Postgresql获得表字段结构信息包含注释

Select * From (
　　Select
　　　　a.relname FTableName,
　　　　b.attname FFieldName,
　　　　format_type(b.atttypid,b.atttypmod) as FFieldType,
　　　　col_description(b.attrelid,b.attnum) FFieldDesc,
　　　　b.attnum FNo,
　　　　b.attnotnull FNotNull
　　from
　　　　(select oid, * from pg_class where relnamespace=2200 and reltype>0) a
　　left join
　　　　(select * From pg_catalog.pg_attribute where attnum>0 and atttypid>0 ) b
　　on a.oid=b.attrelid
) A
Order by ftablename,fno