【PG】常见数据库、表属性设置

数据库复制、备份相关

表的复制标识

单表操作

通过ALTER语句单独更改一张表的复制标识。

ALTER TABLE [tablename] REPLICA IDENTITY FULL;

批量表操作

通过代码块的方式，对某个schema中的所有表一起更新其复制标识。

SELECT 
    tablename, 
    CASE relreplident
		WHEN 'd' THEN 'default'
		WHEN 'n' THEN 'nothing'
		WHEN 'f' THEN 'full'
		WHEN 'i' THEN 'index'
    END AS replica_identity
FROM 
    pg_tables 
JOIN 
    pg_class ON pg_tables.tablename = pg_class.relname
LEFT JOIN 
    pg_index ON pg_class.oid = pg_index.indrelid AND indisprimary
WHERE 
    schemaname = 'public'; -- 替换为您实际的模式名称，默认为public

DO $$
DECLARE
    row record;
BEGIN
    FOR row IN SELECT tablename FROM pg_tables JOIN pg_class ON pg_tables.tablename = pg_class.relname LEFT JOIN pg_index ON pg_class.oid = pg_index.indrelid AND indisprimary WHERE schemaname = 'public' LOOP
        EXECUTE format('ALTER TABLE %I REPLICA IDENTITY FULL;', row.tablename);
        RAISE NOTICE 'Table % has been altered to have FULL replica identity.', row.tablename;
    END LOOP;
END $$;

链接

【1】REPLICA IDENTITY