clairemcginty commented on code in PR #1328:
URL: https://github.com/apache/parquet-mr/pull/1328#discussion_r1606767983


##########
parquet-column/src/main/java/org/apache/parquet/internal/column/columnindex/ColumnIndexBuilder.java:
##########
@@ -368,6 +369,20 @@ public <T extends Comparable<T>> PrimitiveIterator.OfInt 
visit(NotIn<T> notIn) {
       return IndexIterator.all(getPageCount());
     }
 
+    @Override
+    public <T extends Comparable<T>> PrimitiveIterator.OfInt visit(Contains<T> 
contains) {

Review Comment:
   Makes sense. I'll look into doing an intersection/union operation here. Or 
otherwise just fall back to not filtering and returning `IndexIterator.all`.



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