fix: select ins_columns from stb/ctb

source/libs/executor/src/sysscanoperator.c

@@ -547,21 +547,21 @@ static SSDataBlock* sysTableScanUserCols(SOperatorInfo* pOperator) {
       if (schema != NULL) {
         schemaRow = *(SSchemaWrapper**)schema;
       } else {
-        SMetaReader metaReader = {0};
-        metaReaderInit(&metaReader, pInfo->readHandle.meta, 0);
-        int code = metaGetTableEntryByUid(&metaReader, suid);
+        SMetaReader smrSuperTable = {0};
+        metaReaderInit(&smrSuperTable, pInfo->readHandle.meta, 0);
+        int code = metaGetTableEntryByUid(&smrSuperTable, suid);
         if (code != TSDB_CODE_SUCCESS) {
           // terrno has been set by metaGetTableEntryByName, therefore, return directly
           qError("sysTableScanUserCols get meta by suid:%" PRId64 " error, code:%d", suid, code);
-          metaReaderClear(&metaReader);
+          metaReaderClear(&smrSuperTable);
           blockDataDestroy(dataBlock);
           pInfo->loadInfo.totalRows = 0;
           return NULL;
         }
-        SSchemaWrapper* schemaWrapper = tCloneSSchemaWrapper(&metaReader.me.stbEntry.schemaRow);
+        SSchemaWrapper* schemaWrapper = tCloneSSchemaWrapper(&smrSuperTable.me.stbEntry.schemaRow);
         taosHashPut(pInfo->pSchema, &suid, sizeof(int64_t), &schemaWrapper, POINTER_BYTES);
         schemaRow = schemaWrapper;
-        metaReaderClear(&metaReader);
+        metaReaderClear(&smrSuperTable);
       }
     } else if (pInfo->pCur->mr.me.type == TSDB_NORMAL_TABLE) {
       qDebug("sysTableScanUserCols cursor get normal table");

tests/system-test/0-others/information_schema.py

@@ -107,7 +107,6 @@ class TDTestCase:
         for i in range (5):
             self.stb4096 = 'create table db2.stb%d (ts timestamp' % (i)
             for j in range (4094 - i):
-            # for j in range (499):
                 self.stb4096 += ', c%d int' % (j)
             self.stb4096 += ') tags (t1 int)'
             tdSql.execute(self.stb4096)
@@ -125,7 +124,7 @@ class TDTestCase:
             self.ntb4096 += ')'
             tdSql.execute(self.ntb4096)
         tdSql.query(f'select * from information_schema.ins_columns where db_name="db2" and table_type=="NORMAL_TABLE"')
-        tdSql.checkEqual(204700,len(tdSql.queryResult))
+        tdSql.checkEqual(20470,len(tdSql.queryResult))
 
     def run(self):
         self.prepare_data()