diff --git a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
index aaa01c78db..5bfc465b30 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/nereids/parser/LogicalPlanBuilder.java
@@ -2453,7 +2453,7 @@ public class LogicalPlanBuilder extends DorisParserBaseVisitor<Object> {
         String indexName = ctx.indexName.getText();
         List<String> indexCols = visitIdentifierList(ctx.cols);
         Map<String, String> properties = visitPropertyItemList(ctx.properties);
-        String indexType = ctx.indexType != null ? ctx.indexType.getText() : null;
+        String indexType = ctx.indexType != null ? ctx.indexType.getText().toUpperCase() : null;
         String comment = ctx.comment != null ? ctx.comment.getText() : "";
         return new IndexDefinition(indexName, indexCols, indexType, properties, comment);
     }