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When VACUUM or ANALYZE skips a concurrently dropped table, log it.

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Hopefully, the additional logging will help avoid confusion that
could otherwise result.

Nathan Bossart, reviewed by Michael Paquier, Fabrízio Mello, and me
This commit is contained in:
Robert Haas
2017-12-04 15:23:36 -05:00
parent ecc27d55f4
commit ab6eaee884
6 changed files with 208 additions and 13 deletions
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46
src/backend/commands/analyze.c
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@ -120,6 +120,7 @@ analyze_rel(Oid relid, RangeVar *relation, int options,
int elevel;
AcquireSampleRowsFunc acquirefunc = NULL;
BlockNumber relpages = 0;
bool rel_lock = true;
/* Select logging level */
if (options & VACOPT_VERBOSE)
@ -149,15 +150,50 @@ analyze_rel(Oid relid, RangeVar *relation, int options,
else
{
onerel = NULL;
if (relation &&
IsAutoVacuumWorkerProcess() && params->log_min_duration >= 0)
ereport(LOG,
rel_lock = false;
}
/*
* If we failed to open or lock the relation, emit a log message before
* exiting.
*/
if (!onerel)
{
/*
* If the RangeVar is not defined, we do not have enough information
* to provide a meaningful log statement. Chances are that
* analyze_rel's caller has intentionally not provided this
* information so that this logging is skipped, anyway.
*/
if (relation == NULL)
return;
/*
* Determine the log level. For autovacuum logs, we emit a LOG if
* log_autovacuum_min_duration is not disabled. For manual ANALYZE,
* we emit a WARNING to match the log statements in the permissions
* checks.
*/
if (!IsAutoVacuumWorkerProcess())
elevel = WARNING;
else if (params->log_min_duration >= 0)
elevel = LOG;
else
return;
if (!rel_lock)
ereport(elevel,
(errcode(ERRCODE_LOCK_NOT_AVAILABLE),
errmsg("skipping analyze of \"%s\" --- lock not available",
relation->relname)));
}
if (!onerel)
else
ereport(elevel,
(errcode(ERRCODE_UNDEFINED_TABLE),
errmsg("skipping analyze of \"%s\" --- relation no longer exists",
relation->relname)));
return;
}
/*
* Check permissions --- this should match vacuum's check!