/查询模式下所有表
SELECT a.attnum,
c.relname AS tablename,
a.attname AS field,
t.typname AS type,
a.attlen AS length,
a.atttypmod AS lengthvar,
a.attnotnull AS notnull,
b.description AS comment
FROM sys_class c,
sys_attribute a
LEFT OUTER JOIN sys_description b ON a.attrelid=b.objoid AND a.attnum = b.objsubid,
sys_type t,sys_tables s
WHERE s.schemaname ='PUBLIC'
AND c.relname = s.tablename
and a.attnum > 0
and a.attrelid = c.oid
and a.atttypid = t.oid
ORDER BY c.relname,a.attnum;
//查询单表
SELECT a.attnum,
a.attname AS field,
t.typname AS type,
a.attlen AS length,
a.atttypmod AS lengthvar,
a.attnotnull AS notnull,
b.description AS comment
FROM sys_class c,
sys_attribute a
LEFT OUTER JOIN sys_description b ON a.attrelid=b.objoid AND a.attnum = b.objsubid,
sys_type t
WHERE c.relname = 'TEST12'
and a.attnum > 0
and a.attrelid = c.oid
and a.atttypid = t.oid
ORDER BY a.attnum；
