From 1d35b18642017987f46ef859686dae41e76ef7b2 Mon Sep 17 00:00:00 2001
From: Hongze Cheng <hzcheng@taosdata.com>
Date: Thu, 10 Sep 2020 14:43:49 +0800
Subject: [PATCH] fix TD-1387

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

diff --git a/src/tsdb/src/tsdbRWHelper.c b/src/tsdb/src/tsdbRWHelper.c
index 632d299542..bcfa768341 100644
--- a/src/tsdb/src/tsdbRWHelper.c
+++ b/src/tsdb/src/tsdbRWHelper.c
@@ -1314,7 +1314,7 @@ static int tsdbLoadBlockDataImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDa
   int dcol = 0;  // loop iter for SDataCols object
   while (dcol < pDataCols->numOfCols) {
     SDataCol *pDataCol = &(pDataCols->cols[dcol]);
-    if (ccol >= pCompData->numOfCols) {
+    if (dcol != 0 && ccol >= pCompData->numOfCols) {
       // Set current column as NULL and forward
       dataColSetNEleNull(pDataCol, pCompBlock->numOfRows, pDataCols->maxPoints);
       dcol++;
-- 
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