Question

我试图返回所有使用特定枚举的表。到目前为止，我有这个：

select *
    from pg_type t 
       join pg_enum e on t.oid = e.enumtypid  
       join pg_catalog.pg_namespace n
          ON n.oid = t.typnamespace and t.typname = 'enum';

我该如何修改此查询以返回实际表，还是有其他更好的用法？

Answer 1

假设您要查找的类型是typschema.typname，最简单的查询就是：

SELECT t.relnamespace::regnamespace AS schema,
       t.relname AS tablename
FROM pg_catalog.pg_class AS t
   JOIN pg_catalog.pg_attribute AS c
      ON t.oid = c.attrelid
WHERE c.atttypid = 'typschema.typname'::regtype;

Answer 2

select * from information_schema.columns
where table_schema not in ('information_schema','pg_catalog')
and data_type='enum'

返回所有使用特定枚举的表

2 个答案: