Hi,
Parameterized queries (PREPARE/EXECUTE), is a great thing, but it would even be better if the DECLARE CURSOR could use a PREPAREd statement, to declare a "server-side" cursor with a parameterized query, to use the benefits of DECLAREd cursors (no fetching of all the result set on the client, use the binary mode, use the scrollable option or the FOR UPDATE option).
Something like:
PREPARE s1 (type,..) AS SELECT .... DECLARE c1 (value,...) CURSOR FROM s1 FETCH c1
or have a new OPEN instruction to pass parameters:
PREPARE s1 (type,..) AS SELECT .... DECLARE c1 CURSOR FROM s1 OPEN c1 USING (value,...) FETCH c1
That would be an incredible improvement to make PostgreSQL compete with other databases like Informix, Oracle, Db2 UDB, SQL Server (I wrote some drivers for these database servers).
For now we cannot use DECLARE CURSOR in our PostgreSQL driver because
of this limitation.... I could build the SQL statement with literal values, but since you have now parametrized queries I would prefer to use that...
Thank you!
Sebastien FLAESCH Database driver writer at www.4js.com
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