Thread: pgsql: Update parallel BTree scan state when the scan keys can't be sat

Update parallel BTree scan state when the scan keys can't be satisfied.

For parallel btree scan to work for array of scan keys, it should reach
BTPARALLEL_DONE state once for every distinct combination of array keys.
This is required to ensure that the parallel workers don't try to seize
blocks at the same time for different scan keys. We missed to update this
state when we discovered that the scan keys can't be satisfied.

Author: James Hunter
Reviewed-by: Amit Kapila
Tested-by: Justin Pryzby
Backpatch-through: 10, where it was introduced
Discussion: https://postgr.es/m/4248CABC-25E3-4809-B4D0-128E1BAABC3C@amazon.com

Branch
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REL_11_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/956891faba7d3036907922266f19a9fb7140363d

Modified Files
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src/backend/access/nbtree/nbtsearch.c | 4 ++++
1 file changed, 4 insertions(+)