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Teach btree to handle ScalarArrayOpExpr quals natively.

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This allows "indexedcol op ANY(ARRAY[...])" conditions to be used in plain
indexscans, and particularly in index-only scans.
This commit is contained in:
Tom Lane
2011-10-16 15:39:24 -04:00
parent 0898d71f66
commit 9e8da0f757
13 changed files with 726 additions and 129 deletions
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7
src/backend/utils/adt/selfuncs.c
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@ -6385,14 +6385,7 @@ btcostestimate(PG_FUNCTION_ARGS)
* is that multiple columns dilute the importance of the first column's
* ordering, but don't negate it entirely. Before 8.0 we divided the
* correlation by the number of columns, but that seems too strong.)
*
* We can skip all this if we found a ScalarArrayOpExpr, because then the
* call must be for a bitmap index scan, and the caller isn't going to
* care what the index correlation is.
*/
if (found_saop)
PG_RETURN_VOID();
MemSet(&vardata, 0, sizeof(vardata));
if (index->indexkeys[0] != 0)