pgsql: HashAgg: release write buffers sooner by rewinding tape.

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pgsql: HashAgg: release write buffers sooner by rewinding tape.

Jeff Davis-3
HashAgg: release write buffers sooner by rewinding tape.

This was an oversight. The purpose of 7fdd919ae7 was to avoid keeping
tape buffers around unnecessisarily, but HashAgg didn't rewind early
enough.

Reviewed-by: Peter Geoghegan
Discussion: https://postgr.es/m/1fb1151c2cddf8747d14e0532da283c3f97e2685.camel@...
Backpatch-through: 13

Branch
------
REL_13_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/42a46f5a76ecb435ac3a29fc3a0d03f1cfff17ab

Modified Files
--------------
src/backend/executor/nodeAgg.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)