Fix "pg_bench -C -M prepared".

tglsfdc · tglsfdc · commit c02aae418527 · 2016-03-16T23:18:07.000-04:00
This didn't work because when we dropped and re-established a database
connection, we did not bother to reset session-specific state such as
the statements-are-prepared flags.

The st-&gt;prepared[] array certainly needs to be flushed, and I cleared a
couple of other fields as well that couldn't possibly retain meaningful
state for a new connection.

In passing, fix some bogus comments and strange field order choices.

Per report from Robins Tharakan.
diff --git a/contrib/pgbench/pgbench.c b/contrib/pgbench/pgbench.c
@@ -201,7 +201,7 @@ typedef struct
 	int			state;			/* state No. */
 	int			cnt;			/* xacts count */
 	int			ecnt;			/* error count */
-	int			listen;			/* 0 indicates that an async query has been
+	int			listen;			/* 1 indicates that an async query has been
 								 * sent */
 	int			sleeping;		/* 1 indicates that the client is napping */
 	int64		until;			/* napping until (usec) */
@@ -1115,6 +1115,11 @@ doCustom(TState *thread, CState *st, instr_time *conn_time, FILE *logfile, AggVa
 		}
 		INSTR_TIME_SET_CURRENT(end);
 		INSTR_TIME_ACCUM_DIFF(*conn_time, end, start);
+
+		/* Reset session-local state */
+		st->listen = 0;
+		st->sleeping = 0;
+		memset(st->prepared, 0, sizeof(st->prepared));
 	}
 
 	/* Record transaction start time if logging is enabled */
