[td-168] fix bug in var string

src/kit/shell/src/shellEngine.c

@@ -613,7 +613,7 @@ int shellDumpResult(TAOS *con, char *fname, int *error_no, bool printMode) {
               case TSDB_DATA_TYPE_BINARY:
               case TSDB_DATA_TYPE_NCHAR:
                 memset(t_str, 0, TSDB_MAX_BYTES_PER_ROW);
-                memcpy(t_str, row[i], fields[i].bytes);
+                memcpy(t_str, row[i], length[i]);
                 fprintf(fp, "\'%s\'", t_str);
                 break;
               case TSDB_DATA_TYPE_TIMESTAMP:

tests/tsim/src/simExe.c

@@ -676,6 +676,8 @@ bool simExecuteNativeSqlCommand(SScript *script, char *rest, bool isSlow) {
     while ((row = taos_fetch_row(result))) {
       if (numOfRows < MAX_QUERY_ROW_NUM) {
         TAOS_FIELD *fields = taos_fetch_fields(result);
+        int* length = taos_fetch_lengths(result);
+        
         for (int i = 0; i < num_fields; i++) {
           char *value = NULL;
           if (i < MAX_QUERY_COL_NUM) {
@@ -733,8 +735,8 @@ bool simExecuteNativeSqlCommand(SScript *script, char *rest, bool isSlow) {
               break;
             case TSDB_DATA_TYPE_BINARY:
             case TSDB_DATA_TYPE_NCHAR:
-              memcpy(value, row[i], fields[i].bytes);
-              value[fields[i].bytes] = 0;
+              memcpy(value, row[i], length[i]);
+              value[length[i]] = 0;
               // snprintf(value, fields[i].bytes, "%s", (char *)row[i]);
               break;
             case TSDB_DATA_TYPE_TIMESTAMP: