seawinde fda001b6d3
[Improvement](nereids) Support join derivation when mv rewrite ( #29609 ) ...
materialized view def is as following:
> select l_linenumber, o_custkey
> from orders
> left join lineitem on lineitem.L_ORDERKEY = orders.O_ORDERKEY
> where o_custkey = 1;
when query is as following, it can be rewritten by mv above
it requires that query has reject null filters on the join right input,
current supported filter are "=", "<", "<=", ">", ">=", "<=>"
> select IFNULL(orders.O_CUSTKEY, 0) as custkey_not_null,
> case when l_linenumber in (1,2,3) then l_linenumber else o_custkey end as case_when
> from orders
> inner join lineitem on orders.O_ORDERKEY = lineitem.L_ORDERKEY
> where o_custkey = 1 and l_linenumber > 0;
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