Re: getting column names

But if I join back to foo1 like below I get

select a.audit_id, a.table_name, b[1],b[2]
from
foo1 a,
(select
array(
select
column_name::text from
information_schema.columns
where
table_name=a.table_name
and
(
column_name like '%add_by%'
or
column_name like '%add_date%'
)) b) as foo
;

ERROR:  invalid reference to FROM-clause entry for table "a"
LINE 10: table_name=a.table_name
                    ^
HINT:  There is an entry for table "a", but it cannot be referenced from this part of the query.