hi,Bruce Momjian
I think you are wrong. multiple query in a string, such as ""SELECT;SELECT" will invoke pg_execute_query_string twice,
Itwon't generate two parsetree.
======= 2003-03-26 10:20:00 您在来信中写道：=======
>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_list的元素parsetree){ //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_list中的每个querytree){ //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
>>
>>
>> ---------------------------(end of broadcast)---------------------------
>> TIP 5: Have you checked our extensive FAQ?
>>
>> http://www.postgresql.org/docs/faqs/FAQ.html
>>
>
>--
> Bruce Momjian | http://candle.pha.pa.us
> pgman@candle.pha.pa.us | (610) 359-1001
> + If your life is a hard drive, | 13 Roberts Road
> + Christ can be your backup. | Newtown Square, Pennsylvania 19073
>
>.
= = = = = = = = = = = = = = = = = = = =
