I need to find out which tables, and columns in that table, reference a
given table.
I would like to use the information_schema views, but am stuck at 7.3.X
right now.
Here is what I came up with so far
SELECT pcl.relname AS thistable,
pcl1.relname AS referencesthistable
FROM ((pg_constraint pc JOIN pg_class pcl
ON ((pc.conrelid = pcl.oid)))
JOIN pg_class pcl1 ON ((pc.confrelid = pcl1.oid)));
which is fine as far as it goes. What is not readily apparent is how to
get the column names. I see there are conkey and confkey in
pg_constraint, which seem to be arrays of integers that might just
relate to attnum in pg_attribute.
Is there already a view/function that will get me this info, and if not,
am I barking up the right tree here? I seldom tinker in system tables,
because I am too lazy to learn them, and because it seems to be bad
form. They are none of my business, really.
Looking forward to the information_schema crutch!
Ian
