projections.sql

create extension vops;

create table lineitem(
   l_orderkey integer,
   l_partkey integer,
   l_suppkey integer,
   l_linenumber integer,
   l_quantity real,
   l_extendedprice real,
   l_discount real,
   l_tax real,
   l_returnflag "char",
   l_linestatus "char",
   l_shipdate date,
   l_commitdate date,
   l_receiptdate date,
   l_shipinstruct char(25),
   l_shipmode char(10),
   l_comment char(44),
   l_dummy char(1));

select create_projection('vops_lineitem','lineitem',array['l_shipdate','l_quantity','l_extendedprice','l_discount','l_tax'],array['l_returnflag','l_linestatus']);

\timing

copy lineitem from '/mnt/data/lineitem.tbl' delimiter '|' csv;

select vops_lineitem_refresh();

select
    l_returnflag,
    l_linestatus,
    sum(l_quantity) as sum_qty,
    sum(l_extendedprice) as sum_base_price,
    sum(l_extendedprice*(1-l_discount)) as sum_disc_price,
    sum(l_extendedprice*(1-l_discount)*(1+l_tax)) as sum_charge,
    avg(l_quantity) as avg_qty,
    avg(l_extendedprice) as avg_price,
    avg(l_discount) as avg_disc,
    count(*) as count_order
from
    lineitem
where
    l_shipdate <= '1998-12-01'
group by
    l_returnflag,
    l_linestatus
order by
    l_returnflag,
    l_linestatus;

set vops.auto_substitute_projections TO  on;

select
    l_returnflag,
    l_linestatus,
    sum(l_quantity) as sum_qty,
    sum(l_extendedprice) as sum_base_price,
    sum(l_extendedprice*(1-l_discount)) as sum_disc_price,
    sum(l_extendedprice*(1-l_discount)*(1+l_tax)) as sum_charge,
    avg(l_quantity) as avg_qty,
    avg(l_extendedprice) as avg_price,
    avg(l_discount) as avg_disc,
    count(*) as count_order
from
    lineitem
where
    l_shipdate <= '1998-12-01'
group by
    l_returnflag,
    l_linestatus
order by
    l_returnflag,
    l_linestatus;