-----Original Message----- From: pgsql-general-owner@xxxxxxxxxxxxxx [mailto:pgsql-general-owner@xxxxxxxxxxxxxx] On Behalf Of Ondrej Ivanic Sent: Friday, September 16, 2011 12:54 AM To: pgsql-general@xxxxxxxxxxxxxx general Subject: different unnest function Hi, I need function which unnest array in a different way. Input table has ineger[][] column: col1 ---------- {{1,2,3,4}, {5,6,7,8}, {9, 10, 11, 12}} {{11,12,13,14}, {15,16,17,18}, {19, 110, 111, 112}} ... and output should be: select unnest2(col1) from T unnest2 ----------------- {1,2,3,4} {5,6,7,8} {9, 10, 11, 12} {11,12,13,14} {15,16,17,18} {19, 110, 111, 112} My function is: create or replace function unnest2(anyarray) returns setof anyarray AS $BODY$ select $1[i:i] from generate_series(array_lower($1,1), array_upper($1,1)) i; $BODY$ language 'sql'; and the result is: {{1,2,3,4}} {{5,6,7,8}} {{9, 10, 11, 12}} {{11,12,13,14}} {{15,16,17,18}} {{19, 110, 111, 112}} which is almost what I need...(or I'm at the beginning :)) Any ideas? ---------------------------------------------------------------------------- Untested by try something like: SELECT ($1[i:i])[1] FROM generate_series(...) i; Basically you want to take the first (and only) array element from your slice. You might need to use sub-queries to get the syntax to work but the idea should be possible. David J. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
