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Message-ID: <e84231cb-4964-463c-a24c-061443de9bc9@aklaver.com>
Date: Sun, 23 Nov 2025 08:41:44 -0800
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Subject: Re: ODBC fails to recognize event trigger removal
To: Igor Korot <ikorot01@gmail.com>,
 "pgsql-generallists.postgresql.org" <pgsql-general@lists.postgresql.org>
References: 
 <CA+FnnTx0_jSe-aynLXMjrZhdBsSjw_mpCRP_cWH1oACo9=o2DA@mail.gmail.com>
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From: Adrian Klaver <adrian.klaver@aklaver.com>
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 <CA+FnnTx0_jSe-aynLXMjrZhdBsSjw_mpCRP_cWH1oACo9=o2DA@mail.gmail.com>
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On 11/23/25 04:44, Igor Korot wrote:
> Hi, ALL,
> 
> [code]
> postgres=# CREATE OR REPLACE FUNCTION __watch_schema_changes() RETURNS
> event_trigger LANGUAGE plpgsql AS $$ BEGIN NOTIFY tg_tag; END; $$;
> CREATE FUNCTION
> postgres=# CREATE EVENT TRIGGER schema_change_notify ON
> ddl_command_end WHEN TAG IN('CREATE TABLE', 'ALTER TABLE', 'DROP
> TABLE', 'CREATE INDEX', 'DROP INDEX') EXECUTE PROCEDURE
> __watch_schema_changes();
> CREATE EVENT TRIGGER
> postgres=# DROP EVENT TRIGGER schema_change_notify CASCADE;
> DROP EVENT TRIGGER
> postgres=# \q
> igor@WaylandGnome ~/unixODBC-2.3.12 $ isql postgres postgres wasqra123
> +---------------------------------------+
> | Connected!                            |
> |                                       |
> | sql-statement                         |
> | help [tablename]                      |
> | echo [string]                         |
> | quit                                  |
> |                                       |
> +---------------------------------------+
> SQL> CREATE OR REPLACE FUNCTION __watch_schema_changes() RETURNS
> event_trigger LANGUAGE plpgsql AS $$ BEGIN NOTIFY tg_tag; END; $$;
> SQLRowCount returns -1
> SQL> CREATE EVENT TRIGGER schema_change_notify ON ddl_command_end WHEN
> TAG IN('CREATE TABLE', 'ALTER TABLE', 'DROP TABLE', 'CREATE INDEX',
> 'DROP INDEX') EXECUTE PROCEDURE __watch_schema_changes();
> [ISQL]ERROR: Could not SQLExecute
> SQL> quit
> igor@WaylandGnome ~/unixODBC-2.3.12 $
> [/code]
> 
> Server version 16.2
> Driver version 11.1
> 
> Anybody aware of this?

1) There is a Postgres list dedicated to the ODBC driver:

https://www.postgresql.org/list/pgsql-odbc/

You should probably ask these sort of questions there.

2) I have to believe the below is the issue:

  Server version 16.2
  Driver version 11.1

Given that the most recent current driver is REL-17_00_0006 and from here:

https://github.com/postgresql-interfaces/psqlodbc/tree/REL-11_01_0000

The 11.1 driver was released 6 years ago which predates the release of 
Postgres 16 by ~4.5 years.

> 
> Thank you.
> 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com