seawinde opened a new pull request, #29227:
URL: https://github.com/apache/doris/pull/29227
## Proposed changes
Fix query rewrite by mv fail when self join, after fix query like following
can be rewrited
> def materialized view = """
> select
> a.o_orderkey,
> count(distinct a.o_orderstatus) num1,
> SUM(CASE WHEN a.o_orderstatus = 'o' AND a.o_shippriority = 1 AND
a.o_orderdate = '2023-12-08' AND b.o_orderdate = '2023-12-09' THEN
a.o_shippriority+b.o_custkey ELSE 0 END) num2,
> SUM(CASE WHEN a.o_orderstatus = 'o' AND a.o_shippriority = 1 AND
a.o_orderdate >= '2023-12-01' AND a.o_orderdate <= '2023-12-09' THEN
a.o_shippriority+b.o_custkey ELSE 0 END) num3,
> SUM(CASE WHEN a.o_orderstatus = 'o' AND a.o_shippriority in (1,2) AND
a.o_orderdate >= '2023-12-08' AND b.o_orderdate <= '2023-12-09' THEN
a.o_shippriority-b.o_custkey ELSE 0 END) num4,
> AVG(a.o_totalprice) num5,
> MAX(b.o_totalprice) num6,
> MIN(a.o_totalprice) num7
> from
> orders a
> left outer join orders b
> on a.o_orderkey = b.o_orderkey
> and a.o_custkey = b.o_custkey
> group by a.o_orderkey;
> """
```
def query = """
select
a.o_orderkey,
SUM(CASE WHEN a.o_orderstatus = 'o' AND a.o_shippriority = 1 AND
a.o_orderdate = '2023-12-08' AND b.o_orderdate = '2023-12-09' THEN
a.o_shippriority+b.o_custkey ELSE 0 END) num2,
SUM(CASE WHEN a.o_orderstatus = 'o' AND a.o_shippriority = 1 AND
a.o_orderdate >= '2023-12-01' AND a.o_orderdate <= '2023-12-09' THEN
a.o_shippriority+b.o_custkey ELSE 0 END) num3,
SUM(CASE WHEN a.o_orderstatus = 'o' AND a.o_shippriority in (1,2) AND
a.o_orderdate >= '2023-12-08' AND b.o_orderdate <= '2023-12-09' THEN
a.o_shippriority-b.o_custkey ELSE 0 END) num4,
AVG(a.o_totalprice) num5,
MAX(b.o_totalprice) num6,
MIN(a.o_totalprice) num7
from
orders a
left outer join orders b
on a.o_orderkey = b.o_orderkey
and a.o_custkey = b.o_custkey
group by a.o_orderkey;
"""
```
## 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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