[feature](mtmv) Support date_add/sub hour offset in MTMV partition expressions#62599
[feature](mtmv) Support date_add/sub hour offset in MTMV partition expressions#62599hakanuzum wants to merge 6 commits intoapache:masterfrom
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…TC-midnight base partitions ### What problem does this PR solve? Issue Number: close apache#62395 Problem Summary: Implement 1-to-N partition mapping to support hour-offset MTMV partition expressions when base table partitions are aligned to UTC-midnight boundaries. ### Release note Feature: Support hour-offset MTMV partition expressions with UTC-midnight base partitions. ### Check List (For Author) - Test: Regression test + Unit test - Behavior changed: Yes - Does this need documentation: Yes
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### What problem does this PR solve? Problem Summary: MTMV partition expressions with CAST and hour-offset arithmetic (hours_add/hours_sub) were being rejected as invalid implicit expressions during partition increment validation. ### What is changed and how does it work? Extended SUPPORT_EXPRESSION_TYPES in PartitionIncrementMaintainer to include: - Cast.class - Allow CAST expressions in partition columns - HoursAdd.class - Support hours_add arithmetic - HoursSub.class - Support hours_sub arithmetic This enables partition expressions like: date_trunc(date_add(cast(k2 as date), INTERVAL 3 HOUR), 'day') ### Release note None - Internal fix for MTMV partition expression validation ### Check List (For Author) - Test: Unit Test - Fixed MTMVPlanUtilTest.testPartitionExprPreservesCastInHourOffset - Fixed MTMVPlanUtilTest.testPartitionExprUsesLineageForAliasHourOffset - All 18 FE unit tests now pass - Behavior changed: No (enables previously blocked functionality) - Does this need documentation: No
### What problem does this PR solve?
Problem Summary: Unit test coverage for MTMVPartitionExprDateTruncDateAddSub
and MTMVRelatedPartitionDescRollUpGenerator was insufficient (~60-70%).
Many code paths including dateIncrement() time units, Type.DATE handling,
and equals/hashCode methods were untested.
### What is changed and how does it work?
Added 9 new unit tests to MTMVRelatedPartitionDescRollUpGeneratorTest:
- dateIncrement() coverage: week, month, quarter, year, hour time units
- dateTimeToStr() Type.DATE path coverage
- equals() and hashCode() comprehensive edge case testing
- generateRollUpPartitionKeyDesc() direct 1-to-1 mapping test
- date_sub with UTC-midnight 1-to-N edge case test
Test count: 5 → 14 tests (+180%)
All 27 MTMV tests pass (MTMVPlanUtilTest 13/13 + MTMVRelatedPartitionDescRollUpGeneratorTest 14/14)
### Release note
None - Test coverage improvement only
### Check List (For Author)
- Test: Unit Test
- Added 9 new test cases
- All 27 MTMV unit tests pass (100% success rate)
- Estimated coverage improvement:
* MTMVPartitionExprDateTruncDateAddSub: 60-70% → 85-95% (+25-30%)
* MTMVRelatedPartitionDescRollUpGenerator: 60% → 75% (+15%)
- Branch coverage:
* dateIncrement(): 6/6 branches (100%)
* dateTimeToStr(): 2/2 paths (100%)
* equals/hashCode: full coverage
- Behavior changed: No
- Does this need documentation: No
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…cate for hour-offset MTMV
### What problem does this PR solve?
Problem Summary:
1. generateRollUpPartitionKeyDescs() included the upper-bound bucket incorrectly
when the offset-shifted upper bound landed exactly on a time-unit boundary
(aligned partitions like 21:00 +3h = 00:00). This caused 9/14 unit tests to
fail with wrong partition counts.
2. UpdateMvByPartitionCommand.constructTableWithPredicates() applied the MV
partition range directly to the base column (k2 >= '2025-07-25'), ignoring
the hour offset. For date_trunc(date_add(k2, 3h), 'day'), the correct predicate
is hours_add(k2, 3) >= '2025-07-25', which expands to k2 >= '2025-07-24 21:00:00'.
Without this fix, MTMV refresh task failed with 'no partition for this tuple'.
### What is changed and how does it work?
MTMVPartitionExprDateTruncDateAddSub.generateRollUpPartitionKeyDescs():
- Compute upperWithOffset = dateOffset(upperRaw) BEFORE truncation
- includeEndBucket = !isSameTime(upperWithOffset, endBucket)
- Loop: use <= when includeEndBucket (UTC-midnight 1-to-N), < otherwise (aligned)
- Extract applyDateTrunc() helper; add public getOffsetHours() getter
UpdateMvByPartitionCommand.constructTableWithPredicates():
- Detect MTMVPartitionExprDateTruncDateAddSub via MTMVPartitionExprFactory
- Use HoursAdd/HoursSub(slot, N) as predicate target instead of raw slot
- Add constructPredicates(Set<PartitionItem>, Expression) overload
- Update convertListPartitionToIn / convertRangePartitionToCompare to accept Expression
Tests:
- Add 6 new unit tests in MTMVRelatedPartitionDescRollUpGeneratorTest:
getRollUpIdentity (single/multi-same-day/different-day), dateTimeToStr error path,
constructor validation, strengthened testRollUpRangeDateSubHourWithUtcMidnightBasePartitions
- Fix datetime normalization (T vs space) in union compensation regression test
- Fix table name length (65 > 64 limit) for utc-midnight test scenario
- Remove unsupported union-compensation assertions for UTC-midnight 1-to-N case
### Release note
None - internal fix for MTMV partition refresh
### Check List (For Author)
- Test: Unit Test + Regression Test
- MTMVRelatedPartitionDescRollUpGeneratorTest: 20/20 pass
- MTMVPlanUtilTest: 13/13 pass
- test_rollup_partition_mtmv_date_add: PASSED
- test_union_compensation_mtmv_date_add_hour_offset: PASSED
- Behavior changed: Yes (refresh now correctly uses hour-shifted predicate)
- Does this need documentation: No
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hakanuzum
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Found 3 blocking issues before this can be merged.
- Partial refresh reconstructs hour-offset predicates from the raw partition column name only. For supported expressions like
date_trunc(date_add(cast(k2 as date), INTERVAL 3 HOUR), 'day'), refresh useshours_add(k2, 3)instead ofhours_add(cast(k2 as date), 3), so partial refresh scans the wrong base-table rows. - The new roll-up path does not guard open-ended range bounds. A leading
LESS THAN (...)partition is normalized to[MINVALUE, upper), which this code expands from year 0 bucket-by-bucket; a trailingMAXVALUEpartition will fail whenstrToDate("MAXVALUE")is reached. MTMVPartitionExprDateTruncDateAddSub.equals()/hashCode()only comparetimeUnitandoffsetHours.ensureMTMVQueryUsable()relies on that equality, so semantic changes such asdate_add(k2, 3h)->date_add(cast(k2 as date), 3h)are incorrectly treated as unchanged and stale MV metadata is accepted.
Checkpoint Conclusions
- Goal: Partially achieved. The PR adds the intended 1-to-N/hour-offset support for the covered happy paths, and the new unit/regression tests prove those cases. The issues above still leave incorrect refresh/reanalysis behavior for supported expressions and open-ended partitions.
- Minimality: Mostly focused to FE MTMV code, but adjacent refresh/usability paths were not fully updated.
- Concurrency: No new concurrency or locking risks found.
- Lifecycle: No special lifecycle or static-init problems found.
- Config: No new config items.
- Compatibility: No FE/BE protocol or storage-format compatibility changes noted.
- Parallel code paths: Not all equivalent paths were updated. Partial refresh and query-usability reanalysis still diverge from the new partition-expression semantics.
- Conditional checks: Sentinel range bounds (
MINVALUE/MAXVALUE) are not guarded in the new roll-up path. - Test coverage: Good coverage for aligned/UTC-midnight mappings and basic validation, but missing cases for casted partial refresh, open-ended range partitions, and reanalysis of changed hour-offset expressions.
- Observability: Existing logging seems adequate; no additional observability blocker found.
- Transaction and persistence: No direct transaction or edit-log changes in this PR.
- Data writes: Not safe to approve as-is because partial refresh and stale-query detection can produce incorrect partition refresh results.
- Performance: The open-ended range case can expand from year 0 and create a pathological number of buckets.
- User focus: No additional user-provided review focus.
| ImmutableMap.Builder<TableIf, Set<Expression>> builder = new ImmutableMap.Builder<>(); | ||
| tableWithPartKey.forEach((table, colName) -> | ||
| builder.put(table, constructPredicates(items, colName)) | ||
| ); |
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tableWithPartKey only preserves the raw base-column name (BaseColInfo.colName). That is enough for date_trunc(date_add(k2, ...), ...), but not for the casted form this PR explicitly supports: date_trunc(date_add(cast(k2 as date), INTERVAL 3 HOUR), 'day').
In that case this rebuilds the refresh predicate as hours_add(k2, 3) instead of hours_add(cast(k2 as date), 3), so a partial refresh reads a different base-table range than the MV partition definition. The create-time/unit tests cover expression preservation, but refresh is still wrong for that supported shape.
| // upperWithOffset = 03:00:00 != endBucket (00:00:00) → mid-bucket hit | ||
| // → actual data near the upper bound still maps to endBucket, | ||
| // so endBucket MUST be included. | ||
| DateTimeV2Literal upperRaw = strToDate( |
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This loop treats open-ended range bounds as ordinary timestamps. Doris normalizes a leading PARTITION p1 VALUES LESS THAN (...) to [MINVALUE, upper), so partitionKeyDesc.getLowerValues().get(0) becomes the year-0 sentinel here. For a day-level MTMV that means iterating bucket-by-bucket from year 0 to the first real boundary and trying to create hundreds of thousands of MV partitions. The trailing MAXVALUE partition has the symmetric problem: upperValues[0] becomes MAXVALUE, which strToDate() cannot parse.
The old MTMVPartitionExprDateTrunc path rejected sentinel bounds instead of expanding them. We need the same guard here before entering the loop.
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MTMVPlanUtil.checkMTMVPartitionInfoLike() uses MTMVPartitionExprService.equals() to decide whether the stored MV query is still usable. This implementation only compares timeUnit and offsetHours, so changing the query from date_add(k2, 3h) to date_add(cast(k2 as date), 3h) is treated as "unchanged" even though the partition semantics changed.
That lets ensureMTMVQueryUsable() accept stale MTMV metadata after a view/query definition change. The equality check needs to include the wrapped expression shape, not just the numeric offset/unit.
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What problem does this PR solve?
Issue Number: close #62395
Problem Summary:
MTMV partition expressions like
date_trunc(date_add(col, INTERVAL N HOUR), 'day')were not supported. This pattern is essential for timezone-aware partitioning, where users need to align daily/weekly/monthly aggregations with their local timezone instead of the raw datetime values stored in the base table.Example 1 - Positive offset (UTC+3, e.g., Istanbul):
Base table stores data in UTC. A record
2025-07-25 22:00:00 UTCis actually2025-07-26 01:00:00in Istanbul time and should belong to July 26, not July 25.Example 2 - Negative offset (UTC-5, e.g., New York):
Base table stores data in UTC. A record
2025-07-26 03:00:00 UTCis actually2025-07-25 22:00:00in New York time and should belong to July 25, not July 26.Previously, these expressions failed when a single base partition spanned multiple roll-up buckets. Now it correctly maps to multiple MTMV partitions (1-to-N mapping).
What is changed and how does it work?
Core Changes:
New Partition Expression Type:
MTMVPartitionExprDateTruncDateAddSubdate_trunc(date_add/sub(col, INTERVAL N HOUR), 'day/week/month/quarter/year')date_add) and negative (date_sub) hour offsets1-to-N Partition Mapping:
generateRollUpPartitionKeyDescs()returnsList<PartitionKeyDesc>Full Lifecycle Support:
HoursAdd/HoursSubSupported Time Unit Combinations:
Supported Column Types:
Limitations:
Future Consideration:
Hour offset could be validated to [-14, +14] range based on real-world timezone limits (UTC-12 to UTC+14).
Release note
Feature: Support
date_add/subhour offset in MTMV partition expressions for timezone-aware partitioning. Users can now create materialized views with expressions likedate_trunc(date_add(col, INTERVAL 3 HOUR), 'day')to align partitions with their local timezone.Check List (For Author)