hubgeter opened a new pull request, #52174:
URL: https://github.com/apache/doris/pull/52174
bp #48723
### What problem does this PR solve?
Problem Summary:
Supports native reader reading tables after the top-level schema of paimon
is changed, but does not support tables after the internal schema of struct is
changed.
change top-level schema(support):
```sql
--spark sql
ALTER TABLE table_name ADD COLUMNS (c1 INT,c2 STRING);
ALTER TABLE table_name RENAME COLUMN c0 TO c1;
ALTER TABLE table_name DROP COLUMNS (c1, c2);
ALTER TABLE table_name ADD COLUMN c INT FIRST;
ALTER TABLE table_name ADD COLUMN c INT AFTER b;
ALTER TABLE table_name ALTER COLUMN col_a FIRST;
ALTER TABLE table_name ALTER COLUMN col_a AFTER col_b;
```
change internal schema of struct schema(not support, will support in the
next PR):
```sql
--spark sql
ALTER TABLE table_name ADD COLUMN v.value.f3 STRING;
ALTER TABLE table_name RENAME COLUMN v.f1 to f100;
ALTER TABLE table_name DROP COLUMN v.value.f3 ;
ALTER TABLE table_name ALTER COLUMN v.col_a FIRST;
```
### 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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