问题描述
在项目中,将有超过1亿用户,我想按行和列(复合)对它进行分区,并在我们的行数超过500万(任何应用程序ID为5数百万的用户)。并每月自动创建一个分区表。
我出于这些目的使用了Postgresql
有什么比pgslice和pgparty更好的宝石
我尝试了很多宝石,但是它们都不适合我。
CREATE TABLE public.admins (
id int not null,name varchar,firstname varchar,app_id int not null,created_at date not null
) PARTITION BY RANGE(created_at);
CREATE INDEX ON admins(created_at);
这是表格的Postgres代码
CREATE OR REPLACE FUNCTION new_partition_creator() RETURNS trigger AS
$BODY$
DECLARE
partition_date TEXT;
partition TEXT;
partition_day int;
startdate date;
enddate date;
BEGIN
partition_day := to_char(NEW.logdate,'DD');
partition_date := to_char(NEW.logdate,'YYYY_MM');
IF partition_day < 15 THEN
partition := TG_RELNAME || '_' || partition_date || '_p1';
startdate := to_char(NEW.logdate,'YYYY-MM-01');
enddate := date_trunc('MONTH',NEW.logdate) + INTERVAL '1 MONTH - 1 day';
ELSE
partition := TG_RELNAME || '_' || partition_date || '_p2';
startdate := to_char(NEW.logdate,'YYYY-MM-15');
enddate := date_trunc('MONTH',NEW.logdate) + INTERVAL '1 MONTH - 1 day';
END IF;
IF NOT EXISTS(SELECT relname FROM pg_class WHERE relname=partition) THEN
RAISE NOTICE 'A partition has been created %',partition;
EXECUTE 'CREATE TABLE ' || partition || ' ( CHECK ( logdate >= DATE ''' || startdate || ''' AND logdate <= DATE ''' || enddate || ''' )) INHERITS (' || TG_RELNAME || ');';
EXECUTE 'CREATE INDEX ' || partition || '_logdate ON ' || partition || '(logdate)';
EXECUTE 'ALTER TABLE ' || partition || ' add primary key(city_id);';
END IF;
EXECUTE 'INSERT INTO ' || partition || ' SELECT(' || TG_RELNAME || ' ' || quote_literal(NEW) || ').* RETURNING city_id;';
RETURN NULL;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
这是postgres中的代码示例,但所有这些都方便我自动获得
解决方法
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