Re: [GENERAL] puzzled by deletion performance

2017-07-14 Thread Tom Lane
"Zhu, Joshua" writes: > I have the following (hypothetical) tables and their relationships (primary > keys are in square brackets): > [server_id] [device_id][sensor_id][property_id] > SERVER --- 1:n --- DEVICE --- 1:n --- SENSOR --- 1:n --- PROPERTY

[GENERAL] puzzled by deletion performance

2017-07-14 Thread Zhu, Joshua
I have the following (hypothetical) tables and their relationships (primary keys are in square brackets): [server_id] [device_id][sensor_id][property_id] SERVER --- 1:n --- DEVICE --- 1:n --- SENSOR --- 1:n --- PROPERTY | |

Re: [GENERAL] Monitoring of a hot standby with a largely idle master

2017-07-14 Thread Jeff Janes
On Thu, Jul 13, 2017 at 10:38 AM, Michael Paquier wrote: > On Thu, Jul 13, 2017 at 7:23 PM, Jeff Janes wrote: > > > > I think that pg_stat_wal_receiver should be crossreferenced in > > https://www.postgresql.org/docs/9.6/static/hot-standby.html,

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread marcelo
I'm sorry. dotConnect for PostgreSql is able to set the schema at connection time. This may be set as part of the connection string, or as a dbconnection class' property. i was in doubt because the version I'm using is somewhat old, but decompiling it shows the property in place. So, I will

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread John R Pierce
On 7/14/2017 4:59 AM, marcelo wrote: Now I have a related question. Could I select a specific schema in the connection string? Say, by example database=mydb.schemanumbertwo ? the default search_path is $user,public so if you connect with different SQL usernames for your different schemas,

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread David G. Johnston
On Fri, Jul 14, 2017 at 9:13 AM, marcelo wrote: > I'll be using Devart's dotConnect. I have two alternatives at this moment > > a) To set the user name to the required schema. This has the (little) > drawback that forces user configuration for every schema... > ​With

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread David G. Johnston
On Fri, Jul 14, 2017 at 9:01 AM, Jerry Sievers wrote: > marcelo writes: > > > Thank you. > > Now I have a related question. > > Could I select a specific schema in the connection string? Say, by > > example database=mydb.schemanumbertwo ? > > >

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread marcelo
I'll be using Devart's dotConnect. I have two alternatives at this moment a) To set the user name to the required schema. This has the (little) drawback that forces user configuration for every schema... b) To manually do something like the JDBC driver you mention, but it triggers some

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread Jerry Sievers
marcelo writes: > Thank you. > Now I have a related question. > Could I select a specific schema in the connection string? Say, by > example database=mydb.schemanumbertwo ? > > I'm asking this because I will be using Devart's dotConnect and Entity > developer to access

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread Thomas Kellerer
marcelo schrieb am 14.07.2017 um 13:59: > Could I select a specific schema in the connection string? Say, by example > database=mydb.schemanumbertwo ? The JDBC driver does indeed support that: jdbc:postgresql://localhost/somedatabase?currentSchema=some_schema I think in the backround it

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread marcelo
Thank you. I know that. It would be my last resort, because aside, I need that every app user must login to be able to assign logical privileges at the app level. Of course, I will have my own tables of users and roles, independently of the postgres users an roles. I will think of it. On

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread Bill Moran
On Fri, 14 Jul 2017 08:59:13 -0300 marcelo wrote: > Thank you. > Now I have a related question. > Could I select a specific schema in the connection string? Say, by > example database=mydb.schemanumbertwo ? > > I'm asking this because I will be using Devart's

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread marcelo
Thank you. Now I have a related question. Could I select a specific schema in the connection string? Say, by example database=mydb.schemanumbertwo ? I'm asking this because I will be using Devart's dotConnect and Entity developer to access the database. I have not full control, so I cannot

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread Berend Tober
marcelo wrote: The question is not trivial. Could I maintain two or three separate/distinct "versions" of same database using one schema for every of them? Could some tables (in the public schema) be shared among all the schemas? Yes and yes. In the Postgresql world, the word "schema" is

Re: [GENERAL] What is exactly a schema?

2017-07-14 Thread Michael Paquier
On Fri, Jul 14, 2017 at 12:00 PM, marcelo wrote: > The question is not trivial. Could I maintain two or three separate/distinct > "versions" of same database using one schema for every of them? > Could some tables (in the public schema) be shared among all the schemas?

[GENERAL] What is exactly a schema?

2017-07-14 Thread marcelo
The question is not trivial. Could I maintain two or three separate/distinct "versions" of same database using one schema for every of them? Could some tables (in the public schema) be shared among all the schemas? -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make

Re: [GENERAL] Changing collate & ctype for an existing database

2017-07-14 Thread Albe Laurenz
rihad wrote: > Btw, can we wrap the update of datcollate and rebuilding of > textual indices inside a transaction with effectively 0 downtime? No. Building indexes takes time and will lock the tables until the transaction is done. Yours, Laurenz Albe -- Sent via pgsql-general mailing list

Re: [GENERAL] LDAP authentication without OU in ldapbasedn

2017-07-14 Thread Gregory Nicol
Simple bind mode works nicely. Thank you. From: Jeff Janes [mailto:jeff.ja...@gmail.com] Sent: 14 July 2017 03:55 To: Gregory Nicol Cc: pgsql-general@postgresql.org Subject: Re: [GENERAL] LDAP authentication without OU in ldapbasedn On Thu, Jul 13, 2017 at 2:46 AM,