Is there a way to remove a value from an array in pgSQL? Or to be more precise, to pop the last value? Judging by this list the answer seems to be no. I can get the result I want with an additional index pointer, but it's a bit cumbersome.
10 Answers
No, I don't think you can. At least not without writing something ugly like:
SELECT ARRAY (
SELECT UNNEST(yourarray) LIMIT (
SELECT array_upper(yourarray, 1) - 1
)
)
I'm not sure about your context, but this should give you something to work with:
CREATE TABLE test (x INT[]);
INSERT INTO test VALUES ('{1,2,3,4,5}');
SELECT x AS array_pre_pop,
x[array_lower(x,1) : array_upper(x,1)-1] AS array_post_pop,
x[array_upper(x,1)] AS popped_value
FROM test;
array_pre_pop | array_post_pop | popped_value
---------------+----------------+--------------
{1,2,3,4,5} | {1,2,3,4} | 5
Related