fix taosd crash issue

source/client/inc/clientStmt.h

@@ -71,6 +71,7 @@ typedef struct SStmtBindInfo {
 
 typedef struct SStmtExecInfo {
   int32_t      affectedRows;
+  bool         emptyRes;
   SRequestObj* pRequest;
   SHashObj*    pVgHash;
   SHashObj*    pBlockHash;

source/client/src/clientStmt.c

@@ -279,6 +279,7 @@ int32_t stmtCleanExecInfo(STscStmt* pStmt, bool keepTable, bool freeRequest) {
   }
 
   pStmt->exec.autoCreateTbl = false;
+  pStmt->exec.emptyRes = false;
   
   if (keepTable) {
     return TSDB_CODE_SUCCESS;
@@ -628,8 +629,7 @@ int stmtBindBatch(TAOS_STMT* stmt, TAOS_MULTI_BIND* bind, int32_t colIdx) {
       STMT_ERR_RET(stmtRestoreQueryFields(pStmt));
     }
 
-    bool emptyResult = false;
-    STMT_RET(qStmtBindParam(pStmt->sql.pQueryPlan, bind, colIdx, pStmt->exec.pRequest->requestId, &emptyResult));
+    STMT_RET(qStmtBindParam(pStmt->sql.pQueryPlan, bind, colIdx, pStmt->exec.pRequest->requestId, &pStmt->exec.emptyRes));
   }
   
   STableDataBlocks **pDataBlock = (STableDataBlocks**)taosHashGet(pStmt->exec.pBlockHash, pStmt->bInfo.tbFName, strlen(pStmt->bInfo.tbFName));
@@ -736,7 +736,11 @@ int stmtExec(TAOS_STMT *stmt) {
   STMT_ERR_RET(stmtSwitchStatus(pStmt, STMT_EXECUTE));
 
   if (STMT_TYPE_QUERY == pStmt->sql.type) {
-    scheduleQuery(pStmt->exec.pRequest, pStmt->sql.pQueryPlan, pStmt->sql.nodeList, NULL);
+    if (pStmt->exec.emptyRes) {
+      pStmt->exec.pRequest->type = TSDB_SQL_RETRIEVE_EMPTY_RESULT;
+    } else {
+      scheduleQuery(pStmt->exec.pRequest, pStmt->sql.pQueryPlan, pStmt->sql.nodeList, NULL);
+    }
   } else {
     STMT_ERR_RET(qBuildStmtOutput(pStmt->sql.pQuery, pStmt->exec.pVgHash, pStmt->exec.pBlockHash));
     launchQueryImpl(pStmt->exec.pRequest, pStmt->sql.pQuery, TSDB_CODE_SUCCESS, true, (autoCreateTbl ? (void**)&pRsp : NULL));

source/libs/parser/src/parInsert.c

@@ -1065,6 +1065,7 @@ static int32_t parseInsertBody(SInsertParseContext* pCxt) {
   int32_t tbNum = 0;
   char tbFName[TSDB_TABLE_FNAME_LEN];
   bool autoCreateTbl = false;
+  STableMeta *pMeta = NULL;
 
   // for each table
   while (1) {
@@ -1119,10 +1120,12 @@ static int32_t parseInsertBody(SInsertParseContext* pCxt) {
     CHECK_CODE(getDataBlockFromList(pCxt->pTableBlockHashObj, tbFName, strlen(tbFName), TSDB_DEFAULT_PAYLOAD_SIZE,
                                     sizeof(SSubmitBlk), getTableInfo(pCxt->pTableMeta).rowSize, pCxt->pTableMeta,
                                     &dataBuf, NULL, &pCxt->createTblReq));
-
+    pMeta = pCxt->pTableMeta;
+    pCxt->pTableMeta = NULL;
+    
     if (TK_NK_LP == sToken.type) {
       // pSql -> field1_name, ...)
-      CHECK_CODE(parseBoundColumns(pCxt, &dataBuf->boundColumnInfo, getTableColumnSchema(pCxt->pTableMeta)));
+      CHECK_CODE(parseBoundColumns(pCxt, &dataBuf->boundColumnInfo, getTableColumnSchema(pMeta)));
       NEXT_TOKEN(pCxt->pSql, sToken);
     }
 
@@ -1158,7 +1161,7 @@ static int32_t parseInsertBody(SInsertParseContext* pCxt) {
       return TSDB_CODE_TSC_OUT_OF_MEMORY;
     }
     memcpy(tags, &pCxt->tags, sizeof(pCxt->tags));
-    (*pCxt->pStmtCb->setInfoFn)(pCxt->pStmtCb->pStmt, pCxt->pTableMeta, tags, tbFName, autoCreateTbl, pCxt->pVgroupsHashObj, pCxt->pTableBlockHashObj);
+    (*pCxt->pStmtCb->setInfoFn)(pCxt->pStmtCb->pStmt, pMeta, tags, tbFName, autoCreateTbl, pCxt->pVgroupsHashObj, pCxt->pTableBlockHashObj);
 
     memset(&pCxt->tags, 0, sizeof(pCxt->tags));
     pCxt->pVgroupsHashObj = NULL;