From e06ab2ea8348cbff2fd7425471cc5036a9774a9a Mon Sep 17 00:00:00 2001
From: hzcheng <hzcheng@taosdata.com>
Date: Tue, 5 May 2020 09:42:01 +0800
Subject: [PATCH] fix #1794

---
 src/common/src/tdataformat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index 02351f7d3a..28f42f85a5 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -424,8 +424,8 @@ int tdMergeDataCols(SDataCols *target, SDataCols *source, int rowsToMerge) {
         dataColAppendVal(target->cols + j, tdGetColDataOfRow(source->cols + j, i), target->numOfPoints,
                          target->maxPoints);
       }
+      target->numOfPoints++;
     }
-    target->numOfPoints++;
   } else {
     pTarget = tdDupDataCols(target, true);
     if (pTarget == NULL) goto _err;
-- 
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