欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

GreenPlum之日常SQL脚本笔记

程序员文章站 2022-12-10 15:36:43
--1.指定月份总共多少天 SELECT EXTRACT(DAY FROM CAST('2017-08-01' AS DATE) + INTERVAL...

--1.指定月份总共多少天

SELECT EXTRACT(DAY FROM CAST('2017-08-01' AS DATE) + INTERVAL '1 month' - INTERVAL '1 day')

SELECT EXTRACT(DAY FROM CAST(TO_CHAR(NOW(),'YYYY-MM')||'-01' AS DATE) + INTERVAL '1 month' - INTERVAL '1 day')

--2.修改默认搜索(search_path)路径

SHOW search_path;
SET search_path TO your_schema_name;

--3.更改schema所有者

ALTER SCHEMA your_schema_name OWNER TO other_user;

--4.修改表的所有者

ALTER TABLE your_table_name OWNER TO other_user;

--5.授予指定用户查询或所有权限

GRANT SELECT ON TABLE your_table_name TO other_user;
GRANT ALL ON TABLE your_table_name TO other_user;

--6.授予指定用户schema使用权限

GRANT USAGE ON SCHEMA your_schema_name TO other_user;

--7.回收指定用户schema使用权限

REVOKE ALL ON SCHEMA your_schema_name FROM other_user;
--不同对象授权关键字
TABLES,VIEWS,SEQUENCES: SELECT INSERT UPDATE DELETE RULE ALL
EXTERNAL TABLES: SELECT RULE ALL
DATABASES: CONNECT CREATE TEMPORARY|TEMP ALL
FUNCTIONS: EXECUTE
PROCEDURAL LANGUAGES: USAGE
SCHEMAS: CREATE USAGE ALL
--8.批量授予函数执行权限
SELECT 'GRANT EXECUTE ON FUNCTION '||routines.routine_name||'('||STRING_AGG(parameters.data_type,',' ORDER BY parameters.ordinal_position)||') TO other_user;' batchgrant
FROM information_schema.routines
JOIN information_schema.parameters ON routines.specific_name=parameters.specific_name
WHERE routines.specific_schema='product'
GROUP BY routines.routine_name