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495864a4cf
This commit adds to pgstatfuncs.c a new routine called pg_stat_wal_build_tuple(), helper routine for pg_stat_get_wal(). This is in charge of filling one tuple based on the contents of PgStat_WalStats retrieved from pgstats. This refactoring will be used by an upcoming patch introducing backend-level WAL statistics, simplifying the main patch. Note that it is not possible for stats_reset to be NULL in pg_stat_wal; backend statistics need to be able to handle this case. Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Discussion: https://postgr.es/m/Z3zqc4o09dM/Ezyz@ip-10-97-1-34.eu-west-3.compute.internal