17a1ce5ed3
[fix](nereids) add a project node above sort node to eliminate unused order by keys ( #17913 )
...
if the order by keys are not simple slot in sort node, the order by exprs have to been added to sort node's output tuple. In that case, we need add a project node above sort node to eliminate the unused order by exprs. for example:
```sql
WITH t0 AS
(SELECT DATE_FORMAT(date,
'%Y%m%d') AS date
FROM cir_1756_t1 ), t3 AS
(SELECT date_format(date,
'%Y%m%d') AS `date`
FROM `cir_1756_t2`
GROUP BY date_format(date, '%Y%m%d')
**ORDER BY date_format(date, '%Y%m%d')** )
SELECT t0.date
FROM t0
LEFT JOIN t3
ON t0.date = t3.date;
```
before:
```
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| Explain String |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| LogicalProject[159] ( distinct=false, projects=[date#1], excepts=[], canEliminate=true ) |
| +--LogicalJoin[158] ( type=LEFT_OUTER_JOIN, markJoinSlotReference=Optional.empty, hashJoinConjuncts=[(date#1 = date#3)], otherJoinConjuncts=[] ) |
| |--LogicalProject[151] ( distinct=false, projects=[date_format(date#0, '%Y%m%d') AS `date`#1], excepts=[], canEliminate=true ) |
| | +--LogicalOlapScan ( qualified=default_cluster:bugfix.cir_1756_t1, indexName=cir_1756_t1, selectedIndexId=412339, preAgg=ON ) |
| +--LogicalSort[157] ( orderKeys=[date_format(cast(date#3 as DATETIME), '%Y%m%d') asc null first] ) |
| +--LogicalAggregate[156] ( groupByExpr=[date#3], outputExpr=[date#3], hasRepeat=false ) |
| +--LogicalProject[155] ( distinct=false, projects=[date_format(date#2, '%Y%m%d') AS `date`#3], excepts=[], canEliminate=true ) |
| +--LogicalOlapScan ( qualified=default_cluster:bugfix.cir_1756_t2, indexName=cir_1756_t2, selectedIndexId=412352, preAgg=ON ) |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
```
after:
```
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| Explain String |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| LogicalProject[171] ( distinct=false, projects=[date#2], excepts=[], canEliminate=true ) |
| +--LogicalJoin[170] ( type=LEFT_OUTER_JOIN, markJoinSlotReference=Optional.empty, hashJoinConjuncts=[(date#2 = date#4)], otherJoinConjuncts=[] ) |
| |--LogicalProject[162] ( distinct=false, projects=[date_format(date#0, '%Y%m%d') AS `date`#2], excepts=[], canEliminate=true ) |
| | +--LogicalOlapScan ( qualified=default_cluster:bugfix.cir_1756_t1, indexName=cir_1756_t1, selectedIndexId=1049812, preAgg=ON ) |
| +--LogicalProject[169] ( distinct=false, projects=[date#4], excepts=[], canEliminate=false ) |
| +--LogicalSort[168] ( orderKeys=[date_format(cast(date#4 as DATETIME), '%Y%m%d') asc null first] ) |
| +--LogicalAggregate[167] ( groupByExpr=[date#4], outputExpr=[date#4], hasRepeat=false ) |
| +--LogicalProject[166] ( distinct=false, projects=[date_format(date#3, '%Y%m%d') AS `date`#4], excepts=[], canEliminate=true ) |
| +--LogicalOlapScan ( qualified=default_cluster:bugfix.cir_1756_t2, indexName=cir_1756_t2, selectedIndexId=1049825, preAgg=ON ) |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
```
2023-03-22 11:19:32 +08:00
