materialized view definition is
> select
> sum(o_totalprice) as sum_total,
> max(o_totalprice) as max_total,
> min(o_totalprice) as min_total,
> count(*) as count_all,
> bitmap_union(to_bitmap(case when o_shippriority > 1 and o_orderkey IN (1, 3) then o_custkey else null end)) >cnt_1,
> bitmap_union(to_bitmap(case when o_shippriority > 2 and o_orderkey IN (2) then o_custkey else null end)) as >cnt_2
> from lineitem
> left join orders on l_orderkey = o_orderkey and l_shipdate = o_orderdate;
the query following can be rewritten by materialized view above.
it use the aggregate fuction arithmetic calculation in the select
> select
> count(distinct case when O_SHIPPRIORITY > 2 and o_orderkey IN (2) then o_custkey else null end) as cnt_2,
> (sum(o_totalprice) + min(o_totalprice)) * count(*),
> min(o_totalprice) + count(distinct case when O_SHIPPRIORITY > 2 and o_orderkey IN (2) then o_custkey else null >end)
> from lineitem
> left join orders on l_orderkey = o_orderkey and l_shipdate = o_orderdate;
the target expression should be:
1. only one numeric slot, or
2. cast for any data type
example:
select * from T1 join T2 on abs(T1.a) = T2.a
RF T2.a->abs(T1.a)
* Similar to https://github.com/apache/doris/pull/30337
* Between branch-1.2-lts and branch-2.1, `FrontendHbResponse` has upgrade
compatiblity problem, because `arrowFlightSqlPort` field, only metaVerserion
less than FeMetaVersion.VERSION_121 will call `BackendHbResponse.readField`
* Introduced by https://github.com/apache/doris/pull/24314
materialized view def is as following:
> select l_shipdate, o_orderdate, l_partkey, l_suppkey, o_orderkey
> from lineitem
> left join (select * from orders where o_orderdate = '2023-12-10' ) t2
> on lineitem.l_orderkey = t2.o_orderkey;
the query as following, should add filter `o_orderdate = '2023-12-10'` on mv when query rewrite by materialized view
> select l_shipdate, o_orderdate, l_partkey, l_suppkey, o_orderkey
> from lineitem
> left join orders
> on lineitem.l_orderkey = orders.o_orderkey
> where o_orderdate = '2023-12-10' order by 1, 2, 3, 4, 5;
