[TD-5521]<fix>: [schemaless]id can only contain digits/alphabet/underscore

src/client/src/tscParseLineProtocol.c

@@ -1743,6 +1743,18 @@ static int32_t parseSmlMeasurement(TAOS_SML_DATA_POINT *pSml, const char **index
   return TSDB_CODE_SUCCESS;
 }
 
+//Table name can only contain digits(0-9),alphebet(a-z),underscore(_)
+static int32_t isValidChildTableName(const char *pTbName, int16_t len) {
+  const char *cur = pTbName;
+  for (int i = 0; i < len; ++i) {
+    if(!isdigit(cur[i]) && !isalpha(cur[i]) && cur[i] != '_') {
+      return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+    }
+  }
+  return TSDB_CODE_SUCCESS;
+}
+
+
 static int32_t parseSmlKvPairs(TAOS_SML_KV **pKVs, int *num_kvs,
                                const char **index, bool isField, TAOS_SML_DATA_POINT* smlData) {
   const char *cur = *index;
@@ -1776,6 +1788,10 @@ static int32_t parseSmlKvPairs(TAOS_SML_KV **pKVs, int *num_kvs,
     }
     if (!isField &&
         (strcasecmp(pkv->key, "ID") == 0) && pkv->type == TSDB_DATA_TYPE_BINARY) {
+      ret = isValidChildTableName(pkv->value, pkv->length);
+      if (!ret) {
+        goto error;
+      }
       smlData->childTableName = malloc( pkv->length + 1);
       memcpy(smlData->childTableName, pkv->value, pkv->length);
       smlData->childTableName[pkv->length] = '\0';