Adjust tuplestore stats API
1eff8279d added an API to tuplestore.c to allow callers to obtain
storage telemetry data. That API wasn't quite good enough for callers
that perform tuplestore_clear() as the telemetry functions only
accounted for the current state of the tuplestore, not the maximums
before tuplestore_clear() was called.
There's a pending patch that would like to add tuplestore telemetry
output to EXPLAIN ANALYZE for WindowAgg. That node type uses
tuplestore_clear() before moving to the next window partition and we
want to show the maximum space used, not the space used for the final
partition.
Reviewed-by: Tatsuo Ishii, Ashutosh Bapat
Discussion: https://postgres/m/CAApHDvoY8cibGcicLV0fNh=9JVx9PANcWvhkdjBnDCc9Quqytg@mail.gmail.com
Branch
------
master
Details
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https://git.postgresql.org/pg/commitdiff/9fba1ed2947382af213dfbfabfcd8898c89bf4ca
Modified Files
--------------
src/backend/commands/explain.c | 17 +++++-----
src/backend/utils/sort/tuplestore.c | 64 +++++++++++++++++++++----------------
src/include/utils/tuplestore.h | 5 ++-
3 files changed, 48 insertions(+), 38 deletions(-)
