| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Improve ExecFindInitialMatchingSubPlans's subplan renumbering lo |
| Date: | 2018-06-11 21:36:03 |
| Message-ID: | E1fSUTr-00054L-I2@gemulon.postgresql.org |
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| Lists: | pgsql-committers |
Improve ExecFindInitialMatchingSubPlans's subplan renumbering logic.
We don't need two passes if we scan child partitions before parents,
as that way the children's present_parts are up to date before they're
needed. I (tgl) think there's actually a bug being fixed here, for the
case of an intermediate partitioned table with no direct leaf children,
but haven't attempted to construct a test case to prove it.
David Rowley
Discussion: https://postgr.es/m/CAKJS1f-6GODRNgEtdPxCnAPme2h2hTztB6LmtfdmcYAAOE0kQg@mail.gmail.com
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/69025c5a07a10c842bfbcb62d4af1221e5ce7e85
Modified Files
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src/backend/executor/execPartition.c | 68 ++++++++++++------------------------
1 file changed, 22 insertions(+), 46 deletions(-)
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