On 2024-06-05 19:50 +0200, Marcos Pegoraro wrote: > There are some functions called ...length, but only array_length returns > NULL on empty array, why ? Because the empty array has zero dimensions[1]. But now I'm wondering why array_ndims returns NULL instead of zero for empty arrays. [1] https://www.postgresql.org/message-id/603c8f070811061951u16034c3fk5dfaa493a6739a24%40mail.gmail.com -- Erik