fix: create stream error

source/libs/parser/src/parTranslater.c

@@ -2837,7 +2837,7 @@ static int32_t rewriteProjectAlias(SNodeList* pProjectionList) {
   return TSDB_CODE_SUCCESS;
 }
 
-static int32_t checkProjectAlias(STranslateContext* pCxt, SNodeList* pProjectionList) {
+static int32_t checkProjectAlias(STranslateContext* pCxt, SNodeList* pProjectionList, SHashObj** pOutput) {
   SHashObj* pUserAliasSet = taosHashInit(LIST_LENGTH(pProjectionList),
                                          taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), false, HASH_NO_LOCK);
   SNode*    pProject = NULL;
@@ -2849,13 +2849,17 @@ static int32_t checkProjectAlias(STranslateContext* pCxt, SNodeList* pProjection
     }
     taosHashPut(pUserAliasSet, pExpr->userAlias, strlen(pExpr->userAlias), &pExpr, POINTER_BYTES);
   }
-  taosHashCleanup(pUserAliasSet);
+  if (NULL == pOutput) {
+    taosHashCleanup(pUserAliasSet);
+  } else {
+    *pOutput = pUserAliasSet;
+  }
   return TSDB_CODE_SUCCESS;
 }
 
 static int32_t translateProjectionList(STranslateContext* pCxt, SSelectStmt* pSelect) {
   if (pSelect->isSubquery) {
-    return checkProjectAlias(pCxt, pSelect->pProjectionList);
+    return checkProjectAlias(pCxt, pSelect->pProjectionList, NULL);
   }
   return rewriteProjectAlias(pSelect->pProjectionList);
 }
@@ -3888,8 +3892,7 @@ static int32_t checkDbKeepOption(STranslateContext* pCxt, SDatabaseOptions* pOpt
       pOptions->keep[0] > tsdbMaxKeep || pOptions->keep[1] > tsdbMaxKeep || pOptions->keep[2] > tsdbMaxKeep) {
     return generateSyntaxErrMsgExt(&pCxt->msgBuf, TSDB_CODE_PAR_INVALID_DB_OPTION,
                                    "Invalid option keep: %" PRId64 ", %" PRId64 ", %" PRId64 " valid range: [%dm, %dm]",
-                                   pOptions->keep[0], pOptions->keep[1], pOptions->keep[2], TSDB_MIN_KEEP,
-                                   tsdbMaxKeep);
+                                   pOptions->keep[0], pOptions->keep[1], pOptions->keep[2], TSDB_MIN_KEEP, tsdbMaxKeep);
   }
 
   if (!((pOptions->keep[0] <= pOptions->keep[1]) && (pOptions->keep[1] <= pOptions->keep[2]))) {
@@ -4044,7 +4047,7 @@ static int32_t checkDatabaseOptions(STranslateContext* pCxt, const char* pDbName
     code = checkDbPrecisionOption(pCxt, pOptions);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = checkDbKeepOption(pCxt, pOptions); // use precision
+    code = checkDbKeepOption(pCxt, pOptions);  // use precision
   }
   if (TSDB_CODE_SUCCESS == code) {
     code = checkDbRangeOption(pCxt, "pages", pOptions->pages, TSDB_MIN_PAGES_PER_VNODE, TSDB_MAX_PAGES_PER_VNODE);
@@ -5504,9 +5507,21 @@ static void getSourceDatabase(SNode* pStmt, int32_t acctId, char* pDbFName) {
   tNameGetFullDbName(&name, pDbFName);
 }
 
-static int32_t addWstartTsToCreateStreamQuery(SNode* pStmt) {
-  SSelectStmt* pSelect = (SSelectStmt*)pStmt;
-  SNode*       pProj = nodesListGetNode(pSelect->pProjectionList, 0);
+static void getStreamQueryFirstProjectAliasName(SHashObj* pUserAliasSet, char* aliasName, int32_t len) {
+  if (NULL == taosHashGet(pUserAliasSet, "_wstart", strlen("_wstart"))) {
+    snprintf(aliasName, len, "%s", "_wstart");
+    return;
+  }
+  if (NULL == taosHashGet(pUserAliasSet, "ts", strlen("ts"))) {
+    snprintf(aliasName, len, "%s", "ts");
+    return;
+  }
+  taosRandStr(aliasName, len);
+  return;
+}
+
+static int32_t addWstartTsToCreateStreamQueryImpl(SSelectStmt* pSelect, SHashObj* pUserAliasSet) {
+  SNode* pProj = nodesListGetNode(pSelect->pProjectionList, 0);
   if (NULL == pSelect->pWindow ||
       (QUERY_NODE_FUNCTION == nodeType(pProj) && 0 == strcmp("_wstart", ((SFunctionNode*)pProj)->functionName))) {
     return TSDB_CODE_SUCCESS;
@@ -5516,7 +5531,7 @@ static int32_t addWstartTsToCreateStreamQuery(SNode* pStmt) {
     return TSDB_CODE_OUT_OF_MEMORY;
   }
   strcpy(pFunc->functionName, "_wstart");
-  strcpy(pFunc->node.aliasName, pFunc->functionName);
+  getStreamQueryFirstProjectAliasName(pUserAliasSet, pFunc->node.aliasName, sizeof(pFunc->node.aliasName));
   int32_t code = nodesListPushFront(pSelect->pProjectionList, (SNode*)pFunc);
   if (TSDB_CODE_SUCCESS != code) {
     nodesDestroyNode((SNode*)pFunc);
@@ -5524,6 +5539,17 @@ static int32_t addWstartTsToCreateStreamQuery(SNode* pStmt) {
   return code;
 }
 
+static int32_t addWstartTsToCreateStreamQuery(STranslateContext* pCxt, SNode* pStmt) {
+  SSelectStmt* pSelect = (SSelectStmt*)pStmt;
+  SHashObj*    pUserAliasSet = NULL;
+  int32_t      code = checkProjectAlias(pCxt, pSelect->pProjectionList, &pUserAliasSet);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = addWstartTsToCreateStreamQueryImpl(pSelect, pUserAliasSet);
+  }
+  taosHashCleanup(pUserAliasSet);
+  return code;
+}
+
 static int32_t addTagsToCreateStreamQuery(STranslateContext* pCxt, SCreateStreamStmt* pStmt, SSelectStmt* pSelect) {
   if (NULL == pStmt->pTags) {
     return TSDB_CODE_SUCCESS;
@@ -5626,7 +5652,7 @@ static int32_t checkStreamQuery(STranslateContext* pCxt, SSelectStmt* pSelect) {
 
 static int32_t buildCreateStreamQuery(STranslateContext* pCxt, SCreateStreamStmt* pStmt, SCMCreateStreamReq* pReq) {
   pCxt->createStream = true;
-  int32_t code = addWstartTsToCreateStreamQuery(pStmt->pQuery);
+  int32_t code = addWstartTsToCreateStreamQuery(pCxt, pStmt->pQuery);
   if (TSDB_CODE_SUCCESS == code) {
     code = addSubtableInfoToCreateStreamQuery(pCxt, pStmt);
   }