Function WalUsageAccumDiff

src/backend/executor/instrument.c:593–599

}

void
WalUsageAccumDiff(WalUsage *dst, const WalUsage *add, const WalUsage *sub)
{
	dst->wal_bytes += add->wal_bytes - sub->wal_bytes;
	dst->wal_records += add->wal_records - sub->wal_records;
	dst->wal_fpi += add->wal_fpi - sub->wal_fpi;
}