Fix starting unnecessary transaction when SET command is issued.

In streaming replication mode, there's no point to start internal
transaction when SET command is issued. The existing behavior is
harmless but waste of CPU cycle.

diff --git a/src/protocol/pool_proto_modules.c b/src/protocol/pool_proto_modules.c
index 8c504584b91cc46c7c7c8ffe16d7903868214987..a07e1823ff390f4e59951c8ce9f8179897f25c3b 100644 (file)
--- a/src/protocol/pool_proto_modules.c
+++ b/src/protocol/pool_proto_modules.c
@@ -522,7 +522,7 @@ POOL_STATUS SimpleQuery(POOL_CONNECTION *frontend,
                 * - statement is INSERT
                 * - either "INSERT LOCK" comment exists or insert_lock directive specified
                 */
-               if (!RAW_MODE)
+               if (!RAW_MODE && !STREAM)
                {
                        /*
                         * If there's only one node to send the command, there's no