it, don't wait for me, I won't be offended :-) I just want to see it up and running. I am around for assistance. -- Bruce Momjian| http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup.| Newtown Square, Pennsylvania 19073 ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [HACKERS] What can we learn from MySQL?
Does the current implementation of pg_autovacuum have a way of setting windows where it is allowed to vacuum? Many large 24/7 will only allow vacuumming at certain times of the day. Dave On Fri, 2004-04-23 at 08:58, Matthew T. O'Connor wrote: There are two issues here : ease-of-use for admin and basic users. On for former point, admin ease-of-use, A little story a few month ago. I succeeded in advising production people here to switch some applications from a mysql database, which was working perfectly, to a postgres database. A few weeks later, the performances were desastrous. 30 seconds to get an answer to a simple select on a 1500 entries tables. After investigation, the problems were: - no vacuum, although there were daily DELETE FROM tables; to empty all the data and reload from another source. - no analyze, because the admin did not know about it. My goal is to have pg_autovacuum integrated into the backend for 7.5. I don't know if it will default to being turned on or off, I'm sure that will be a discussion, but if it is defaulted to on, then this whole problem of having to train newbies about vacuum should just go away. Matthew ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faqs/FAQ.html !DSPAM:40892fd393131228097780! -- Dave Cramer 519 939 0336 ICQ # 14675561 ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Fri, 23 Apr 2004, Robert Treat wrote: On Fri, 2004-04-23 at 05:22, Dennis Bjorklund wrote: On Fri, 23 Apr 2004, Shachar Shemesh wrote: When I ask about non-standard complience of Pg (turning unquoted identifiers to lowercase instead of uppercase, violating the SQL standard, and requring an expensive rewrite of clients), and I get the answer uppercase is ugly, I think something is wrong. I would love if someone fixed pg so that one can get the standard behaviour. It would however have to be a setting that can be changed so we are still backward compatible. that even if I write a patch to start migration, I'm not likely to get it in. Just changing to uppercase would break old code so such a patch should not just be commited. But would people stop a patch that is backward compatible (in the worst case a setting during initdb)? I'm not so sure they will. I know this to be true, but don't fully understand it... if our default behavior is to fold lower, and we change it to just fold upper... then in theory this shouldn't break anything since what used to be folder lower will now simply be folder upper. the only people who will have a problem are those who quote on one end but not the other, which is bad practice anyways... so i would say if your serious about it, make the patch as GUC case_folding for upper or lower and get a taste for what breaks inside the db. I've tried just changing the parser to unconditionally casefold to upper. First thing that happens is that initdb breaks. In addition, you have potential issues with comparisons against the catalog's versions of standard functions as such if you allow the case folding to be changed after the catalogs are setup. ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [HACKERS] What can we learn from MySQL?
On Fri, 23 Apr 2004 11:07:20 -0400 Dave Cramer [EMAIL PROTECTED] wrote: Does the current implementation of pg_autovacuum have a way of setting windows where it is allowed to vacuum? Many large 24/7 will only allow vacuumming at certain times of the day. It seems to me that the point of pg_autovacuum would be to run 24/7 so that there is never big hit on the system. Perhaps it could be designed to throttle itself based on current system usage though. -- D'Arcy J.M. Cain [EMAIL PROTECTED]|vex}.net | Democracy is three wolves http://www.druid.net/darcy/| and a sheep voting on +1 416 425 1212 (DoD#0082)(eNTP) | what's for dinner. ---(end of broadcast)--- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
Re: [HACKERS] What can we learn from MySQL?
Does the current implementation of pg_autovacuum have a way of setting windows where it is allowed to vacuum? Many large 24/7 will only allow vacuumming at certain times of the day. No the current implementation doesn't, but such a feature is in the works (planned anyway). What I was envisioning is the ability to set two different sets of thresholds (peak / off peak). If you demand zero vacuuming during peak times, you could set that threshold to -1, or some such setting. FYI I wouldn't remcommend defaulting pg_autovacuum to on until it does this, and a few more things that are also planned (see the archives). Matthew ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [HACKERS] What can we learn from MySQL?
On Fri, 23 Apr 2004 11:07:20 -0400 Dave Cramer [EMAIL PROTECTED] wrote: Does the current implementation of pg_autovacuum have a way of setting windows where it is allowed to vacuum? Many large 24/7 will only allow vacuumming at certain times of the day. It seems to me that the point of pg_autovacuum would be to run 24/7 so that there is never big hit on the system. Perhaps it could be designed to throttle itself based on current system usage though. Right, there has been some talk about taking the system load into account, but no action yet. One comment I failed to make in my last email was that there should be less need to explictly disallow vacuum during peak periods since vacuum will only be occuring on specific tables when needed, which will effect the server for a much smaller period of time than a general vacuum command that touches all the tables. ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Stephan Szabo wrote: I know this to be true, but don't fully understand it... if our default behavior is to fold lower, and we change it to just fold upper... then in theory this shouldn't break anything since what used to be folder lower will now simply be folder upper. the only people who will have a problem are those who quote on one end but not the other, which is bad practice anyways... so i would say if your serious about it, make the patch as GUC case_folding for upper or lower and get a taste for what breaks inside the db. I've tried just changing the parser to unconditionally casefold to upper. First thing that happens is that initdb breaks. In addition, you have potential issues with comparisons against the catalog's versions of standard functions as such if you allow the case folding to be changed after the catalogs are setup. ISTM that rather than a having a GUC setting, initdb would be the right time to make this choice. I'm not saying it would be easy, but it seems (without looking into it deeply) at least possible. cheers andrew ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [HACKERS] What can we learn from MySQL?
D'Arcy J.M. Cain wrote: On Fri, 23 Apr 2004 11:07:20 -0400 Dave Cramer [EMAIL PROTECTED] wrote: Does the current implementation of pg_autovacuum have a way of setting windows where it is allowed to vacuum? Many large 24/7 will only allow vacuumming at certain times of the day. It seems to me that the point of pg_autovacuum would be to run 24/7 so that there is never big hit on the system. Perhaps it could be designed to throttle itself based on current system usage though. Or the number of connected backends, or both? -- Bruce Momjian| http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup.| Newtown Square, Pennsylvania 19073 ---(end of broadcast)--- TIP 8: explain analyze is your friend
Re: [HACKERS] What can we learn from MySQL?
On Fri, 23 Apr 2004 13:08:30 -0400 (EDT) Bruce Momjian [EMAIL PROTECTED] wrote: D'Arcy J.M. Cain wrote: It seems to me that the point of pg_autovacuum would be to run 24/7 so that there is never big hit on the system. Perhaps it could be designed to throttle itself based on current system usage though. Or the number of connected backends, or both? I am sure that there are lots of ways to guage. Not sure which is best but I am sure that the smart people here will figure it out. The important thing, I think, is to let the engine make the decision dynamically. Personally I don't have a quiet time per se but there are random quiet periods. Something that jumps into the fray at those points would be really nicwe. -- D'Arcy J.M. Cain [EMAIL PROTECTED]|vex}.net | Democracy is three wolves http://www.druid.net/darcy/| and a sheep voting on +1 416 425 1212 (DoD#0082)(eNTP) | what's for dinner. ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Fri, 2004-04-23 at 13:11, Andrew Dunstan wrote:
Stephan Szabo wrote:
I know this to be true, but don't fully understand it... if our default
behavior is to fold lower, and we change it to just fold upper... then
in theory this shouldn't break anything since what used to be folder
lower will now simply be folder upper. the only people who will have a
problem are those who quote on one end but not the other, which is bad
practice anyways... so i would say if your serious about it, make the
patch as GUC case_folding for upper or lower and get a taste for what
breaks inside the db.
I've tried just changing the parser to unconditionally casefold to upper.
First thing that happens is that initdb breaks. In addition, you have
potential issues with comparisons against the catalog's versions of
standard functions as such if you allow the case folding to be changed
after the catalogs are setup.
ISTM that rather than a having a GUC setting, initdb would be the right
time to make this choice. I'm not saying it would be easy, but it seems
(without looking into it deeply) at least possible.
This implies that the standard functions are created with explicit
quoting to make the lower case named? Shouldn't all functions be
created without any quoting so they fold to whichever way the settings
are set? Hmm... I see your angle Andrew.. they are going to be created
one way or the other so you'd be hard pressed to do it at any time other
than initdb time... of course you could just create duplicates of all
the functions in both upper and lower case, that way whichever way you
fold it matches :-)
Robert Treat
--
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Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Robert Treat wrote: On Fri, 2004-04-23 at 13:11, Andrew Dunstan wrote: Stephan Szabo wrote: I know this to be true, but don't fully understand it... if our default behavior is to fold lower, and we change it to just fold upper... then in theory this shouldn't break anything since what used to be folder lower will now simply be folder upper. the only people who will have a problem are those who quote on one end but not the other, which is bad practice anyways... so i would say if your serious about it, make the patch as GUC case_folding for upper or lower and get a taste for what breaks inside the db. I've tried just changing the parser to unconditionally casefold to upper. First thing that happens is that initdb breaks. In addition, you have potential issues with comparisons against the catalog's versions of standard functions as such if you allow the case folding to be changed after the catalogs are setup. ISTM that rather than a having a GUC setting, initdb would be the right time to make this choice. I'm not saying it would be easy, but it seems (without looking into it deeply) at least possible. This implies that the standard functions are created with explicit quoting to make the lower case named? Shouldn't all functions be created without any quoting so they fold to whichever way the settings are set? Hmm... I see your angle Andrew.. they are going to be created one way or the other so you'd be hard pressed to do it at any time other than initdb time... of course you could just create duplicates of all the functions in both upper and lower case, that way whichever way you fold it matches :-) That strikes me as an instant recipe for shooting yourself in the foot, as well as providing useless catalog bloat. Things need *one* canonical name, IMNSHO. cheers andrew ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [HACKERS] What can we learn from MySQL?
On Thu, 2004-04-22 at 21:09, Bruce Momjian wrote: Questions I have are: o Are we marketing ourselves properly? It is perhaps less a matter of marketing and more a matter of word-of-mouth mind share. I don't see much evidence of effective direct marketing, but I've noticed a huge growth in mind share among the technical crowd over the last few years, which appears to be an outgrowth of technical reputation. o Are we focused enough on ease-of-use issues? No, and I think this is THE biggest impediment to popularity. The real question should actually be ease-of-use for who?. I had little difficulty adapting to Postgres because I have tons of database experience and so I knew what I was looking for in the technical documentation, which is quite good for an experienced person. But I have noticed that most people who have a much more limited experience with RDBMS administration have a hard time getting started because the use curve is pretty steep. Ease of use isn't an issue for people like me -- I find it very easy -- but is a significant hurdle for most everyone else e.g. casual developers. Some specific recommendations on this: - Make a standard GUI admin tool a prominent part of the standard Postgres distribution, something along the lines of pgAdmin. I don't use it, but a lot of other people need it. For casual database developers, this will greatly enhance apparent ease of use. - Pick a procedural language (plpgsql would seem like the obvious choice) and make it a standard part of a Postgres installation. A standard procedural language should be an out-of-the-box feature that just works. Standard connection drivers (JDBC, ODBC, etc) should also be installed by default and visible to the user. Doing a standard installation of Postgres for most people requires collecting a half dozen bits and pieces that would be installed by default or as install-time options for many databases. - Make it much easier for the relatively clueless to install options in their database. Having an official menu of popular add-on modules (e.g. some of the contrib stuff), and an easy way to automagically enable these capabilities, will serve to educate users that these features exist and encourage their use. I find that most new Postgres users aren't aware that any of these things exist outside of whatever was included with a vanilla install. - Expanded documentation and well-indexed how-tos, both for the database itself and for building applications using the database, for people who are clueless about the technical details of Postgres internals would be helpful. The standard documentation tree is a bit too reference-y for less experienced people, and makes certain contextual assumptions that I find many less experienced trying to navigate it don't have. There is a gap in the documentation between total n00b and experienced DBA that makes it hard to transition that gap. Postgres actually has very good ease-of-use for experienced DBAs, which is something that it definitely gets right. And comparing a Postgres installation to an Oracle installation is like night and day. The problem is that there is no easy bootstrap path for people who aren't so experienced with database administration and maintenance in general. o How do we position ourselves against a database that some say is good enough (MySQL), and another one that some say is too much (Oracle) Postgres should be positioned as an effective alternative to Oracle, and the focus should be on the enterprise database space. Postgres has some significant leverage points in the enterprise database space, even today, and as it becomes more feature-complete it will increasingly become a compelling choice within this space. Comparing Postgres to MySQL is a mistake IMO, as it leads people to assume that they are roughly equivalent products. I actually read a very recent Gartner Group report comparing Postgres and MySQL a couple months ago that basically said that Postgres and MySQL are equivalent products, but MySQL is easier to use. And their reasoning basically cited the myriad of MySQL versus Postgres comparisons on the 'net. The suits who did the research had difficulty evaluating the technical merits and so they based relative equivalence on the fact that they were constantly compared to each other in the same light. From a marketing standpoint, I would focus all my effort on comparisons to commercial enterprise DB engines like Oracle and ignore MySQL. This will define Postgres as a part of the enterprise market and remove it from the same market space that MySQL occupies. o Are our priorities too technically driven? No. The greatest strength of Postgres, marketing-wise, are technical and is what drives its growth today. I think most of the ease-of-use issues are in the packaging of the larger Postgres product and mid-level developer documentation, both of which seem to be eminently
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Fri, 2004-04-23 at 14:28, Andrew Dunstan wrote:
Robert Treat wrote:
of course you could just create duplicates of all
the functions in both upper and lower case, that way whichever way you
fold it matches :-)
That strikes me as an instant recipe for shooting yourself in the foot,
as well as providing useless catalog bloat. Things need *one* canonical
name, IMNSHO.
hence the smiley...
Robert Treat
--
Build A Brighter Lamp :: Linux Apache {middleware} PostgreSQL
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Re: [HACKERS] What can we learn from MySQL?
J. Andrew Rogers wrote: No. The greatest strength of Postgres, marketing-wise, are technical and is what drives its growth today. I think most of the ease-of-use issues are in the packaging of the larger Postgres product and mid-level developer documentation, both of which seem to be eminently solvable problems. I think improved default product packaging would remove 80% plus, up to this point AFAIK the postgresql docs have not been quoted here: http://www.dbdebunk.com which speaks volumes ;) Merlin ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Stephan Szabo wrote: I've tried just changing the parser to unconditionally casefold to upper. First thing that happens is that initdb breaks. In addition, you have potential issues with comparisons against the catalog's versions of standard functions as such if you allow the case folding to be changed after the catalogs are setup. That's not the migration path I was thinking of. What I was thinking of was: 1. Have a setting, probably per-session. Per database works too. 2. Aside from the folder upper and folder lower, have a third option. This is fold upper, if fails, fold lower. If succeeds, issue a warning. This should allow programs that rely on the folding (such as initdb) to be debugged during the transition period. Shachar -- Shachar Shemesh Lingnu Open Source Consulting http://www.lingnu.com/ ---(end of broadcast)--- TIP 8: explain analyze is your friend
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Fri, 23 Apr 2004, Shachar Shemesh wrote: Stephan Szabo wrote: I've tried just changing the parser to unconditionally casefold to upper. First thing that happens is that initdb breaks. In addition, you have potential issues with comparisons against the catalog's versions of standard functions as such if you allow the case folding to be changed after the catalogs are setup. That's not the migration path I was thinking of. What I was thinking of was: 1. Have a setting, probably per-session. Per database works too. 2. Aside from the folder upper and folder lower, have a third option. This is fold upper, if fails, fold lower. If succeeds, issue a warning. This should allow programs that rely on the folding (such as initdb) to be debugged during the transition period. If you can do this in a clean fashion without tromping all around the code, that'd be reasonable, however, istm that you'd need to either pre-fold both directions from the given identifier string and pass an extra copy around or pass the original identifier and its quoted status and fold on use. I think either of these are likely to be very intrusive for what essentially amounts to a transitional feature. In addition, I'm not sure that this would always work in any case, since some of those usages may be quoted identifiers that were once generated from a case-folded string (for example, looking up a name in the catalogs and quoting it). ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
Re: [HACKERS] What can we learn from MySQL?
I have been thinking about this subject for a LONG time, and I hope I have something to contribute. My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. Questions I have are: o Are we marketing ourselves properly? I would say this is a clear 'NO!' When ever I read about open-source being used anywhere, I always read MySQL. They are *very* good at this. o Are we focused enough on ease-of-use issues? Again, NO! To often you guys settle for a work-around rather than a feature. You are satisfied that symlinks will do the job. When someone says they want a feature, you say, no - use a symlink. Ease of use is VERY important, but few suggestions that address this are ever really accepted. Yes, focusing on the functionality is the primary concern, but how you set it up and deploy it is VERY important. You guys need to remember, people are coming from a world where MySQL, Oracle, and MSSQL all have nice setup programs. I know a bit about this, as I made a PostgreSQL for Windows (It was 7.3.x) CD a while back. I had to do a lot of work on the postgresql configuration, database initialization, and create a demo database. It used a minimal cygwin environment, a Windows based installer, and some custom function libraries. I tried to submit the configuration patch and all I got was argument about using symlinks or how it wasn't needed. The thing that kind of bugs me about this O/S project is that you guys are a bit nit-picking about how someone uses it. I believe in the UNIX phylosophy: capability not policy, flexability, etc. You guys seem to need an absolute reason to include something, rather than a good reason to exclude something. A lot of open source developers are turned off by this sort of attitude. o How do we position ourselves against a database that some say is good enough (MySQL), and another one that some say is too much (Oracle) My argument against this is that MySQL is no less complicated than PostgreSQL. PostgreSQL, in production is faster than MySQL, even though MySQL may be marginally faster on some simple queries. The system resource usage of both systems is very similar. PostgreSQL, however, boasts a lot of standard features that make using it much easier. o Are our priorities too technically driven? For the most part, you guys do a great, no .. fantastic, job at the technical details of the database. Even though I get frustrated, I know it is a great system. You *should* be technically driven. If you want to blow the competition out of the water, you need a non-forked Windows version of the database. You need a Java (or some other portable environment) installer. You need to get out of the hand-administered mentality of using symlinks and system level constructs. One should be able to install the software, bring up a nice configuration program which runs you through a few questions, and be done. This same configuration program should be able to help maintain and control an the installation. On Windows, have a service monitor program that starts and stops the server, on UNIX, have it able to start/stop via init.d. Everything else is expert level. ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Fri, 23 Apr 2004, Stephan Szabo wrote: On Fri, 23 Apr 2004, Shachar Shemesh wrote: Stephan Szabo wrote: I've tried just changing the parser to unconditionally casefold to upper. First thing that happens is that initdb breaks. In addition, you have potential issues with comparisons against the catalog's versions of standard functions as such if you allow the case folding to be changed after the catalogs are setup. That's not the migration path I was thinking of. What I was thinking of was: 1. Have a setting, probably per-session. Per database works too. 2. Aside from the folder upper and folder lower, have a third option. This is fold upper, if fails, fold lower. If succeeds, issue a warning. This should allow programs that rely on the folding (such as initdb) to be debugged during the transition period. If you can do this in a clean fashion without tromping all around the code, that'd be reasonable, however, istm that you'd need to either pre-fold both directions from the given identifier string and pass an extra copy around or pass the original identifier and its quoted status and fold on use. I think either of these are likely to be very intrusive for what essentially amounts to a transitional feature. In addition, I'm not sure that this would always work in any case, since some of those usages may be quoted identifiers that were once generated from a case-folded string (for example, looking up a name in the catalogs and quoting it). To clarify, I'm thinking about things where an application had gotten a quoted name and is now trying to use it where the object's canonical name was changed due to quoting changes. This only happens when quoting is inconsistently applied, but that's most of the problem. ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [HACKERS] What can we learn from MySQL?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, - -- Bruce Momjian [EMAIL PROTECTED] wrote: o Are we marketing ourselves properly? while talking about MySQL, there is the myth, that MySQL is fast; and that because MyISAM has no transactions, that it is faster. That is in most cases not true! And for all real live scenarios I know and I tested, Postgres was faster. An example: a critical calculation in one of my online projects needs with MySQL (MyISAM Table Type) about 2.7 to 2.8 seconds (group by on 50 rows for some realtime statistics). But on this time, the complete table is write locked (because MyISAM) :-( With InnoDB the same needs at least 15 to 20 seconds, but other users can insert/update. With PostgreSQL (7.4) it took 1.9 to 2 seconds. Parallel inserts/updates no problem. The only reason why I changed the whole stuff to Postgres yet is, that there are a lot of problems with MySQL special features (see the Gotchas: http://sql-info.de/mysql/gotchas.html) Other example: Some days ago I had a talk with my project leader; I said, that for a new application we should *everything* build with transactions, referential integrity, ... -- his answer: I want to have a fast application. AAARRGH! ;-( So, perhaps it might be a good idea to create a page with feature- and performance comparison. I planed to create an independant and RDBMS benchmark suite (as Free Software including the datas for testing), but I'm not sure if this project ever come true ... o Are we focused enough on ease-of-use issues? I'm not sure about the focus; but the result can be better. When installing and using any type of software, I want that this is as easy as possible while it helps me to understand as much of the backgrounds as possible. Whats about the initdb, postgresql.conf and startup scripts? So, It might be good to have a GUI-Tool (!) in the standard package, which makes an initdb with selectable options and helps the user to set the required options in the postgresql.conf. I'm a computer freak since the mod 80s and I can edit config files. But to have a GUI tool with some explaining texts at the buttons etc is much easyer than hacking a textfile. Also the other stuff mentioned in this thread are important: auto vacuum, windows port, better default values etc. Ease-of-use includes for me localisation and documentation in different languages. As you can see, my english is junky -- so reading german documentation is a lot of easyer for me ;-) o Are our priorities too technically driven? AFAIK it is good to have the priorities technically driven -- if nobody forgets the userfriendlyness ;) Ciao Alvar - -- ** Alvar C.H. Freude -- http://alvar.a-blast.org/ -- http://odem.org/ ** Berufsverbot? http://odem.org/aktuelles/staatsanwalt.de.html ** ODEM.org-Tour: http://tour.odem.org/ ** 5 Jahre Blaster: http://www.a-blast.de/ | http://www.a-blast.de/statistik/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.3 (FreeBSD) iD8DBQFAiX/eOndlH63J86wRAjzhAJ0f24+yuOSElI7NmFuChZUH3miWiACdFoH+ OLC0iUn7VP/ZIA30vU8M0tg= =RVWf -END PGP SIGNATURE- ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED])
Re: [HACKERS] What can we learn from MySQL?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, - -- [EMAIL PROTECTED] wrote: I would say this is a clear 'NO!' When ever I read about open-source being used anywhere, I always read MySQL. They are *very* good at this. yes! Some days ago, there was a news in the Heise Newsticker (most important IT news in germany), about MySQL clustering. http://www.heise.de/newsticker/meldung/46511 4*2 processors with 10 replicated transactions per second was the main statement. I'm sure, that this is the typical MySQL blabla: no transactions, but select statements ... http://www.heise.de/newsticker/foren/go.shtml?read=1msg_id=5487088forum_id =55321 I'm not sure, if iot is a good idea to go down with the niveau to such lies. o Are we focused enough on ease-of-use issues? Again, NO! To often you guys settle for a work-around rather than a feature. You are satisfied that symlinks will do the job. When someone says they want a feature, you say, no - use a symlink. [...] yes, you are right! One additional thing: when updating from 7.x to 7.y, a new initdb is needed. This means: If I have some GB Data, the RDBMS is some ours down for upgrading. This is really no good situation. There should be a way for converting the storage on the fly: Updating and let postgres do the rest automaically. I guess this is not really easy; but it is important! Ciao Alvar - -- ** Alvar C.H. Freude -- http://alvar.a-blast.org/ -- http://odem.org/ ** Berufsverbot? http://odem.org/aktuelles/staatsanwalt.de.html ** ODEM.org-Tour: http://tour.odem.org/ ** 5 Jahre Blaster: http://www.a-blast.de/ | http://www.a-blast.de/statistik/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.3 (FreeBSD) iD8DBQFAiYcpOndlH63J86wRAoj7AKCt+SXIV/1UYa7hZlEpA1SrwpctnQCgpypM 2L5aRteQ7btVuBowcclBc28= =POHj -END PGP SIGNATURE- ---(end of broadcast)--- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Stephan Szabo [EMAIL PROTECTED] writes: To clarify, I'm thinking about things where an application had gotten a quoted name and is now trying to use it where the object's canonical name was changed due to quoting changes. This only happens when quoting is inconsistently applied, but that's most of the problem. Actually, that's *all* the problem, at least as far as SQL commands are concerned. If you are consistent about always quoting or never quoting a particular name, you can't tell the difference between PG's behavior and SQL-spec behavior. Aside from the reality that apps aren't very consistent about their quoting behavior, the fly in this ointment is that whenever you query the database catalogs you will see the stored spelling of the name. So apps that rely on seeing the same spelling in the catalog that they entered could break. (In practice this doesn't seem to be as big a problem as the sloppy-quoting-behavior issue, though.) Personally I don't think that this is a transitional issue and we will someday all be happy in upper-case-only-land. Upper-case-only sucks, by every known measure of readability, and I don't want to have to put up with a database that forces that 1960s-vintage-hardware mindset on me. So what I'm holding out for is a design that lets me continue to see the current behavior if I set a GUC variable that says that's what I want. This seems possible (not easy, but possible) if we are willing to require the choice to be made at compile time ... but that sounds too restrictive to satisfy anybody ... what we need is a design that supports such a choice per-session, and I dunno how to do that. regards, tom lane PS: I resisted the temptation to SET THIS MESSAGE IN ALL UPPER CASE to make the point about readability. But if you want to argue the point with me, I'll be happy to do that for the rest of the thread. ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Sat, 24 Apr 2004, Tom Lane wrote: Upper-case-only sucks, by every known measure of readability, and I don't want to have to put up with a database that forces that 1960s-vintage-hardware mindset on me. Well, get used to it :-) So what I'm holding out for is a design that lets me continue to see the current behavior if I set a GUC variable that says that's what I want. Wouldn't the upper case identifiers just be visible in the \d output, table headers and such. You could still have psql tab completion produce lower case identifiers (if told using some setting). Even if the database store all non quoted names as upper case I would still use lower case in all applications and on the psql command line. It's not a big problem for me if the output of \d and the table headers and such is in upper case. One would get used to it fase. And maybe one can even store an extra bit telling if the string was created with or without quotes and have psql lower case all the ones created without quotes. First I thought that one can store the string with case all the time, and just convert when needed (when comparing identifiers). Perhaps using the non existant locale support and locales such as SQL_UPPER or SQL_MIXED. But it wont work since it would make Foo and Foo clash. When translated directly it would create separate entries Foo and FOO. ps. And if you want to play the WRITE MAILS USING ONLY UPPER CASE, BE MY GUEST! -- /Dennis Björklund ---(end of broadcast)--- TIP 8: explain analyze is your friend
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
Dennis Bjorklund [EMAIL PROTECTED] writes: On Sat, 24 Apr 2004, Tom Lane wrote: So what I'm holding out for is a design that lets me continue to see the current behavior if I set a GUC variable that says that's what I want. Wouldn't the upper case identifiers just be visible in the \d output, table headers and such. Exactly ... and that's where my readability complaint starts ... First I thought that one can store the string with case all the time, and just convert when needed (when comparing identifiers). People keep suggesting these random not-quite-standard behaviors, but I fail to see the point. Are you arguing for exact standards compliance, or not? If you're not, then you have to make your case on the claim that my nonstandard behavior is better than the existing nonstandard behavior. Which might be true, beauty being in the eye of the beholder, but I doubt you can prove it to the extent of overriding the backwards-compatibility issue. regards, tom lane ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [pgsql-advocacy] [HACKERS] What can we learn from MySQL?
On Sat, 24 Apr 2004, Tom Lane wrote: First I thought that one can store the string with case all the time, and just convert when needed (when comparing identifiers). People keep suggesting these random not-quite-standard behaviors, but I fail to see the point. Are you arguing for exact standards compliance, or not? That was me making conversation, pointing out something that does not work. Since it does not work I don't want it to be implemented. And with work I mean not follow the standard. For something to follow standard it has to behave the correct way to the outside, how it's implemented is a different matter. The above does not work. Period. -- /Dennis Björklund ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
[HACKERS] What can we learn from MySQL?
Here is a blog about a recent MySQL conference with title, Why MySQL Grew So Fast: http://www.oreillynet.com/pub/wlg/4715 and a a Slashdot discussion about it: http://developers.slashdot.org/article.pl?sid=04/04/20/2229212mode=nestedtid=137tid=185tid=187tid=198 My question is, What can we learn from MySQL? I don't know there is anything, but I think it makes sense to ask the question. Questions I have are: o Are we marketing ourselves properly? o Are we focused enough on ease-of-use issues? o How do we position ourselves against a database that some say is good enough (MySQL), and another one that some say is too much (Oracle) o Are our priorities too technically driven? -- Bruce Momjian| http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup.| Newtown Square, Pennsylvania 19073 ---(end of broadcast)--- TIP 7: don't forget to increase your free space map settings
