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Fix thinko in previous patch to always update pg_class.reltuples/relpages.

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I mis-simplified the test where ANALYZE decided if it could get away
without doing anything: under the new regime, that's never allowed.  Per
bug #6068 from Jeff Janes.  Back-patch to 8.4, just like previous patch.
This commit is contained in:
Tom Lane 2011-06-19 14:01:05 -04:00
parent 334c608f2c
commit 4473b63586
1 changed files with 2 additions and 15 deletions
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17
src/backend/commands/analyze.c
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@ -114,7 +114,6 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt, BufferAccessStrategy bstrategy)
Relation *Irel;
int nindexes;
bool hasindex;
bool analyzableindex;
VacAttrStats **vacattrstats;
AnlIndexData *indexdata;
int targrows,
@ -300,7 +299,6 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt, BufferAccessStrategy bstrategy)
vac_open_indexes(onerel, AccessShareLock, &nindexes, &Irel);
hasindex = (nindexes > 0);
indexdata = NULL;
analyzableindex = false;
if (hasindex)
{
indexdata = (AnlIndexData *) palloc0(nindexes * sizeof(AnlIndexData));
@ -347,10 +345,7 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt, BufferAccessStrategy bstrategy)
thisdata->vacattrstats[tcnt] =
examine_attribute(Irel[ind], i + 1);
if (thisdata->vacattrstats[tcnt] != NULL)
{
tcnt++;
analyzableindex = true;
}
}
}
thisdata->attr_cnt = tcnt;
@ -358,16 +353,11 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt, BufferAccessStrategy bstrategy)
}
}
/*
* Quit if no analyzable columns.
*/
if (attr_cnt <= 0 && !analyzableindex)
goto cleanup;
/*
* Determine how many rows we need to sample, using the worst case from
* all analyzable columns. We use a lower bound of 100 rows to avoid
* possible overflow in Vitter's algorithm.
* possible overflow in Vitter's algorithm. (Note: that will also be
* the target in the corner case where there are no analyzable columns.)
*/
targrows = 100;
for (i = 0; i < attr_cnt; i++)
@ -477,9 +467,6 @@ analyze_rel(Oid relid, VacuumStmt *vacstmt, BufferAccessStrategy bstrategy)
}
}
/* We skip to here if there were no analyzable columns */
cleanup:
/* If this isn't part of VACUUM ANALYZE, let index AMs do cleanup */
if (!vacstmt->vacuum)
{