mirror of
https://github.com/aljazceru/turso.git
synced 2025-12-25 20:14:21 +01:00
c4548b51f1
```sql
-- This PR does effectively this transformation:
select
sum(l_extendedprice* (1 - l_discount)) as revenue
from
lineitem,
part
where
(
p_partkey = l_partkey
and p_brand = 'Brand#22'
and p_container in ('SM CASE', 'SM BOX', 'SM PACK', 'SM PKG')
and l_quantity >= 8 and l_quantity <= 8 + 10
and p_size between 1 and 5
and l_shipmode in ('AIR', 'AIR REG')
and l_shipinstruct = 'DELIVER IN PERSON'
)
or
(
p_partkey = l_partkey
and p_brand = 'Brand#23'
and p_container in ('MED BAG', 'MED BOX', 'MED PKG', 'MED PACK')
and l_quantity >= 10 and l_quantity <= 10 + 10
and p_size between 1 and 10
and l_shipmode in ('AIR', 'AIR REG')
and l_shipinstruct = 'DELIVER IN PERSON'
)
or
(
p_partkey = l_partkey
and p_brand = 'Brand#12'
and p_container in ('LG CASE', 'LG BOX', 'LG PACK', 'LG PKG')
and l_quantity >= 24 and l_quantity <= 24 + 10
and p_size between 1 and 15
and l_shipmode in ('AIR', 'AIR REG')
and l_shipinstruct = 'DELIVER IN PERSON'
);
-- Same query with common conjuncts (ANDs) extracted:
select
sum(l_extendedprice* (1 - l_discount)) as revenue
from
lineitem,
part
where
p_partkey = l_partkey
and l_shipmode in ('AIR', 'AIR REG')
and l_shipinstruct = 'DELIVER IN PERSON'
and (
(
p_brand = 'Brand#22'
and p_container in ('SM CASE', 'SM BOX', 'SM PACK', 'SM PKG')
and l_quantity >= 8 and l_quantity <= 8 + 10
and p_size between 1 and 5
)
or
(
p_brand = 'Brand#23'
and p_container in ('MED BAG', 'MED BOX', 'MED PKG', 'MED PACK')
and l_quantity >= 10 and l_quantity <= 10 + 10
and p_size between 1 and 10
)
or
(
p_brand = 'Brand#12'
and p_container in ('LG CASE', 'LG BOX', 'LG PACK', 'LG PKG')
and l_quantity >= 24 and l_quantity <= 24 + 10
and p_size between 1 and 15
)
);
```
This allows Limbo's optimizer to 1. recognize `p_partkey=l_partkey` as
an index constraint on `part`, and 2. filter out `lineitem` rows before
joining. With this optimization, Limbo completes TPC-H `19.sql` nearly
as fast as SQLite on my machine. Without it, Limbo takes forever.
This branch: `939ms`
Main: `uh, i started running it a few minutes ago and it hasnt finished,
and i dont feel like waiting i guess`
Reviewed-by: Pere Diaz Bou <pere-altea@homail.com>
Closes #1520