Wire up query cancel interrupt for walsender backends.

anarazel · anarazel · commit c1abe6c786d8 · 2017-06-05T19:18:16.000-07:00
This allows to cancel commands run over replication connections. While it might have some use before v10, it has become important now that normal SQL commands are allowed in database connected walsender connections. Author: Petr Jelinek Reviewed-By: Andres Freund, Michael Paquier Discussion: https://postgr.es/m/7966f454-7cd7-2b0c-8b70-cdca9d5a8c97@2ndquadrant.com
diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c
@@ -2929,7 +2929,7 @@ WalSndSignals(void)
 	/* Set up signal handlers */
 	pqsignal(SIGHUP, PostgresSigHupHandler);	/* set flag to read config
 												 * file */
-	pqsignal(SIGINT, SIG_IGN);	/* not used */
+	pqsignal(SIGINT, StatementCancelHandler);	/* query cancel */
 	pqsignal(SIGTERM, die);		/* request shutdown */
 	pqsignal(SIGQUIT, quickdie);	/* hard crash time */
 	InitializeTimeouts();		/* establishes SIGALRM handler */
