fix error, there is a core dump if tag equals a long num in where condition...

fix error, there is a core dump if tag equals a long num in where condition like where tag=99999999999999999999

src/client/src/tscSQLParser.c

@@ -9821,6 +9821,9 @@ int32_t exprTreeFromSqlExpr(SSqlCmd* pCmd, tExprNode **pExpr, const tSqlExpr* pS
     assert(pSqlExpr->pRight == NULL);
 
     if (pSqlExpr->type == SQL_NODE_VALUE) {
+      if(!isValidDataType(pSqlExpr->value.nType)){
+        return TSDB_CODE_TSC_INVALID_VALUE;
+      }
       int32_t ret = TSDB_CODE_SUCCESS;
       *pExpr = calloc(1, sizeof(tExprNode));
       (*pExpr)->nodeType = TSQL_NODE_VALUE;

src/common/inc/tvariant.h

@@ -25,7 +25,7 @@ extern "C" {
 
 // variant, each number/string/field_id has a corresponding struct during parsing sql
 typedef struct tVariant {
-  uint32_t nType;
+  int32_t nType;      // change uint to int, because in tVariantCreate() pVar->nType = -1;   // -1 means error type
   int32_t  nLen;  // only used for string, for number, it is useless
   union {
     int64_t  i64;

src/common/src/tvariant.c

@@ -285,7 +285,7 @@ void tVariantAssign(tVariant *pDst, const tVariant *pSrc) {
       }
   }
 
-  if (pDst->nType != TSDB_DATA_TYPE_POINTER_ARRAY && pDst->nType != TSDB_DATA_TYPE_VALUE_ARRAY) {
+  if (pDst->nType != TSDB_DATA_TYPE_POINTER_ARRAY && pDst->nType != TSDB_DATA_TYPE_VALUE_ARRAY && isValidDataType(pDst->nType)) { // if pDst->nType=-1, core dump. eg: where intcolumn=999999999999999999999999999
     pDst->nLen = tDataTypes[pDst->nType].bytes;
   }
 }