Re: PL/pgSQL examples NOT involving functions

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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