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Tom Lane 8a859691d5 Properly initialize SortSupport for ORDER BY rechecks in nodeIndexscan.c. ... Fix still another bug in commit 35fcb1b3d: it failed to fully initialize the SortSupport states it introduced to allow the executor to re-check ORDER BY expressions containing distance operators. That led to a null pointer dereference if the sortsupport code tried to use ssup_cxt. The problem only manifests in narrow cases, explaining the lack of previous field reports. It requires a GiST-indexable distance operator that lacks SortSupport and is on a pass-by-ref data type, which among core+contrib seems to be only btree_gist's interval opclass; and it requires the scan to be done as an IndexScan not an IndexOnlyScan, which explains how btree_gist's regression test didn't catch it. Per bug #14134 from Jihyun Yu. Peter Geoghegan Report: <20160511154904.2603.43889@wrigleys.postgresql.org>		10 years ago
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interval.out	Properly initialize SortSupport for ORDER BY rechecks in nodeIndexscan.c.	10 years ago
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not_equal.out	Ensure plan stability in contrib/btree_gist regression test.	10 years ago
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