diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index d75f77680709c3bea4dd5d8a21525d60a144269e..7dd0de23269417372898de068c6d142349cccfb2 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -6259,10 +6259,12 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
 
 int32_t doCheckForStream(SSqlObj* pSql, SSqlInfo* pInfo) {
   const char* msg1 = "invalid table name";
+  const char* msg2 = "functions not allowed in CQ";
   const char* msg3 = "fill only available for interval query";
   const char* msg4 = "fill option not supported in stream computing";
   const char* msg5 = "sql too long";  // todo ADD support
   const char* msg6 = "from missing in subclause";
+  const char* msg7 = "time interval is required";
   
   SSqlCmd*    pCmd = &pSql->cmd;
   SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
@@ -6272,10 +6274,10 @@ int32_t doCheckForStream(SSqlObj* pSql, SSqlInfo* pInfo) {
   STableMetaInfo*  pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
 
   // if sql specifies db, use it, otherwise use default db
-  SStrToken* pzTableName = &(pCreateTable->name);
+  SStrToken* pName = &(pCreateTable->name);
   SQuerySQL* pQuerySql = pCreateTable->pSelect;
 
-  if (tscValidateName(pzTableName) != TSDB_CODE_SUCCESS) {
+  if (tscValidateName(pName) != TSDB_CODE_SUCCESS) {
     return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg1);
   }
   
@@ -6314,15 +6316,19 @@ int32_t doCheckForStream(SSqlObj* pSql, SSqlInfo* pInfo) {
   // set interval value
   if (parseIntervalClause(pSql, pQueryInfo, pQuerySql) != TSDB_CODE_SUCCESS) {
     return TSDB_CODE_TSC_INVALID_SQL;
-  } else {
-    if ((pQueryInfo->interval.interval > 0) &&
-        (validateFunctionsInIntervalOrGroupbyQuery(pCmd, pQueryInfo) != TSDB_CODE_SUCCESS)) {
-      return TSDB_CODE_TSC_INVALID_SQL;
-    }
+  }
+
+  if ((pQueryInfo->interval.interval > 0) &&
+      (validateFunctionsInIntervalOrGroupbyQuery(pCmd, pQueryInfo) != TSDB_CODE_SUCCESS)) {
+    return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg2);
+  }
+
+  if (!tscIsProjectionQuery(pQueryInfo) && pQueryInfo->interval.interval == 0) {
+    return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg7);
   }
 
   // set the created table[stream] name
-  code = tscSetTableFullName(pTableMetaInfo, pzTableName, pSql);
+  code = tscSetTableFullName(pTableMetaInfo, pName, pSql);
   if (code != TSDB_CODE_SUCCESS) {
     return code;
   }
diff --git a/src/client/src/tscStream.c b/src/client/src/tscStream.c
index 90e67f39a1d7f9774e55fda80afd014be260f682..d1004fff62db5d58c0ae0ef45bd4571ee7368b20 100644
--- a/src/client/src/tscStream.c
+++ b/src/client/src/tscStream.c
@@ -399,11 +399,16 @@ static void tscSetNextLaunchTimer(SSqlStream *pStream, SSqlObj *pSql) {
   tscSetRetryTimer(pStream, pSql, timer);
 }
 
-static void tscSetSlidingWindowInfo(SSqlObj *pSql, SSqlStream *pStream) {
+static int32_t tscSetSlidingWindowInfo(SSqlObj *pSql, SSqlStream *pStream) {
   int64_t minIntervalTime =
       (pStream->precision == TSDB_TIME_PRECISION_MICRO) ? tsMinIntervalTime * 1000L : tsMinIntervalTime;
   
   SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
+
+  if (!pStream->isProject && pQueryInfo->interval.interval == 0) {
+    sprintf(pSql->cmd.payload, "the interval value is 0");
+    return -1;
+  }
   
   if (pQueryInfo->interval.intervalUnit != 'n' && pQueryInfo->interval.intervalUnit!= 'y' && pQueryInfo->interval.interval < minIntervalTime) {
     tscWarn("%p stream:%p, original sample interval:%" PRId64 " too small, reset to:%" PRId64, pSql, pStream,
@@ -443,6 +448,8 @@ static void tscSetSlidingWindowInfo(SSqlObj *pSql, SSqlStream *pStream) {
     pQueryInfo->interval.interval = 0; // clear the interval value to avoid the force time window split by query processor
     pQueryInfo->interval.sliding = 0;
   }
+
+  return TSDB_CODE_SUCCESS;
 }
 
 static int64_t tscGetStreamStartTimestamp(SSqlObj *pSql, SSqlStream *pStream, int64_t stime) {
@@ -492,34 +499,19 @@ static int64_t tscGetLaunchTimestamp(const SSqlStream *pStream) {
   return (pStream->precision == TSDB_TIME_PRECISION_MICRO) ? timer / 1000L : timer;
 }
 
-static void setErrorInfo(SSqlObj* pSql, int32_t code, char* info) {
-  if (pSql == NULL) {
-    return;
-  }
-
-  SSqlCmd* pCmd = &pSql->cmd;
-
-  pSql->res.code = code;
-  
-  if (info != NULL) {
-    strncpy(pCmd->payload, info, pCmd->payloadLen);
-  }
-}
-
 static void tscCreateStream(void *param, TAOS_RES *res, int code) {
   SSqlStream* pStream = (SSqlStream*)param;
   SSqlObj* pSql = pStream->pSql;
   SSqlCmd* pCmd = &pSql->cmd;
 
   if (code != TSDB_CODE_SUCCESS) {
-    setErrorInfo(pSql, code, pCmd->payload);
-    tscError("%p open stream failed, sql:%s, reason:%s, code:0x%08x", pSql, pSql->sqlstr, pCmd->payload, code);
+    pSql->res.code = code;
+    tscError("%p open stream failed, sql:%s, reason:%s, code:%s", pSql, pSql->sqlstr, pCmd->payload, tstrerror(code));
+
     pStream->fp(pStream->param, NULL, NULL);
     return;
   }
 
-  registerSqlObj(pSql);
-
   SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
   STableMetaInfo* pTableMetaInfo = tscGetMetaInfo(pQueryInfo, 0);
   STableComInfo tinfo = tscGetTableInfo(pTableMetaInfo->pTableMeta);
@@ -530,13 +522,22 @@ static void tscCreateStream(void *param, TAOS_RES *res, int code) {
   pStream->ctime = taosGetTimestamp(pStream->precision);
   pStream->etime = pQueryInfo->window.ekey;
 
-  tscAddIntoStreamList(pStream);
+  if (tscSetSlidingWindowInfo(pSql, pStream) != TSDB_CODE_SUCCESS) {
+    pSql->res.code = code;
+
+    tscError("%p stream %p open failed, since the interval value is incorrect", pSql, pStream);
+    pStream->fp(pStream->param, NULL, NULL);
+    return;
+  }
 
-  tscSetSlidingWindowInfo(pSql, pStream);
   pStream->stime = tscGetStreamStartTimestamp(pSql, pStream, pStream->stime);
 
   int64_t starttime = tscGetLaunchTimestamp(pStream);
   pCmd->command = TSDB_SQL_SELECT;
+
+  registerSqlObj(pSql);
+  tscAddIntoStreamList(pStream);
+
   taosTmrReset(tscProcessStreamTimer, (int32_t)starttime, pStream, tscTmr, &pStream->pTimer);
 
   tscDebug("%p stream:%p is opened, query on:%s, interval:%" PRId64 ", sliding:%" PRId64 ", first launched in:%" PRId64 ", sql:%s", pSql,