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create or replace function loop_function(input int[]) returns int[] language plpgsql as $$ declare val int; tot int = 0; res int[]; begin foreach val in array input loop if val = 0 then tot = 0; else tot := tot + val; end if; res := res || tot; end loop; return res; end $$; select loop_function('{0,1,1,1,1,0,-1,-1,-1,0}')
loop_function
{0,1,2,3,4,0,-1,-2,-3,0}