From 6b0b783aaff83027613ad8836703cd5137ec4b50 Mon Sep 17 00:00:00 2001
From: Haojun Liao <hjliao@taosdata.com>
Date: Sat, 14 Nov 2020 11:06:42 +0800
Subject: [PATCH] [TD-225]

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

diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 4f04a82549..080ef9f2d2 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -71,7 +71,7 @@ void tsSetSTableQueryCond(STagCond* pTagCond, uint64_t uid, SBufferWriter* bw) {
 }
 
 bool tscQueryTags(SQueryInfo* pQueryInfo) {
-  int32_t numOfCols = (int32_t)(pQueryInfo);
+  int32_t numOfCols = (int32_t) tscSqlExprNumOfExprs(pQueryInfo);
   for (int32_t i = 0; i < numOfCols; ++i) {
     SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
     int32_t functId = pExpr->functionId;
-- 
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