Revert "Silence compiler warning"

tvondra · tvondra · commit 4f9ed8f3c5ef · 2019-08-04T23:38:19.000+02:00
This reverts commit 9dc1225. As committed, statement sampling used the existing duration threshold (log_min_duration_statement) when decide which statements to sample. The issue is that even the longest statements are subject to sampling, and so may not end up logged. An improvement was proposed, introducing a second duration threshold, but it would not be backwards compatible. So we've decided to revert this feature - the separate threshold should be part of the feature itself. Discussion: https://postgr.es/m/CAFj8pRDS8tQ3Wviw9%3DAvODyUciPSrGeMhJi_WPE%2BEB8%2B4gLL-Q%40mail.gmail.com
diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
@@ -2256,14 +2256,13 @@ check_log_duration(char *msec_str, bool was_logged)
 
 		/*
 		 * Do not log if log_statement_sample_rate = 0. Log a sample if
-		 * log_statement_sample_rate <= 1 and avoid unnecessary random() call
-		 * if log_statement_sample_rate = 1.  But don't compute any of this
-		 * unless needed.
+		 * log_statement_sample_rate <= 1 and avoid unecessary random() call
+		 * if log_statement_sample_rate = 1.
 		 */
-		in_sample = exceeded &&
-			log_statement_sample_rate != 0 &&
-			(log_statement_sample_rate == 1 ||
-			 random() <= log_statement_sample_rate * MAX_RANDOM_VALUE);
+		if (exceeded)
+			in_sample = log_statement_sample_rate != 0 &&
+				(log_statement_sample_rate == 1 ||
+				 random() <= log_statement_sample_rate * MAX_RANDOM_VALUE);
 
 		if ((exceeded && in_sample) || log_duration || xact_is_sampled)
 		{
