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Allow compute_query_id to be set to 'auto' and make it default

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Allowing only on/off meant that all either all existing configuration
guides would become obsolete if we disabled it by default, or that we
would have to accept a performance loss in the default config if we
enabled it by default.  By allowing 'auto' as a middle ground, the
performance cost is only paid by those who enable pg_stat_statements and
similar modules.

I only edited the release notes to comment-out a paragraph that is now
factually wrong; further edits are probably needed to describe the
related change in more detail.

Author: Julien Rouhaud <rjuju123@gmail.com>
Reviewed-by: Justin Pryzby <pryzby@telsasoft.com>
Discussion: https://postgr.es/m/20210513002623.eugftm4nk2lvvks3@nol
This commit is contained in:
Alvaro Herrera
2021-05-15 14:13:09 -04:00
parent 30d8bad494
commit cafde58b33
14 changed files with 108 additions and 30 deletions
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4
src/backend/parser/analyze.c
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@@ -124,7 +124,7 @@ parse_analyze(RawStmt *parseTree, const char *sourceText,
query = transformTopLevelStmt(pstate, parseTree);
if (compute_query_id)
if (IsQueryIdEnabled())
jstate = JumbleQuery(query, sourceText);
if (post_parse_analyze_hook)
@@ -163,7 +163,7 @@ parse_analyze_varparams(RawStmt *parseTree, const char *sourceText,
/* make sure all is well with parameter types */
check_variable_parameters(pstate, query);
if (compute_query_id)
if (IsQueryIdEnabled())
jstate = JumbleQuery(query, sourceText);
if (post_parse_analyze_hook)