PostgreSQL获取数据库中所有view名 视图

SELECT * FROM pg_views  
WHERE schemaname ='public'

postgreSQL获取数据库中所有table名 表

SELECT * FROM pg_tables  
WHERE tablename NOT LIKE 'pg%' AND tablename NOT LIKE 'sql_%'
ORDER BY tablename;

postgreSQL获取某个表tablename 所有字段名称 ， 类型，备注,是否为空

SELECT 
        col_description(a.attrelid,a.attnum) as comment,
		pg_type.typname as typename,
		a.attname as name, 
		a.attnotnull as notnull
FROM 
    pg_class as c,pg_attribute as a 
inner join pg_type on pg_type.oid = a.atttypid
where 
    c.relname = 'xxxx' and a.attrelid = c.oid and a.attnum>0

postgreSQL获取某个表tablename 的主键信息

select 
        pg_attribute.attname as colname,
		pg_type.typname as typename,
		pg_constraint.conname as pk_name 
from pg_constraint  
inner join pg_class on pg_constraint.conrelid = pg_class.oid 
inner join pg_attribute on pg_attribute.attrelid = pg_class.oid and  pg_attribute.attnum = pg_constraint.conkey[1]
inner join pg_type on pg_type.oid = pg_attribute.atttypid
where pg_class.relname = 'bd_basic_data_type' and pg_constraint.contype='p'