morrySnow commented on code in PR #49041:
URL: https://github.com/apache/doris/pull/49041#discussion_r2053853552


##########
fe/fe-core/src/main/java/org/apache/doris/alter/Alter.java:
##########
@@ -809,16 +818,26 @@ private void replaceTableInternal(Database db, OlapTable 
origTable, OlapTable ne
         String newTblName = newTbl.getName();
         // drop origin table and new table
         db.unregisterTable(oldTblName);
+        if (origTable.getType() == TableType.MATERIALIZED_VIEW) {
+            Env.getCurrentEnv().getMtmvService().deregisterMTMV((MTMV) 
origTable);

Review Comment:
   if they have the same meaning, why use two different words?



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