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(parent: 9381cb5) | patch
Reset the binary heap in MergeAppend rescans.
authorTom Lane <tgl@sss.pgh.pa.us>
Fri, 30 Aug 2013 23:15:21 +0000 (19:15 -0400)
committerTom Lane <tgl@sss.pgh.pa.us>
Fri, 30 Aug 2013 23:15:21 +0000 (19:15 -0400)
commit8e2b71d2d0381f7acc820a2400580a1e3a6add8c
tree2e419f5090c23820a43397c391627150bf7fae41tree | snapshot
parent9381cb5229da1f3556909585b38ada347d798161commit | diff
Reset the binary heap in MergeAppend rescans.

Failing to do so can cause queries to return wrong data, error out or crash.
This requires adding a new binaryheap_reset() method to binaryheap.c,
but that probably should have been there anyway.

Per bug #8410 from Terje Elde.  Diagnosis and patch by Andres Freund.
src/backend/executor/nodeMergeAppend.c diff | blob | history
src/backend/lib/binaryheap.c diff | blob | history
src/include/lib/binaryheap.h diff | blob | history
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