!823 禁止cursor调用含有commit/rollback的函数或者存储过程

Merge pull request !823 from Ricardo_Cui/master

src/gausskernel/optimizer/commands/portalcmds.cpp

@@ -187,9 +187,14 @@ void PerformPortalFetch(FetchStmt* stmt, DestReceiver* dest, char* completionTag
     if (stmt->ismove)
         dest = None_Receiver;
 
+    bool savedIsAllowCommitRollback;
+    bool needResetErrMsg = stp_disable_xact_and_set_err_msg(&savedIsAllowCommitRollback, STP_XACT_OPEN_FOR);
+
     /* Do it */
     nprocessed = PortalRunFetch(portal, stmt->direction, stmt->howMany, dest);
 
+    stp_reset_xact_state_and_err_msg(savedIsAllowCommitRollback, needResetErrMsg);
+
     /* Return command status if wanted */
     if (completionTag != NULL) {
         int rc = snprintf_s(completionTag,