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Avoid possible divide-by-zero in gincostestimate.

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Per report from Jeff Janes.
This commit is contained in:
Tom Lane 2011-04-21 19:28:36 -04:00
parent a0e8df527e
commit 92647fc4b9
1 changed files with 4 additions and 0 deletions
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4
src/backend/utils/adt/selfuncs.c
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@ -6458,6 +6458,10 @@ gincostestimate(PG_FUNCTION_ARGS)
numDataPages = Min(numDataPages, numPages - numEntryPages); numDataPages = Min(numDataPages, numPages - numEntryPages);
} }
/* In an empty index, numEntries could be zero. Avoid divide-by-zero */
if (numEntries < 1)
numEntries = 1;
/* /*
* Include predicate in selectivityQuals (should match * Include predicate in selectivityQuals (should match
* genericcostestimate) * genericcostestimate)