Обсуждение: SQL/PSM implemenation for PostgreSQL (roadmap)
Hello, I am work on implementation of SQL/PSM language for PostgreSQL. You can see first results on http://postgresql.interweb.cz/index.php/SQL/PSM . My goal is creating of referential implementation and using it mainly for education and colecting informations about language (documentation, regress tests, ...). Implementation is based on plpgsql runtime. I haven't necessary knowleages for total rewriting any language runtime, and current runtime is sufficient for my goals. I don't belive so rewriting runtime can has adequate benefit. Runtime can be lighter and cleaner only with some support in core. It's reason so this project is external pgfoundry project. This implementation has PostgreSQL specific. Don't support procedures and CALL statement. Don't support unbounded SELECTs. Don't support NOT ATOMIC block. More on http://postgresql.interweb.cz/index.php/SQL/PSM Roadmap: * implement completed functionality (two weeks) * testing and cleaning (regress tests) (february) * documentation(april) I welcome any helpers, help, testers, suggestions, notes and comments. Best regards Pavel Stehule _________________________________________________________________ Citite se osamele? Poznejte nekoho vyjmecneho diky Match.com. http://www.msn.cz/
Am Montag, 4. Dezember 2006 13:09 schrieb Pavel Stehule: > I am work on implementation of SQL/PSM language for PostgreSQL. Do you have an analysis of the differences between PL/pgSQL and SQL/PSM? It seems they might be variants of the same language rather than separate implementations, but no one knows for sure. -- Peter Eisentraut http://developer.postgresql.org/~petere/
On 12/4/06, Pavel Stehule <pavel.stehule@hotmail.com> wrote: > I am work on implementation of SQL/PSM language for PostgreSQL. Pavel, I'd be glad to help ya on it. If you could let me know what you'd like me to work on, I'd be glad to start. -- Jonah H. Harris, Software Architect | phone: 732.331.1324 EnterpriseDB Corporation | fax: 732.331.1301 33 Wood Ave S, 3rd Floor | jharris@enterprisedb.com Iselin, New Jersey 08830 | http://www.enterprisedb.com/
>Am Montag, 4. Dezember 2006 13:09 schrieb Pavel Stehule: > > I am work on implementation of SQL/PSM language for PostgreSQL. > >Do you have an analysis of the differences between PL/pgSQL and SQL/PSM? >It >seems they might be variants of the same language rather than separate >implementations, but no one knows for sure. Some changes are cosmetic, and some not. You can see on current sql/psm runtime rewriting gram.y and minimal changes in other files. But this languages are really different. The mayor difference is in exception handling. The idea is total different. Individual chapter is sql/psm procedures and unbounded select. SQL/PSM propably don't need it, but current implementations support it. This has deeper reasons, one is different concept of return output sets in Oracle and Sybase based databases. I like this concept (unbounded selects) but it isn't part of sql/psm and it isn't current topic. What I had to solve. In sql/psm is sqlstate more important and designates level of error. In Postgresql sqlstate and error level are independent. Next, I can solve exception and warnings in sql/psm 3 diffirent ways. PostgreSQL and (PL/SQL) can handle only exception in one way. I belive so some procedures, can be shared, but current runtime use global variables which break sharing. Other are similar (semantic), but s syntax is total different. Please, see syntax for declare variables. I don't know history about SQL/PSM (know it anybody?) and I don't know why is sql/psm different from pl/sql. Older version of sql/psm was similar to oracle's language. Every RDBMS supports only subset of SQL/PSM (some parts are unspecified). Its main goal for me for now - create referential implementation. Next steps are far. You can belive, I can spent long time in searching of any sources for sql/psm. One is only and it is ISO/IEC 9075-4. Best regards Pavel Stehule _________________________________________________________________ Najdete si svou lasku a nove pratele na Match.com. http://www.msn.cz/
>On 12/4/06, Pavel Stehule <pavel.stehule@hotmail.com> wrote: >>I am work on implementation of SQL/PSM language for PostgreSQL. > >Pavel, > >I'd be glad to help ya on it. If you could let me know what you'd >like me to work on, I'd be glad to start. > Nice, thank you. I plan so in next week finish prototype on 80% (all important, moustly error handling). Then you can clean and synchronise code with me (gram.y use sql/psm domain names and others still pl/pgsql names). I am not able write documentation (my english is really stupid). Please, if you can, work on it. And, please, read and correct wiki (http://postgresql.interweb.cz/index.php/SQL/PSM ). I inwite any notes to implementation sql/psm in postgresql environment. What is your pgfoundry account? Next talks can be on plpsm-devel.pgfoundry.org or via ICQ: 138 051 654 Regards Pavel Stehule _________________________________________________________________ Emotikony a pozadi programu MSN Messenger ozivi vasi konverzaci. http://messenger.msn.cz/
Pavel, > I am not able write documentation (my english is really stupid). Please, > if you can, work on it. And, please, read and correct wiki > (http://postgresql.interweb.cz/index.php/SQL/PSM ). I inwite any notes > to implementation sql/psm in postgresql environment. I'd suggest writing documentation in Czech and getting it translated. We probably have more translators than people who know anything about PSM. A lot of the Sun database team is Czech; I can ask if they want to help. --Josh
>I am not able write documentation (my english is really stupid). >>Please, if you can, work on it. And, please, read and correct wiki >>(http://postgresql.interweb.cz/index.php/SQL/PSM ). I inwite any notes to >>implementation sql/psm in postgresql environment. > >I'd suggest writing documentation in Czech and getting it translated. We >probably have more translators than people who know anything about PSM. A >lot of the Sun database team is Czech; I can ask if they want to help. > It's good idea. Thank You Pavel _________________________________________________________________ Chcete sdilet sve obrazky a hudbu s prateli? http://messenger.msn.cz/
Hello, Now, you can test prototype or work on it. All details are on http://postgresql.interweb.cz/index.php/SQL/PSM . This version needs patched core files http://postgresql.interweb.cz/index.php/SQL/PSM#Patches_for_core You can find supported functionality on http://postgresql.interweb.cz/index.php/SQL/PSM#Supported_statements . Next week I should work on "for" and "get diagnostic" stmts implementation. There is a lot of work (please see ToDo and Errors sections). It's can be success if in you plpgpsm interpret will run. I plan take full functionality first and clean and refactorise source code later. Dificult part is exception handling :-(, because all postgresql stored rutines have to run under transaction, which standard doesn't expect. Please, use code from CVS. Best regards Pavel Stehule _________________________________________________________________ Emotikony a pozadi programu MSN Messenger ozivi vasi konverzaci. http://messenger.msn.cz/
On 12/17/06, Pavel Stehule <pavel.stehule@hotmail.com> wrote: > Now, you can test prototype or work on it. Cool. Good work Pavel. I'll play with it and some of my PSM code. I'll try and contact you via IM as to things I'd like to help with. -- Jonah H. Harris, Software Architect | phone: 732.331.1324 EnterpriseDB Corporation | fax: 732.331.1301 33 Wood Ave S, 3rd Floor | jharris@enterprisedb.com Iselin, New Jersey 08830 | http://www.enterprisedb.com/