pgsql: BitmapHeapScan: postpone setting can_skip_fetch

BitmapHeapScan: postpone setting can_skip_fetch

Set BitmapHeapScanState->can_skip_fetch in BitmapHeapNext() instead of
in ExecInitBitmapHeapScan(). This is a preliminary step to pushing the
skip fetch optimization into heap AM code.

Author: Melanie Plageman
Reviewed-by: Tomas Vondra, Andres Freund, Heikki Linnakangas
Discussion: https://postgr.es/m/CAAKRu_ZwCwWFeL_H3ia26bP2e7HiKLWt0ZmGXPVwPO6uXq0vaA%40mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/fe1431e39cdde5f65cb52f068bc86a7490f8a4e3

Modified Files
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src/backend/executor/nodeBitmapHeapscan.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)