[HACKERS] Proposal: new function array_init

Hello

There was more time questions about array's initialisation. I propose
function array_init.

CREATE OR REPLACE FUNCTION array_init(sizes int[], v anyelement)
RETURNS anyarray;

First parameter is array of dimension's sizes. Second argument is
value that will be used for initialisation.

Because pg array's indexes must not start from 1 we can allow specify it.

CREATE OR REPLACE FUNCTION array_init(sizes int[], lowers int[], v
anyelement) RETURNS anyarray;

select array_init(array[2],0);
array
---------------
{0,0}
(1 row)

select array_init(array[1,2], 0);
array
---------------
{{0,0},{0,0}}
(1 row)

Any comments?

Regards
Pavel Stehule

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