Issue Number: close #xxx
when cal array hash, elem size is not need to seed hash
hash = HashUtil::zlib_crc_hash(reinterpret_cast<const char*>(&elem_size),
sizeof(elem_size), hash);
but we need to be care [[], [1]] vs [[1], []], when array nested array , and nested array is empty, we should make hash seed to
make difference
2. use range for one hash value to avoid virtual function call in loop.
which double the performance. I make it in ut
column: array[int64]
50 rows , and single array has 10w elements
we do not Implement any hash functions in array/map/struct column , so we use sql like this will make be core
select * from (
select
bdp.nc_num,
collect_list(distinct(bd.catalog_name)) as catalog_name,
material_qty
from
dataease.bu_delivery_product bdp
left join dataease.bu_trans_transfer btt on bdp.delivery_product_id = btt.delivery_product_id
left join dataease.bu_delivery bd on bdp.delivery_id = bd.delivery_id
where
bd.val_status in ('10', '20', '30', '90')
and bd.delivery_type in (0, 1, 2)
group by
nc_num,
material_qty
union
ALL
select
bdp.nc_num,
collect_list(distinct(bd.catalog_name)) as catalog_name,
material_qty
from
dataease.bu_trans_transfer btt
left join dataease.bu_delivery_product bdp on bdp.delivery_product_id = btt.delivery_product_id
left join dataease.bu_delivery bd on bdp.delivery_id = bd.delivery_id
where
bd.val_status in ('10', '20', '30', '90')
and bd.delivery_type in (0, 1, 2)
group by
nc_num,
material_qty
) aa;
core :
Currently, there are some useless includes in the codebase. We can use a tool named include-what-you-use to optimize these includes. By using a strict include-what-you-use policy, we can get lots of benefits from it.
