luwei16 opened a new pull request, #66664:
URL: https://github.com/apache/doris/pull/66664
### What problem does this PR solve?
Issue Number: close #65865
Related PR: #66553
Problem Summary:
ROW Binlog wraps BEFORE/AFTER value columns in Nullable. PR #53124 removed
the previous nullable HLL conversion and made the HLL OLAP converter reject any
column carrying a null map. Consequently, a user-declared HLL NOT NULL column
still fails when ROW Binlog converts its internal Nullable(HLL) BEFORE/AFTER
representation.
Restore nullable conversion only for this internal representation: serialize
non-null nested HLL values, emit empty slices for null rows, retain the null
map, and preserve the no-nullmap fast path. This does not allow users to define
HLL NULL columns.
### Release note
Fix ROW Binlog writes for NOT NULL HLL columns.
### Check List (For Author)
- Test
- [x] Regression test
- [x] Unit Test
- [ ] Manual test
- [ ] No need to test or manual test.
- Behavior changed:
- [ ] No.
- [x] Yes. ROW Binlog can persist NOT NULL HLL values through its
internal nullable columns.
- Does this need documentation?
- [x] No.
- [ ] Yes.
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