Mryange opened a new pull request, #48288:
URL: https://github.com/apache/doris/pull/48288
### What problem does this PR solve?
error code
```
ColumnPtr nested_column = column;
if (column) {
nested_column = nested_column->convert_to_full_column_if_const();
const auto* source_column = assert_cast<const
ColumnNullable*>(nested_column.get());
nested_column = source_column->get_nested_column_ptr();
```
If column is a const(nullable) column,
execute: nested_column = nested_column->convert_to_full_column_if_const();
nested_column points to a new nullable column.
Execute: const auto* source_column = assert_cast<const
ColumnNullable*>(nested_column.get());
source_column, this raw pointer, points to the new nullable column (but does
not have ownership).
Execute: nested_column = source_column->get_nested_column_ptr();
nested_column points to the nested column of the new nullable column, and
the original nullable column is released.
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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