Use ImmutableList for descriptor map key in parquet

trinodb · Sep 23, 2022 · b37f6a7 · b37f6a7
1 parent 652477f
commit b37f6a7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/trino-parquet/src/main/java/io/trino/parquet/ParquetTypeUtils.java b/lib/trino-parquet/src/main/java/io/trino/parquet/ParquetTypeUtils.java
@@ -52,7 +52,7 @@ private ParquetTypeUtils() {}
 
     public static List<PrimitiveColumnIO> getColumns(MessageType fileSchema, MessageType requestedSchema)
     {
-        return (new ColumnIOFactory()).getColumnIO(requestedSchema, fileSchema, true).getLeaves();
+        return ImmutableList.copyOf((new ColumnIOFactory()).getColumnIO(requestedSchema, fileSchema, true).getLeaves());
     }
 
     public static MessageColumnIO getColumnIO(MessageType fileSchema, MessageType requestedSchema)