On 9/20/05, Matthew Peter <survivedsushi@xxxxxxxxx> wrote: > Wondering if there's a way for postgres to return how > many elements are in a array as a single integer? For > instance, returning 10 (items in array) instead of > [-5:4] > > Also, is there a way to return the position of an item > in a array? > Try using array_upper and specify which array dimension. from http://www.postgresql.org/docs/current/static/arrays.htm: "array_dims produces a text result, which is convenient for people to read but perhaps not so convenient for programs. Dimensions can also be retrieved with array_upper and array_lower, which return the upper and lower bound of a specified array dimension, respectively." pg8=# SELECT array_dims('{4,2,3,5,6}'::INT[]); array_dims ------------ [1:5] (1 row) pg8=# SELECT array_upper('{4,2,3,5,6}'::INT[],1); array_upper ------------- 5 ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
