Tom Lane 92ee2528d8 Tweak processing of multiple-index-scan plans to reduce overhead when ...

handling many-way scans: instead of re-evaluating all prior indexscan
quals to see if a tuple has been fetched more than once, use a hash table
indexed by tuple CTID.  But fall back to the old way if the hash table
grows to exceed SortMem.

2003-08-22 20:26:43 +00:00

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