[td-13748] fix bug.

source/client/test/clientTests.cpp

@@ -334,7 +334,7 @@ TEST(testCase, create_ctable_Test) {
   }
   taos_free_result(pRes);
 
-  pRes = taos_query(pConn, "create table tm0 using st1 tags(1)");
+  pRes = taos_query(pConn, "create table tu using sts tags('2021-10-10 1:1:1');");
   if (taos_errno(pRes) != 0) {
     printf("failed to create child table tm0, reason:%s\n", taos_errstr(pRes));
   }

source/libs/parser/src/dCDAstProcess.c

@@ -260,8 +260,11 @@ static int32_t doParseSerializeTagValue(SSchema* pTagSchema, int32_t numOfInputT
     SKvParam param = {.builder = pKvRowBuilder, .schema = pSchema};
 
     SToken* pItem = taosArrayGet(pTagValList, i);
-    code = parseValueToken(&endPtr, pItem, pSchema, tsPrecision, tmpTokenBuf, KvRowAppend, &param, pMsgBuf);
+    if (pSchema->type == TSDB_DATA_TYPE_TIMESTAMP && pItem->z[0] == '\'') {
+      pItem->z += 1;
+    }
 
+    code = parseValueToken(&endPtr, pItem, pSchema, tsPrecision, tmpTokenBuf, KvRowAppend, &param, pMsgBuf);
     if (code != TSDB_CODE_SUCCESS) {
       return buildInvalidOperationMsg(pMsgBuf, msg1);
     }