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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2016-12-20 09:20:17 +0200 |
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| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2016-12-20 09:20:30 +0200 |
| commit | ce92fc4e2540d0ce554e498adb27f0ef29199b94 (patch) | |
| tree | c45da3496e3f375558e4fa4f046fdf7601383195 /src/backend/executor/execParallel.c | |
| parent | 3f07eff104793cfd82bfd3e093991695221abfd8 (diff) | |
| download | postgresql-ce92fc4e2540d0ce554e498adb27f0ef29199b94.tar.gz postgresql-ce92fc4e2540d0ce554e498adb27f0ef29199b94.zip | |
Fix sharing Agg transition state of DISTINCT or ordered aggs.
If a query contained two aggregates that could share the transition value,
we would correctly collect the input into a tuplesort only once, but
incorrectly run the transition function over the accumulated input twice,
in finalize_aggregates(). That caused a crash, when we tried to call
tuplesort_performsort() on an already-freed NULL tuplestore.
Backport to 9.6, where sharing of transition state and this bug were
introduced.
Analysis by Tom Lane.
Discussion: https://www.postgresql.org/message-id/ac5b0b69-744c-9114-6218-8300ac920e61@iki.fi
Diffstat (limited to 'src/backend/executor/execParallel.c')
0 files changed, 0 insertions, 0 deletions