hoshinojyunn opened a new pull request, #65549:
URL: https://github.com/apache/doris/pull/65549
### What problem does this PR solve?
Issue Number: N/A
Related PR: N/A
Problem Summary: Multi-segment collection creates a QueryExecutionContext
for each CLucene sub-reader. Copying the root NULL bitmap resolver into that
context lets nullable boolean scorers interpret a table-level NULL bitmap with
local docids. For example, consider two sub-readers with two documents each. In
the first sub-reader, local doc 0 maps to global doc 0 and is NULL. In the
second, local doc 0 maps to global doc 2. The root NULL bitmap is therefore
{0}. For NOT PREFIX(title, "missing"), the second sub-reader incorrectly treats
global bitmap entry 0 as its local doc 0, excludes global doc 2, and
contributes only global doc 3. The collected TRUE bitmap becomes {1,3}; masking
the actual root NULL bitmap {0} cannot restore doc 2, while the correct result
is {1,2,3}. Keep the resolver on the root context only. The collector test
covers this two-sub-reader case and verifies that the final NOT result retains
global doc 2.
### Release note
None
### Check List (For Author)
- Test: Unit Test
- ./run-be-ut.sh --run --filter=MultiSegmentCollectorTest.* -j16
- Behavior changed: Yes (fixes incorrect multi-segment boolean query results
with NULLs)
- Does this need documentation: No
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