Revert "Silence compiler warning"

This reverts commit 9dc122585551516309c9362e673effdbf3bd79bd.

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
index a6505c7335b440a9cc3a39a0255e3b8f00c161ce..1679cce1f172f2f266d0732118e68077fd44e705 100644 (file)
--- 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)
        {