9fc613de9c
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;
"""
新加case注意事项
-
变量名前要写 def，否则是全局变量，并行跑的 case 的时候可能被其他 case 影响。
Problematic code:
ret = ***Correct code:
def ret = *** -
尽量不要在 case 中 global 的设置 session variable，或者修改集群配置，可能会影响其他 case。
Problematic code:
sql """set global enable_pipeline_x_engine=true;"""Correct code:
sql """set enable_pipeline_x_engine=true;""" -
如果必须要设置 global，或者要改集群配置，可以指定 case 以 nonConcurrent 的方式运行。
-
case 中涉及时间相关的，最好固定时间，不要用类似 now() 函数这种动态值，避免过一段时间后 case 就跑不过了。
Problematic code:
sql """select count(*) from table where created < now();"""Correct code:
sql """select count(*) from table where created < '2023-11-13';"""