diff --git a/src/client/src/tscParseLineProtocol.c b/src/client/src/tscParseLineProtocol.c
index 98d9c3ec655b519fc3077c7ced525a90457632c5..e0aa2b432744f43fb1fd951c646975bab37eef75 100644
--- a/src/client/src/tscParseLineProtocol.c
+++ b/src/client/src/tscParseLineProtocol.c
@@ -1824,6 +1824,7 @@ int taos_insert_lines(TAOS* taos, char* lines[], int numLines) {
 cleanup:
   tscDebug("taos_insert_lines finish inserting %d lines. code: %d", numLines, code);
   points = TARRAY_GET_START(lpPoints);
+  numPoints = taosArrayGetSize(lpPoints);
   for (int i=0; i<numPoints; ++i) {
     destroySmlDataPoint(points+i);
   }
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 5bd981d379da098b2a8379c615b0842674252a7f..39b1a5e8d3ce6e86d51a760f65f21052ced3b17c 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -6066,11 +6066,11 @@ int32_t setAlterTableInfo(SSqlObj* pSql, struct SSqlInfo* pInfo) {
       return invalidOperationMsg(pMsg, msg22);
     }
 
-    SSchema* pSchema = (SSchema*) pTableMetaInfo->pTableMeta->schema;
-    int16_t numOfColumns = pTableMetaInfo->pTableMeta->tableInfo.numOfColumns;
+    SSchema* pSchema = tscGetTableTagSchema(pTableMetaInfo->pTableMeta);
+    int16_t numOfTags = tscGetNumOfTags(pTableMetaInfo->pTableMeta);
     int16_t i;
     uint32_t nLen = 0;
-    for (i = 0; i < numOfColumns; ++i) {
+    for (i = 0; i < numOfTags; ++i) {
       nLen += pSchema[i].colId != columnIndex.columnIndex ? pSchema[i].bytes : pItem->bytes;
     }
     if (nLen >= TSDB_MAX_TAGS_LEN) {