pgsql: Don't duplicate parallel seqscan shmem sizing logic in nbtree. - Mailing list pgsql-committers

Don't duplicate parallel seqscan shmem sizing logic in nbtree.

This is architecturally mildly problematic, which becomes more
pronounced with the upcoming introduction of pluggable storage.

To fix, teach heap_parallelscan_estimate() to deal with SnapshotAny
snapshots, and then use it from _bt_parallel_estimate_shared().

Author: Andres Freund
Discussion: https://postgr.es/m/20180703070645.wchpu5muyto5n647@alap3.anarazel.de

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/90525d7b4e0fe5ebd53960cd7ef59ee11ff06516

Modified Files
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src/backend/access/heap/heapam.c    | 10 ++++++++--
src/backend/access/nbtree/nbtsort.c | 13 +++----------
2 files changed, 11 insertions(+), 12 deletions(-)