Question

How to get the position of a column in the index in PostgreSQL database? indkey in pg_index catalog table gives the position of that column in it’s table, but i want the position of the column in it’s containing index.

Answer 1

Here’s one way. It might not be the best way.

SELECT c.relname, a.attname, a.attnum 
FROM pg_attribute a
INNER JOIN pg_class c on c.oid = a.attrelid 
WHERE c.relkind = 'i'
  AND c.relname = 'beds_pkey'
  AND a.attnum > 0

where beds_pkey is the name of the index.