Re: inquiry

Jinqiang Han wrote:
> hello,
>
> I have read the source code of postgres.c. Two strang things I can't understand.
> Souce code of Postgres.c:
> ..
> Foreach(parsetree_listparsetree){ //In what situation here will be many parsetrees
>

You can send multiple queries in a single string, "SELECT;SELECT".

> (List *)querytree_list = pg_analyze_and_rewrite(parsetree);
> foreach(querytree_listquerytree){ //In what situation here will be many querytrees

A RULE may have additional queries to fire.

>
> Who can tell me the reason?
> Thank you very much
>
> Jinqiang Han
>
>
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