使用默认的sql表来查找表中存在的列

Question

我有一个postgresql数据库设置与模式分割的客户端数据。

在SQL中我想找出其中存在

我试图使用PG _...表，以确定这些列包含字符串“ID”列的表的产品，但出现下面的查询要带回从整个模式的结果，尽管限制在TABLE_SCHEMA

SELECT * 
FROM pg_class c 
    INNER JOIN pg_attribute a ON a.attrelid = c.oid 
    INNER JOIN pg_type t ON a.atttypid = t.oid 
    INNER JOIN information_schema.tables sch ON c.relname = sch.table_name 
WHERE c.relname = 'products' 
AND a.attnum > 0 
AND a.attname LIKE '%id%' 
AND table_schema = 'schema001' 

我猜的模式可能设置不正确或where子句是不正确 - 任何帮助，将不胜感激

Answer 1

使用pg_namespace和降information_schema：

SELECT nspname, relname, attname 
FROM pg_class c 
    INNER JOIN pg_namespace n ON n.oid = c.relnamespace 
    INNER JOIN pg_attribute a ON a.attrelid = c.oid 
    INNER JOIN pg_type t ON a.atttypid = t.oid 
WHERE c.relname = 'products' 
AND a.attnum > 0 
AND a.attname LIKE '%id%' 
AND n.nspname = 'schema001';