Hello 2012/3/21 Robert Haas <robertmh...@gmail.com>: > On Wed, Feb 22, 2012 at 4:19 PM, Pavel Stehule <pavel.steh...@gmail.com> > wrote: >> I propose to integrate a PSM language into the core. This language is >> defined as part of ANSI SQL - SQL/PSM and is used in some well known >> databases like DB2, Terradata and some other less known RDBMS like >> MonetDB. A The proposed implementation is based on the same >> architecture as the current PL/pgSQL interpreter - interpretation of >> AST with integration of an SQL parser and expression executor. Reasons >> why to use same architecture are: reuse some parts of interpreter and >> well experience with the current interpreter. > > Why not just enhance PL/pgsql
plpgsql is based on PL/SQL and it is ADA. PSM is relative unique language - similar to modula with one significant feature - handlers - so ADA and PSM are different languages with different syntax. I implemented a few statements from PSM to plpgsql in last years. But it is a maximum - we cannot change a syntax of declaration, handling errors or some control statements. The main issue is different exception handling in these languages - we cannot to isolate differences just in parser. Regards Pavel http://postgres.cz/wiki/Compound_statement > > -- > Robert Haas > EnterpriseDB: http://www.enterprisedb.com > The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
