Thank you -
On Tue, Mar 20, 2018 at 3:27 PM, Tom Lane wrote:
>
> I think you could push the conditionality into a plpgsql function,
> something like (untested)
>
> create function jsonb_elements_if_array(j jsonb) returns setof jsonb as $$
> begin
> if jsonb_typeof(j) = 'array' then
> return
Alexander Farber writes:
> I am trying to fetch a history/protocol of a game with:
> SELECT
> CASE WHEN JSONB_TYPEOF(tiles) = 'array' THEN
> JSONB_ARRAY_ELEMENTS(tiles) ELSE NULL END AS x
I think you could push the conditionality into a plpgsql function,
somet
ng this stored function gives the error:
>
> ERROR: 0A000: set-returning functions are not allowed in CASE
> LINE 18: ... CASE WHEN JSONB_TYPEOF(tiles) = 'array' THEN JSONB_ARRA...
> ^
> HINT: You might be ab
ASE
LINE 18: ... CASE WHEN JSONB_TYPEOF(tiles) = 'array' THEN JSONB_ARRA...
^
HINT: You might be able to move the set-returning function into a LATERAL
FROM item.
I have read that PostgreSQL 10 handles SRF more strictly, but what does it
want me to do here, to add 1 more table to the LEFT JOIN?
Thank you
Alex
