You've already forked mariadb-columnstore-engine
mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-11-25 20:23:16 +03:00
27 lines
782 B
Plaintext
27 lines
782 B
Plaintext
USE tpch1;
|
|
drop table if exists month;
|
|
Warnings:
|
|
Note 1051 Unknown table 'tpch1.month'
|
|
create table month(id int, month varchar(20), season varchar(6))engine=columnstore;
|
|
insert into month values (1, 'Jan', 'Winter');
|
|
SELECT *,
|
|
@r AS `FIRST_VALUE(month) OVER (PARTITION BY season ORDER BY id)`
|
|
FROM (
|
|
SELECT m.*
|
|
FROM (
|
|
SELECT @_season = NULL
|
|
) vars,
|
|
month m
|
|
ORDER BY
|
|
season, id
|
|
) mo
|
|
WHERE (CASE WHEN @_season IS NULL OR @_season <> season THEN @r := month ELSE
|
|
month END IS NOT NULL)
|
|
AND (@_season := season) IS NOT NULL;
|
|
id month season FIRST_VALUE(month) OVER (PARTITION BY season ORDER BY id)
|
|
1 Jan Winter NULL
|
|
SELECT * FROM ( SELECT m.* FROM
|
|
( SELECT @_season is NULL a) vars, month m where a=m.id ORDER BY season, id ) mo;
|
|
id month season
|
|
drop table month;
|