database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-18 17:42:25 +03:00
Code Activity

Document PERFORM limitation when using WITH queries.

Browse Source 
Backpatch to 9.0 and 9.1.

Report from depstein@alliedtesting.com.
This commit is contained in:
Bruce Momjian
2011-09-06 13:41:32 -04:00
parent 0154332951
commit dcc728eef4
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
doc/src/sgml/plpgsql.sgml
View File

@ -845,6 +845,9 @@ PERFORM <replaceable>query</replaceable>;
result. Write the <replaceable>query</replaceable> the same
way you would write an SQL <command>SELECT</> command, but replace the
initial keyword <command>SELECT</> with <command>PERFORM</command>.
For <keyword>WITH</> queries, use <keyword>PERFORM</> and then
place the query in parentheses. (In this case, the query can only
return one row.)
<application>PL/pgSQL</application> variables will be
substituted into the query just as for commands that return no result,
and the plan is cached in the same way. Also, the special variable