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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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11
src/backend/optimizer/path/costsize.c
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@@ -394,9 +394,14 @@ cost_index(IndexPath *path, PlannerInfo *root,
if (indexonly)
pages_fetched = ceil(pages_fetched * (1.0 - baserel->allvisfrac));
min_IO_cost = spc_random_page_cost;
if (pages_fetched > 1)
min_IO_cost += (pages_fetched - 1) * spc_seq_page_cost;
if (pages_fetched > 0)
{
min_IO_cost = spc_random_page_cost;
if (pages_fetched > 1)
min_IO_cost += (pages_fetched - 1) * spc_seq_page_cost;
}
else
min_IO_cost = 0;
}
/*