[TD-14342]<fix> fix error if nchar condition in subquery like "select * from...

[TD-14342]<fix> fix error if nchar condition in subquery like "select * from (select * from table) where nchar = '0'"

src/query/src/qFilter.c

@@ -3611,7 +3611,7 @@ int32_t filterConverNcharColumns(SFilterInfo* info, int32_t rows, bool *gotNchar
         if(isNull(src, TSDB_DATA_TYPE_NCHAR)){
           varDataCopy(dst, src);
           continue;
-        }gi
+        }
         int32_t len = 0;
         bool ret = taosMbsToUcs4(varDataVal(src), varDataLen(src), varDataVal(dst), bufSize, &len);
         if(!ret) {

tests/pytest/query/nestedQuery/nestedQuery_datacheck.py

@@ -619,9 +619,11 @@ class TDTestCase:
             sql += "%s )" % random.choice(t_join_where)
             datacheck = self.stable_join_checkall_0(sql)           
             tdSql.checkRows(100)
-            datacheck = self.stable_join_checkall_100(sql)       
- 
+            datacheck = self.stable_join_checkall_100(sql)
 
+            # for TD-14342
+            sql = "select  * from  ( select  * from stable_1 ) where t_nchar like 'nchar%' or t_nchar = '0'"
+            datacheck = self.stable1_checkall_0(sql)
         endTime = time.time()
         print("total time %ds" % (endTime - startTime))