--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 
