From c9adad624d14ba6421eeccde323e4f8fee3b9452 Mon Sep 17 00:00:00 2001
From: tickduan <417921451@qq.com>
Date: Mon, 7 Jun 2021 17:04:22 +0800
Subject: [PATCH]  restore, fix build error

---
 src/client/src/tscSQLParser.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index a5b1675170..a04bfa0482 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -6675,7 +6675,7 @@ int32_t doCheckForStream(SSqlObj* pSql, SSqlInfo* pInfo) {
   const char* msg6 = "from missing in subclause";
   const char* msg7 = "time interval is required";
   const char* msg8 = "the first column should be primary timestamp column";
-
+   
   SSqlCmd*    pCmd = &pSql->cmd;
   SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
   assert(pQueryInfo->numOfTables == 1);
@@ -6732,15 +6732,26 @@ int32_t doCheckForStream(SSqlObj* pSql, SSqlInfo* pInfo) {
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg2);
   }
 
+  // project query primary column must be timestamp type
   if (tscIsProjectionQuery(pQueryInfo)) {
-    SExprInfo* pExpr = tscExprGet(pQueryInfo, 0);
-    if (pExpr->base.colInfo.colId != PRIMARYKEY_TIMESTAMP_COL_INDEX) {
+    size_t size = tscSqlExprNumOfExprs(pQueryInfo);
+    // check zero
+    if(size == 0) {
+      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg8);
+    }
+
+    // check primary column is timestamp
+    SSqlExpr* pSqlExpr = tscSqlExprGet(pQueryInfo, 0);
+    if(pSqlExpr == NULL) {
+      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg8);
+    }
+    if( pSqlExpr->colInfo.colId != PRIMARYKEY_TIMESTAMP_COL_INDEX) {
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg8);
     }
   } else {
     if (pQueryInfo->interval.interval == 0) {
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg7);
-    }
+    }    
   }
 
   // set the created table[stream] name