Horton

Expose BufferUsageAccumDiff().

Fujii Masao <fujii@postgresql.org>

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Commit: 4a539a25ebfc48329fd656a95f3c1eb2cda38af3
Author: Fujii Masao <fujii@postgresql.org>
Date: 2020-03-30T03:15:26Z
Releases: 13.0 
Expose BufferUsageAccumDiff().

Previously pg_stat_statements calculated the difference of buffer counters
by its own code even while BufferUsageAccumDiff() had the same code.
This commit expose BufferUsageAccumDiff() and makes pg_stat_statements
use it for the calculation, in order to simply the code.

This change also would be useful for the upcoming patch for the planning
counters in pg_stat_statements because the patch will add one more code
for the calculation of difference of buffer counters and that can easily be
done by using BufferUsageAccumDiff().

Author: Julien Rouhaud
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/bdfee4e0-a304-2498-8da5-3cb52c0a193e@oss.nttdata.com

Files

PathChange+/−
contrib/pg_stat_statements/pg_stat_statements.c modified +2 −24
src/backend/executor/instrument.c modified +1 −3
src/include/executor/instrument.h modified +2 −0

Discussion