[GENERAL] OLAP
Hi all, At work we have a system that's built on top of a proprietary OLAP database system (Rocket Gentia). We're looking into replacing that system with something that's still supported and in such a way that we can also access the data from our reporting software (WebFOCUS by information builders). Because I'm always advocating PG, I was asked whether PG would be suitable for this, but I'm not really familiar enough with OLAP databases to be able to comment on that. I got three prerequisites for a solution, namely: 1. It must contain correct information, 2. It must be fast and 3. It must be easy to maintain the data and the models; that's a task for a 3rd party back-end application, but it would be helpful to be able to name something to the higher-ups. Next to that, because we're also going to access the system using our reporting software (which is read-only access), it would be best if the entire data model and all the business rules are stored inside the database so that we're looking at the data in the same way that the back-end sees it. For size, we're looking at about 20 years of sales and shipment data all over the world (although mostly in Europe) for about 5mln sold products per year. I suspect there might be some middleware that handles the models and dimensions and stuff and manages triggers on relational tables in PG or a setup like that. I've seen an old reference to Cybertec OLAP, but they don't seem to carry a product like that if I watch their site. I'm looking for suggestions for something that would be able to do this. Cheers, Alban. -- If you can't see the forest for the trees, Cut the trees and you'll see there is no forest.
Re: [GENERAL] OLAP
Hi Alban, I think Postgres works great for OLAP work, and Amazon's Red Shift is even based on Postgres. 100 million sales should be not problem at all. My understanding is Greenplum also builds on top of Postgres, so if you ever do outgrow your Postgres installation, that would be an easy migration path. One Postgres OLAP tool to consider is Pentaho. That will save you lots of time around ETL, ad-hoc reporting, and other standard OLAP functionality. Good luck! Paul On Tue, Aug 27, 2013 at 8:12 AM, Alban Hertroys haram...@gmail.com wrote: Hi all, At work we have a system that's built on top of a proprietary OLAP database system (Rocket Gentia). We're looking into replacing that system with something that's still supported and in such a way that we can also access the data from our reporting software (WebFOCUS by information builders). Because I'm always advocating PG, I was asked whether PG would be suitable for this, but I'm not really familiar enough with OLAP databases to be able to comment on that. I got three prerequisites for a solution, namely: 1. It must contain correct information, 2. It must be fast and 3. It must be easy to maintain the data and the models; that's a task for a 3rd party back-end application, but it would be helpful to be able to name something to the higher-ups. Next to that, because we're also going to access the system using our reporting software (which is read-only access), it would be best if the entire data model and all the business rules are stored inside the database so that we're looking at the data in the same way that the back-end sees it. For size, we're looking at about 20 years of sales and shipment data all over the world (although mostly in Europe) for about 5mln sold products per year. I suspect there might be some middleware that handles the models and dimensions and stuff and manages triggers on relational tables in PG or a setup like that. I've seen an old reference to Cybertec OLAP, but they don't seem to carry a product like that if I watch their site. I'm looking for suggestions for something that would be able to do this. Cheers, Alban. -- If you can't see the forest for the trees, Cut the trees and you'll see there is no forest. -- _ Pulchritudo splendor veritatis. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] OLAP
On Aug 27, 2013, at 19:07, Paul Jungwirth p...@illuminatedcomputing.com wrote: Hi Alban, I think Postgres works great for OLAP work What do you base that on? I don't really doubt that the database layer is up to the task, I'm much more worried about maintaining the model and the cube data and all that typical OLAP stuff that I've mostly just heard about. , and Amazon's Red Shift is even based on Postgres. 100 million sales should be not problem at all. My understanding is Greenplum also builds on top of Postgres, so if you ever do outgrow your Postgres installation, that would be an easy migration path. What's the benefit of GreenPlum for OLAP? Isn't it a columnar database? And a pretty old fork of Postgres at that? GreenPlum has a pretty steep price-tag too. I didn't really look into Red Shift, perhaps I should… Anyway, I'm not at all sure I want to use some product that's heavily modified from Postgres. If it is, it has to be really really good. One Postgres OLAP tool to consider is Pentaho. That will save you lots of time around ETL, ad-hoc reporting, and other standard OLAP functionality. How is Pentaho an OLAP tool? Aren't you mixing up a few things? We already use Pentaho for ETL, so I'm a bit familiar with it. Why do you consider it suitable for managing an OLAP database? How would Pentaho manage cube rollup triggers, business models, dimensions and stuff like that? We don't want to hand code those, that's far too error-prone and far too much work to keep track of. That stuff needs to be automated, preferably similar to what we're used to from Gentia (well, not me - I can't make heads or tails of Gentia, but the person who asked me about PG's suitability has been developing with it for years). That's what we're comparing to. Unfortunately, I can't find any decent information about Gentia for reference. Apparently these days they're all about NoSQL databases and such. That's not what we have - I guess the clunky GUI is a hint that it's something of the past... BTW, please don't top-post. On Tue, Aug 27, 2013 at 8:12 AM, Alban Hertroys haram...@gmail.com wrote: Hi all, At work we have a system that's built on top of a proprietary OLAP database system (Rocket Gentia). We're looking into replacing that system with something that's still supported and in such a way that we can also access the data from our reporting software (WebFOCUS by information builders). Because I'm always advocating PG, I was asked whether PG would be suitable for this, but I'm not really familiar enough with OLAP databases to be able to comment on that. I got three prerequisites for a solution, namely: 1. It must contain correct information, 2. It must be fast and 3. It must be easy to maintain the data and the models; that's a task for a 3rd party back-end application, but it would be helpful to be able to name something to the higher-ups. Next to that, because we're also going to access the system using our reporting software (which is read-only access), it would be best if the entire data model and all the business rules are stored inside the database so that we're looking at the data in the same way that the back-end sees it. For size, we're looking at about 20 years of sales and shipment data all over the world (although mostly in Europe) for about 5mln sold products per year. I suspect there might be some middleware that handles the models and dimensions and stuff and manages triggers on relational tables in PG or a setup like that. I've seen an old reference to Cybertec OLAP, but they don't seem to carry a product like that if I watch their site. I'm looking for suggestions for something that would be able to do this. Cheers, Alban. -- If you can't see the forest for the trees, Cut the trees and you'll see there is no forest. -- _ Pulchritudo splendor veritatis. Alban Hertroys -- If you can't see the forest for the trees, cut the trees and you'll find there is no forest. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] OLAP
Alban Hertroys haram...@gmail.com writes: On Aug 27, 2013, at 19:07, Paul Jungwirth p...@illuminatedcomputing.com wrote: Hi Alban, I think Postgres works great for OLAP work What do you base that on? I don't really doubt that the database layer is up to the task, I'm much more worried about maintaining the model and the cube data and all that typical OLAP stuff that I've mostly just heard about. , and Amazon's Red Shift is even based on Postgres. 100 million sales should be not problem at all. My understanding is Greenplum also builds on top of Postgres, so if you ever do outgrow your Postgres installation, that would be an easy migration path. What's the benefit of GreenPlum for OLAP? Isn't it a columnar database? And a pretty old fork of Postgres at that? GreenPlum has a pretty steep price-tag too. Vertica is another case of an analytics focused platform that dirived from Postgres, version 8.0 IIRC. It was, by the time I first looked at it back about 4 years ago, only superficially resembling Postgres. Performance was absolutely shocking in terms of how quickly it processed queries over certain kinds of data... and for which the set of expected queries to be run over same was identifiable in advance. Sample queries are given to a moddeler which in turn creates a set of projections which are physical manifestations of the backend storage intended to optimize for this specialized workload. Vertica and I presume Green Plumb are *not* well suited for an OLTP role so it takes a fair amount of learning to make good use of them. Just FWIW. I didn't really look into Red Shift, perhaps I should Anyway, I'm not at all sure I want to use some product that's heavily modified from Postgres. If it is, it has to be really really good. One Postgres OLAP tool to consider is Pentaho. That will save you lots of time around ETL, ad-hoc reporting, and other standard OLAP functionality. How is Pentaho an OLAP tool? Aren't you mixing up a few things? We already use Pentaho for ETL, so I'm a bit familiar with it. Why do you consider it suitable for managing an OLAP database? How would Pentaho manage cube rollup triggers, business models, dimensions and stuff like that? We don't want to hand code those, that's far too error-prone and far too much work to keep track of. That stuff needs to be automated, preferably similar to what we're used to from Gentia (well, not me - I can't make heads or tails of Gentia, but the person who asked me about PG's suitability has been developing with it for years). That's what we're comparing to. Unfortunately, I can't find any decent information about Gentia for reference. Apparently these days they're all about NoSQL databases and such. That's not what we have - I guess the clunky GUI is a hint that it's something of the past... BTW, please don't top-post. On Tue, Aug 27, 2013 at 8:12 AM, Alban Hertroys haram...@gmail.com wrote: Hi all, At work we have a system that's built on top of a proprietary OLAP database system (Rocket Gentia). We're looking into replacing that system with something that's still supported and in such a way that we can also access the data from our reporting software (WebFOCUS by information builders). Because I'm always advocating PG, I was asked whether PG would be suitable for this, but I'm not really familiar enough with OLAP databases to be able to comment on that. I got three prerequisites for a solution, namely: 1. It must contain correct information, 2. It must be fast and 3. It must be easy to maintain the data and the models; that's a task for a 3rd party back-end application, but it would be helpful to be able to name something to the higher-ups. Next to that, because we're also going to access the system using our reporting software (which is read-only access), it would be best if the entire data model and all the business rules are stored inside the database so that we're looking at the data in the same way that the back-end sees it. For size, we're looking at about 20 years of sales and shipment data all over the world (although mostly in Europe) for about 5mln sold products per year. I suspect there might be some middleware that handles the models and dimensions and stuff and manages triggers on relational tables in PG or a setup like that. I've seen an old reference to Cybertec OLAP, but they don't seem to carry a product like that if I watch their site. I'm looking for suggestions for something that would be able to do this. Cheers, Alban. -- If you can't see the forest for the trees, Cut the trees and you'll see there is no forest. -- _ Pulchritudo splendor veritatis. Alban Hertroys -- If you can't see the forest for the trees, cut the trees and you'll find there is no forest. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your
Re: [GENERAL] OLAP
Dne 28. 8. 2013 0:05 Jerry Sievers gsiever...@comcast.net napsal(a): Alban Hertroys haram...@gmail.com writes: On Aug 27, 2013, at 19:07, Paul Jungwirth p...@illuminatedcomputing.com wrote: Hi Alban, I think Postgres works great for OLAP work What do you base that on? I don't really doubt that the database layer is up to the task, I'm much more worried about maintaining the model and the cube data and all that typical OLAP stuff that I've mostly just heard about. , and Amazon's Red Shift is even based on Postgres. 100 million sales should be not problem at all. My understanding is Greenplum also builds on top of Postgres, so if you ever do outgrow your Postgres installation, that would be an easy migration path. What's the benefit of GreenPlum for OLAP? Isn't it a columnar database? And a pretty old fork of Postgres at that? GreenPlum has a pretty steep price-tag too. Vertica is another case of an analytics focused platform that dirived from Postgres, version 8.0 IIR vertica use a similar interface, but internally use nothing from pg. it was written from zero. It was, by the time I first looked at it back about 4 years ago, only superficially resembling Postgres. Performance was absolutely shocking in terms of how quickly it processed queries over certain kinds of data... and for which the set of expected queries to be run over same was identifiable in advance. Sample queries are given to a moddeler which in turn creates a set of projections which are physical manifestations of the backend storage intended to optimize for this specialized workload. Vertica and I presume Green Plumb are *not* well suited for an OLTP role so it takes a fair amount of learning to make good use of them. Just FWIW. I didn't really look into Red Shift, perhaps I should… Anyway, I'm not at all sure I want to use some product that's heavily modified from Postgres. If it is, it has to be really really good. One Postgres OLAP tool to consider is Pentaho. That will save you lots of time around ETL, ad-hoc reporting, and other standard OLAP functionality. How is Pentaho an OLAP tool? Aren't you mixing up a few things? We already use Pentaho for ETL, so I'm a bit familiar with it. Why do you consider it suitable for managing an OLAP database? How would Pentaho manage cube rollup triggers, business models, dimensions and stuff like that? We don't want to hand code those, that's far too error-prone and far too much work to keep track of. That stuff needs to be automated, preferably similar to what we're used to from Gentia (well, not me - I can't make heads or tails of Gentia, but the person who asked me about PG's suitability has been developing with it for years). That's what we're comparing to. Unfortunately, I can't find any decent information about Gentia for reference. Apparently these days they're all about NoSQL databases and such. That's not what we have - I guess the clunky GUI is a hint that it's something of the past... BTW, please don't top-post. On Tue, Aug 27, 2013 at 8:12 AM, Alban Hertroys haram...@gmail.com wrote: Hi all, At work we have a system that's built on top of a proprietary OLAP database system (Rocket Gentia). We're looking into replacing that system with something that's still supported and in such a way that we can also access the data from our reporting software (WebFOCUS by information builders). Because I'm always advocating PG, I was asked whether PG would be suitable for this, but I'm not really familiar enough with OLAP databases to be able to comment on that. I got three prerequisites for a solution, namely: 1. It must contain correct information, 2. It must be fast and 3. It must be easy to maintain the data and the models; that's a task for a 3rd party back-end application, but it would be helpful to be able to name something to the higher-ups. Next to that, because we're also going to access the system using our reporting software (which is read-only access), it would be best if the entire data model and all the business rules are stored inside the database so that we're looking at the data in the same way that the back-end sees it. For size, we're looking at about 20 years of sales and shipment data all over the world (although mostly in Europe) for about 5mln sold products per year. I suspect there might be some middleware that handles the models and dimensions and stuff and manages triggers on relational tables in PG or a setup like that. I've seen an old reference to Cybertec OLAP, but they don't seem to carry a product like that if I watch their site. I'm looking for suggestions for something that would be able to do this. Cheers, Alban. -- If you can't see the forest for the trees, Cut the trees and you'll see there is no forest. -- _ Pulchritudo splendor veritatis.
Re: [GENERAL] OLAP
according to what you write pentaho best fits your needs On Tue, Aug 27, 2013 at 5:52 PM, Pavel Stehule pavel.steh...@gmail.comwrote: Dne 28. 8. 2013 0:05 Jerry Sievers gsiever...@comcast.net napsal(a): Alban Hertroys haram...@gmail.com writes: On Aug 27, 2013, at 19:07, Paul Jungwirth p...@illuminatedcomputing.com wrote: Hi Alban, I think Postgres works great for OLAP work What do you base that on? I don't really doubt that the database layer is up to the task, I'm much more worried about maintaining the model and the cube data and all that typical OLAP stuff that I've mostly just heard about. , and Amazon's Red Shift is even based on Postgres. 100 million sales should be not problem at all. My understanding is Greenplum also builds on top of Postgres, so if you ever do outgrow your Postgres installation, that would be an easy migration path. What's the benefit of GreenPlum for OLAP? Isn't it a columnar database? And a pretty old fork of Postgres at that? GreenPlum has a pretty steep price-tag too. Vertica is another case of an analytics focused platform that dirived from Postgres, version 8.0 IIR vertica use a similar interface, but internally use nothing from pg. it was written from zero. It was, by the time I first looked at it back about 4 years ago, only superficially resembling Postgres. Performance was absolutely shocking in terms of how quickly it processed queries over certain kinds of data... and for which the set of expected queries to be run over same was identifiable in advance. Sample queries are given to a moddeler which in turn creates a set of projections which are physical manifestations of the backend storage intended to optimize for this specialized workload. Vertica and I presume Green Plumb are *not* well suited for an OLTP role so it takes a fair amount of learning to make good use of them. Just FWIW. I didn't really look into Red Shift, perhaps I should… Anyway, I'm not at all sure I want to use some product that's heavily modified from Postgres. If it is, it has to be really really good. One Postgres OLAP tool to consider is Pentaho. That will save you lots of time around ETL, ad-hoc reporting, and other standard OLAP functionality. How is Pentaho an OLAP tool? Aren't you mixing up a few things? We already use Pentaho for ETL, so I'm a bit familiar with it. Why do you consider it suitable for managing an OLAP database? How would Pentaho manage cube rollup triggers, business models, dimensions and stuff like that? We don't want to hand code those, that's far too error-prone and far too much work to keep track of. That stuff needs to be automated, preferably similar to what we're used to from Gentia (well, not me - I can't make heads or tails of Gentia, but the person who asked me about PG's suitability has been developing with it for years). That's what we're comparing to. Unfortunately, I can't find any decent information about Gentia for reference. Apparently these days they're all about NoSQL databases and such. That's not what we have - I guess the clunky GUI is a hint that it's something of the past... BTW, please don't top-post. On Tue, Aug 27, 2013 at 8:12 AM, Alban Hertroys haram...@gmail.com wrote: Hi all, At work we have a system that's built on top of a proprietary OLAP database system (Rocket Gentia). We're looking into replacing that system with something that's still supported and in such a way that we can also access the data from our reporting software (WebFOCUS by information builders). Because I'm always advocating PG, I was asked whether PG would be suitable for this, but I'm not really familiar enough with OLAP databases to be able to comment on that. I got three prerequisites for a solution, namely: 1. It must contain correct information, 2. It must be fast and 3. It must be easy to maintain the data and the models; that's a task for a 3rd party back-end application, but it would be helpful to be able to name something to the higher-ups. Next to that, because we're also going to access the system using our reporting software (which is read-only access), it would be best if the entire data model and all the business rules are stored inside the database so that we're looking at the data in the same way that the back-end sees it. For size, we're looking at about 20 years of sales and shipment data all over the world (although mostly in Europe) for about 5mln sold products per year. I suspect there might be some middleware that handles the models and dimensions and stuff and manages triggers on relational tables in PG or a setup like that. I've seen an old reference to Cybertec OLAP, but they don't seem to carry a product like that if I watch their site. I'm
Re: [GENERAL] OLAP
Checkout the Saiku, the future of Open Source Interactive OLAP( http://analytical-labs.com ) On Tue, Aug 27, 2013 at 8:34 PM, Carlos Saritama cssarit...@gmail.comwrote: according to what you write pentaho best fits your needs On Tue, Aug 27, 2013 at 5:52 PM, Pavel Stehule pavel.steh...@gmail.comwrote: Dne 28. 8. 2013 0:05 Jerry Sievers gsiever...@comcast.net napsal(a): Alban Hertroys haram...@gmail.com writes: On Aug 27, 2013, at 19:07, Paul Jungwirth p...@illuminatedcomputing.com wrote: Hi Alban, I think Postgres works great for OLAP work What do you base that on? I don't really doubt that the database layer is up to the task, I'm much more worried about maintaining the model and the cube data and all that typical OLAP stuff that I've mostly just heard about. , and Amazon's Red Shift is even based on Postgres. 100 million sales should be not problem at all. My understanding is Greenplum also builds on top of Postgres, so if you ever do outgrow your Postgres installation, that would be an easy migration path. What's the benefit of GreenPlum for OLAP? Isn't it a columnar database? And a pretty old fork of Postgres at that? GreenPlum has a pretty steep price-tag too. Vertica is another case of an analytics focused platform that dirived from Postgres, version 8.0 IIR vertica use a similar interface, but internally use nothing from pg. it was written from zero. It was, by the time I first looked at it back about 4 years ago, only superficially resembling Postgres. Performance was absolutely shocking in terms of how quickly it processed queries over certain kinds of data... and for which the set of expected queries to be run over same was identifiable in advance. Sample queries are given to a moddeler which in turn creates a set of projections which are physical manifestations of the backend storage intended to optimize for this specialized workload. Vertica and I presume Green Plumb are *not* well suited for an OLTP role so it takes a fair amount of learning to make good use of them. Just FWIW. I didn't really look into Red Shift, perhaps I should… Anyway, I'm not at all sure I want to use some product that's heavily modified from Postgres. If it is, it has to be really really good. One Postgres OLAP tool to consider is Pentaho. That will save you lots of time around ETL, ad-hoc reporting, and other standard OLAP functionality. How is Pentaho an OLAP tool? Aren't you mixing up a few things? We already use Pentaho for ETL, so I'm a bit familiar with it. Why do you consider it suitable for managing an OLAP database? How would Pentaho manage cube rollup triggers, business models, dimensions and stuff like that? We don't want to hand code those, that's far too error-prone and far too much work to keep track of. That stuff needs to be automated, preferably similar to what we're used to from Gentia (well, not me - I can't make heads or tails of Gentia, but the person who asked me about PG's suitability has been developing with it for years). That's what we're comparing to. Unfortunately, I can't find any decent information about Gentia for reference. Apparently these days they're all about NoSQL databases and such. That's not what we have - I guess the clunky GUI is a hint that it's something of the past... BTW, please don't top-post. On Tue, Aug 27, 2013 at 8:12 AM, Alban Hertroys haram...@gmail.com wrote: Hi all, At work we have a system that's built on top of a proprietary OLAP database system (Rocket Gentia). We're looking into replacing that system with something that's still supported and in such a way that we can also access the data from our reporting software (WebFOCUS by information builders). Because I'm always advocating PG, I was asked whether PG would be suitable for this, but I'm not really familiar enough with OLAP databases to be able to comment on that. I got three prerequisites for a solution, namely: 1. It must contain correct information, 2. It must be fast and 3. It must be easy to maintain the data and the models; that's a task for a 3rd party back-end application, but it would be helpful to be able to name something to the higher-ups. Next to that, because we're also going to access the system using our reporting software (which is read-only access), it would be best if the entire data model and all the business rules are stored inside the database so that we're looking at the data in the same way that the back-end sees it. For size, we're looking at about 20 years of sales and shipment data all over the world (although mostly in Europe) for about 5mln sold products per year. I suspect there might be some middleware that handles the models and dimensions and stuff and manages triggers on relational
Re: [GENERAL] OLAP
Alban Hertroys-4 wrote How is Pentaho an OLAP tool? Aren't you mixing up a few things? We already use Pentaho for ETL, so I'm a bit familiar with it. Why do you consider it suitable for managing an OLAP database? How would Pentaho manage cube rollup triggers, business models, dimensions and stuff like that? We don't want to hand code those, that's far too error-prone and far too much work to keep track of. That stuff needs to be automated, preferably similar to what we're used to from Gentia (well, not me - I can't make heads or tails of Gentia, but the person who asked me about PG's suitability has been developing with it for years). That's what we're comparing to. Pentaho, Jasper and Actuate are the common OLAP tools. Pentahos' ETL tool (Kettle) is more popular than their Reporting solution. Similarly, Jasper's reporting tool is more popular than their ETL (they integrate talend). The OLAP functionality in both come from Mondrian, as far as I know. The cubes, dimensions etc can be defined using a UI tool and uploaded to the reporting server - either Jasper or Pentaho. These typically support MDX, in addition to standard SQL. http://en.wikipedia.org/wiki/MultiDimensional_eXpressions -- View this message in context: http://postgresql.1045698.n5.nabble.com/OLAP-tp5768698p5768782.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] OLAP
On Tue, Aug 27, 2013 at 3:04 PM, Jerry Sievers gsiever...@comcast.netwrote: Vertica is another case of an analytics focused platform that dirived from Postgres, version 8.0 IIRC. FWIW, You might be thinking of Greenplum, and I think it forked from pg 8.1. Vertica was built from scratch, it is not using Postgres as the basis for the db. This is according to the engineers that I have spoken to in the past at Vertica. I believe there was some code ported over for their command line client vsql, but I could be wrong about that. At the very least, vsql looks and acts like psql from a user's point of view. I agree absolutely with you about the dazzling speed of certain types of queries -- one of my tests was a simple aggregate query (a bunch of SUM() and GROUP BY's) over about 500M rows and it returned results in a handful of seconds. The same query in our Postgresql server with 2x the number of disks took handfuls of minutes IIRC. On the flip side, I found some of the complex Window functions performed on par or better in Postgresql than in Vertica.
[GENERAL] OLAP with PostgreSQL
Hi, I am a student and I want to create Multidimensional Data Cubes -OLAP- with PostgreSQL. Is it possible? I have a relational database on PostgreSQL and it contains many records. I want to create an OLAP Cube from the records. And want to drill-down and drill-up operations on this cube. But how, I dont know :) any suggestion?? -- Best regards, Adem mailto:[EMAIL PROTECTED] --- --Bu mail Antivirus taramasindan gecmistir. --This e-mail was scanned by Antivirus. ---(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: [GENERAL] OLAP with PostgreSQL
On Wed, 2005-05-18 at 12:46, Adem HUR wrote: Hi, I am a student and I want to create Multidimensional Data Cubes -OLAP- with PostgreSQL. Is it possible? I have a relational database on PostgreSQL and it contains many records. I want to create an OLAP Cube from the records. And want to drill-down and drill-up operations on this cube. But how, I dont know :) Do a google search for postgresql data cube and hit I'm feeling lucky It should point you to EFEU... ---(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
