From dd0ec8f78ff568137378e2a5d2614e6d13421a58 Mon Sep 17 00:00:00 2001
From: Bomin Zhang <bmzhang@taosdata.com>
Date: Sat, 31 Oct 2020 13:12:07 +0800
Subject: [PATCH] TD-1864: disable sliding without interval

#4049
---
 src/client/src/tscSQLParser.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 8716b5cb02..e084ae449e 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -619,11 +619,15 @@ static bool isTopBottomQuery(SQueryInfo* pQueryInfo) {
 int32_t parseIntervalClause(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SQuerySQL* pQuerySql) {
   const char* msg1 = "invalid query expression";
   const char* msg2 = "interval cannot be less than 10 ms";
+  const char* msg3 = "sliding cannot be used without interval";
 
   STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
   STableComInfo tinfo = tscGetTableInfo(pTableMetaInfo->pTableMeta);
   
   if (pQuerySql->interval.type == 0 || pQuerySql->interval.n == 0) {
+    if (pQuerySql->sliding.n > 0) {
+      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
+    }
     return TSDB_CODE_SUCCESS;
   }
 
-- 
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