Обсуждение: PREPARE dynamic SQL in plpgsql
Hi,
Does someone know how to prepare a synamic SQL statement in plpgsql?
All the examples, PG documents describe only about preparing static SQL statement.
Thank you;
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Koichi Suzuki
Koichi Suzuki
Hi,Does someone know how to prepare a synamic SQL statement in plpgsql?All the examples, PG documents describe only about preparing static SQL statement.
You might want to rephrase the question. From the pl/pgsql documentation:
"Note: The PL/pgSQL EXECUTE statement is not related to the EXECUTE SQL statement supported by the PostgreSQL server. The server's EXECUTE statement cannot be used directly within PL/pgSQL functions (and is not needed)."
So even if you could SQL-PREPARE you wouldn't be able to execute it.
The linked section describes how to construct and execute dynamic queries in pl/pgsql. The short answer is you create variable of type text and then EXECUTE it.
stmt := format('SELECT * FROM %i', in_tbl_name);
EXECUTE stmt [...]
David J.
Hi,Does someone know how to prepare a synamic SQL statement in plpgsql?All the examples, PG documents describe only about preparing static SQL statement.
This is not an appropriate question for the -hackers list. It is better asked on either -general or, more correctly, -novice.
It is also somewhat lacking in detail - including an example of what you've tried or read would be a nice touch.
David J.