Aasmund Midttun Godal wrote:
> Erm, sorry about the multiple postings, I just discovered a couple of interesting tidbits after I posted first...
>
> http://www.postgresql.org/idocs/index.php?plpgsql.html :
>
> "The PL/pgSQL call handler parses the function's source text and produces an internal binary instruction tree the
firsttime the function is called."
And that is still not entirely accurate. At the first function call the control language (IF, WHEN,
etc.) is parsed. All expressions and queries are just remembered as strings with variables replaced by $n
parameters. Now every statement will prepare a saved plan the first time it is hit.
So when you have a function with conditional code and a specific branch of that code is never called, the
statements in there will never be prepared.
Jan
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