From c6badaec9152b7fc466d623b20ad698249bd0681 Mon Sep 17 00:00:00 2001
From: turbo jason <37113176+Wsyzxxn@users.noreply.github.com>
Date: Mon, 6 Jan 2020 18:31:40 +0800
Subject: [PATCH] Fix bug: CreateIndexClause can be casted to AlterTableClause
 (#2667)

---
 .../main/java/org/apache/doris/analysis/CreateIndexClause.java | 3 ++-
 .../main/java/org/apache/doris/analysis/DropIndexClause.java   | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/fe/src/main/java/org/apache/doris/analysis/CreateIndexClause.java b/fe/src/main/java/org/apache/doris/analysis/CreateIndexClause.java
index 7c9d561546..97187f4c79 100644
--- a/fe/src/main/java/org/apache/doris/analysis/CreateIndexClause.java
+++ b/fe/src/main/java/org/apache/doris/analysis/CreateIndexClause.java
@@ -24,7 +24,7 @@ import com.google.common.collect.Maps;
 
 import java.util.Map;
 
-public class CreateIndexClause extends AlterClause {
+public class CreateIndexClause extends AlterTableClause {
     // in which table the index on, only used when alter = false
     private TableName tableName;
     // index definition class
@@ -39,6 +39,7 @@ public class CreateIndexClause extends AlterClause {
         this.tableName = tableName;
         this.indexDef = indexDef;
         this.alter = alter;
+        this.needTableStable = true;
     }
 
     @Override
diff --git a/fe/src/main/java/org/apache/doris/analysis/DropIndexClause.java b/fe/src/main/java/org/apache/doris/analysis/DropIndexClause.java
index dce318a1ff..40d566549a 100644
--- a/fe/src/main/java/org/apache/doris/analysis/DropIndexClause.java
+++ b/fe/src/main/java/org/apache/doris/analysis/DropIndexClause.java
@@ -24,7 +24,7 @@ import org.apache.commons.lang.StringUtils;
 
 import java.util.Map;
 
-public class DropIndexClause extends AlterClause {
+public class DropIndexClause extends AlterTableClause {
     private final String indexName;
     private final TableName tableName;
     private boolean alter;
@@ -33,6 +33,7 @@ public class DropIndexClause extends AlterClause {
         this.indexName = indexName;
         this.tableName = tableName;
         this.alter = alter;
+        this.needTableStable = true;
     }
 
     public String getIndexName() {