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Doc: fix confusion about LEAKPROOF in syntax summaries.

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The syntax summaries for CREATE FUNCTION and allied commands
made it look like LEAKPROOF is an alternative to
IMMUTABLE/STABLE/VOLATILE, when of course it is an orthogonal
option.  Improve that.

Per gripe from aazamrafeeque0.  Thanks to David Johnston for
suggestions.

Discussion: https://postgr.es/m/162444349581.694.5818572718530259025@wrigleys.postgresql.org
This commit is contained in:
Tom Lane
2021-06-23 14:27:13 -04:00
parent 13f3655683
commit 9aa06956ea
3 changed files with 8 additions and 5 deletions
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7
doc/src/sgml/ref/create_function.sgml
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@ -28,9 +28,10 @@ CREATE [ OR REPLACE ] FUNCTION
{ LANGUAGE <replaceable class="parameter">lang_name</replaceable>
| TRANSFORM { FOR TYPE <replaceable class="parameter">type_name</replaceable> } [, ... ]
| WINDOW
| IMMUTABLE | STABLE | VOLATILE | [ NOT ] LEAKPROOF
| CALLED ON NULL INPUT | RETURNS NULL ON NULL INPUT | STRICT
| [ EXTERNAL ] SECURITY INVOKER | [ EXTERNAL ] SECURITY DEFINER
| { IMMUTABLE | STABLE | VOLATILE }
| [ NOT ] LEAKPROOF
| { CALLED ON NULL INPUT | RETURNS NULL ON NULL INPUT | STRICT }
| { [ EXTERNAL ] SECURITY INVOKER | [ EXTERNAL ] SECURITY DEFINER }
| PARALLEL { UNSAFE | RESTRICTED | SAFE }
| COST <replaceable class="parameter">execution_cost</replaceable>
| ROWS <replaceable class="parameter">result_rows</replaceable>