jacktengg opened a new pull request, #11952:
URL: https://github.com/apache/doris/pull/11952
# Proposed changes
Issue Number: close #xxx
## Problem summary
For debug purpose: add session variable agg_as_duplicate, when set to true,
tables of aggregate key model and unique key model will be read as duplicate
key model:
```
mysql> create table t1(a int, b int) engine = olap unique key (a)
distributed by hash(a) buckets 16 properties("replication_allocation" =
"tag.location.default: 1");
Query OK, 0 rows affected (0.28 sec)
mysql> insert into t1 values (1,1),(2,1);
Query OK, 2 rows affected (0.25 sec)
{'label':'insert_e46de5e8df5246d4_ac3d12726252db7b', 'status':'VISIBLE',
'txnId':'2'}
mysql> select * from t1;
+------+------+
| a | b |
+------+------+
| 2 | 1 |
| 1 | 1 |
+------+------+
2 rows in set (0.47 sec)
mysql> insert into t1 values (1,11),(2,11);
Query OK, 2 rows affected (0.17 sec)
{'label':'insert_7c44d5acd7b54bc7_82618edd8eef815b', 'status':'VISIBLE',
'txnId':'3'}
mysql> select * from t1;
+------+------+
| a | b |
+------+------+
| 1 | 11 |
| 2 | 11 |
+------+------+
2 rows in set (0.36 sec)
mysql> show variables like "%agg%";
+-----------------------------------+-------+
| Variable_name | Value |
+-----------------------------------+-------+
| agg_as_duplicate | false |
| disable_streaming_preaggregations | false |
+-----------------------------------+-------+
2 rows in set (0.00 sec)
mysql> set agg_as_duplicate = true;
Query OK, 0 rows affected (0.01 sec)
mysql> select * from t1;
+------+------+
| a | b |
+------+------+
| 2 | 1 |
| 2 | 11 |
| 1 | 1 |
| 1 | 11 |
+------+------+
4 rows in set (0.36 sec)
```
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [ ] No
- [ ] I don't know
2. Has unit tests been added:
- [ ] Yes
- [ ] No
- [ ] No Need
3. Has document been added or modified:
- [ ] Yes
- [ ] No
- [ ] No Need
4. Does it need to update dependencies:
- [ ] Yes
- [ ] No
5. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [ ] No
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[[email protected]](mailto:[email protected]) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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