eldenmoon commented on code in PR #24554:
URL: https://github.com/apache/doris/pull/24554#discussion_r1378913453


##########
be/src/vec/columns/column_nullable.cpp:
##########
@@ -564,9 +564,7 @@ bool ColumnNullable::has_null(size_t size) const {
 }
 
 ColumnPtr make_nullable(const ColumnPtr& column, bool is_nullable) {
-    if (is_column_nullable(*column)) {
-        return column;
-    }
+    if (is_column_nullable(*column) || !column->can_be_inside_nullable()) 
return column;

Review Comment:
   
!can_be_inside_nullable表明这个column一定不是nullable的。make_nullable只是调用了一下。这个一定得确保!can_be_inside_nullable是非nullable的列,否则会挂



##########
be/src/vec/columns/column_nullable.h:
##########
@@ -379,6 +384,8 @@ class ColumnNullable final : public COWHelper<IColumn, 
ColumnNullable> {
 
     ColumnPtr index(const IColumn& indexes, size_t limit) const override;
 
+    bool is_predicate_column() const override { return 
nested_column->is_predicate_column(); }

Review Comment:
   确实,我去掉



##########
be/src/vec/columns/column_nullable.h:
##########
@@ -379,6 +384,8 @@ class ColumnNullable final : public COWHelper<IColumn, 
ColumnNullable> {
 
     ColumnPtr index(const IColumn& indexes, size_t limit) const override;
 
+    bool is_predicate_column() const override { return 
nested_column->is_predicate_column(); }

Review Comment:
   确实,我去掉



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