cambyzju opened a new pull request, #59340: URL: https://github.com/apache/doris/pull/59340
### What problem does this PR solve?
**Usage Example:**
```
> select * from test_pk@ro where user_id=9820660;
+---------+----------+
| user_id | behavior |
+---------+----------+
| 9820660 | hello |
+---------+----------+
```
- When there are overlapping key ranges in Paimon Primary Key table, we
cannot use native reader:
```
> explain verbose select * from test_pk where user_id=9820660;
+------------------------------------------------------------------------------------------------------------------------+
| Explain String(Nereids Planner)
|
+------------------------------------------------------------------------------------------------------------------------+
| PLAN FRAGMENT 0
|
| OUTPUT EXPRS:
|
| user_id[#0]
|
| behavior[#1]
|
| PARTITION: UNPARTITIONED
|
|
|
| HAS_COLO_PLAN_NODE: false
|
|
|
| VRESULT SINK
|
| MYSQL_PROTOCAL
|
|
|
| 1:VEXCHANGE
|
| offset: 0
|
| distribute expr lists:
|
| tuple ids: 0
|
|
|
| PLAN FRAGMENT 1
|
|
|
| PARTITION: RANDOM
|
|
|
| HAS_COLO_PLAN_NODE: false
|
|
|
| STREAM DATA SINK
|
| EXCHANGE ID: 01
|
| UNPARTITIONED
|
|
|
| 0:VPAIMON_SCAN_NODE(79)
|
| table: paimon_on_s3.db_paimon.test_pk
|
| predicates: (user_id[#0] = 9820660)
|
| inputSplitNum=1, totalFileSize=0, scanRanges=1
|
| partition=1/0
|
| backends:
|
| 1754986988417
|
| /data-0891318b-4e3b-42b5-b85c-3bc8e9b8cc45-0.parquet start: 0
length: 0 |
| cardinality=1001, numNodes=1
|
| pushdown agg=NONE
|
| paimonNativeReadSplits=0/1
|
| predicatesFromPaimon:
|
| Equal(user_id, 9820660)
|
| PaimonTable: test_pk
|
| PaimonSplitStats:
|
| SplitStat [type=JNI, rowCount=1001, mergedRowCount=NONE,
rawFileConvertable=false, hasDeletionVector=false] |
| tuple ids: 0
|
|
|
| Tuples:
|
| TupleDescriptor{id=0, tbl=test_pk}
|
| SlotDescriptor{id=0, col=user_id, colUniqueId=0, type=bigint,
nullable=true, isAutoIncrement=false, subColPath=null} |
| SlotDescriptor{id=1, col=behavior, colUniqueId=1, type=text,
nullable=true, isAutoIncrement=false, subColPath=null} |
|
|
|
|
|
|
|
|
| ========== STATISTICS ==========
|
| planed with unknown column statistics
|
+------------------------------------------------------------------------------------------------------------------------+
```
- But if we try to read `ro` table, we could use the Native reader with some
data latency:
```
> explain verbose select * from test_pk@ro where user_id=9820660;
+--------------------------------------------------------------------------------------------------------------------------------------+
| Explain String(Nereids Planner)
|
+--------------------------------------------------------------------------------------------------------------------------------------+
| PLAN FRAGMENT 0
|
| OUTPUT EXPRS:
|
| user_id[#0]
|
| behavior[#1]
|
| PARTITION: UNPARTITIONED
|
|
|
| HAS_COLO_PLAN_NODE: false
|
|
|
| VRESULT SINK
|
| MYSQL_PROTOCAL
|
|
|
| 1:VEXCHANGE
|
| offset: 0
|
| distribute expr lists:
|
| tuple ids: 0
|
|
|
| PLAN FRAGMENT 1
|
|
|
| PARTITION: RANDOM
|
|
|
| HAS_COLO_PLAN_NODE: false
|
|
|
| STREAM DATA SINK
|
| EXCHANGE ID: 01
|
| UNPARTITIONED
|
|
|
| 0:VPAIMON_SCAN_NODE(79)
|
| table: paimon_on_s3.db_paimon.test_pk
|
| predicates: (user_id[#0] = 9820660)
|
| inputSplitNum=1, totalFileSize=519490, scanRanges=1
|
| partition=1/0
|
| backends:
|
| 1754986988417
|
|
s3://warehouse/wh/db_paimon.db/test_pk/bucket-0/data-1ae9ee1e-e6aa-4594-9506-75b6b6ad3820-0.parquet
start: 0 length: 519490 |
| cardinality=1001, numNodes=1
|
| pushdown agg=NONE
|
| paimonNativeReadSplits=1/1
|
| predicatesFromPaimon:
|
| Equal(user_id, 9820660)
|
| PaimonTable: test_pk$ro
|
| PaimonSplitStats:
|
| SplitStat [type=NATIVE, rowCount=1000, mergedRowCount=NONE,
rawFileConvertable=true, hasDeletionVector=false] |
| tuple ids: 0
|
|
|
| Tuples:
|
| TupleDescriptor{id=0, tbl=test_pk}
|
| SlotDescriptor{id=0, col=user_id, colUniqueId=0, type=bigint,
nullable=true, isAutoIncrement=false, subColPath=null} |
| SlotDescriptor{id=1, col=behavior, colUniqueId=1, type=text,
nullable=true, isAutoIncrement=false, subColPath=null} |
|
|
|
|
|
|
|
|
| ========== STATISTICS ==========
|
| planed with unknown column statistics
|
+--------------------------------------------------------------------------------------------------------------------------------------+
```
### 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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