In an array constant with psql - sql

Question

Here is my psql query :
WITH myconstants (nb_pieces,nb_room,is_fiber,codes_insee) as (
values (0,0,false,('95018','75018'))
)
SELECT
*
FROM
on_plan_buy pbuy
INNER JOIN
card_fiche fiche
ON pbuy.uuid = fiche.ad_uuid
INNER JOIN
myconstants const
ON true
WHERE pbuy.code_insee IN ('95018','75018')
AND pbuy.price <= 99999999 AND pbuy.price >= 0
AND CASE WHEN const.nb_pieces = 0 THEN pbuy.piece > 0 ELSE pbuy.piece = const.nb_pieces END
AND CASE WHEN const.nb_room = 0 THEN pbuy.chambre > 0 ELSE pbuy.chambre = const.nb_room END
AND CASE WHEN const.is_fiber = false THEN true ELSE fiche.fiber = true END
LIMIT 100;
It works fine.
But i would like to use my constant:
WITH myconstants (nb_pieces,nb_room,is_fiber,codes_insee) as (
values (0,0,false,('95018','75018'))
)
SELECT
*
FROM
on_plan_buy pbuy
INNER JOIN
card_fiche fiche
ON pbuy.uuid = fiche.ad_uuid
INNER JOIN
myconstants const
ON true
WHERE pbuy.code_insee IN const.codes_insee
AND pbuy.price <= 99999999 AND pbuy.price >= 0
AND CASE WHEN const.nb_pieces = 0 THEN pbuy.piece > 0 ELSE pbuy.piece = const.nb_pieces END
AND CASE WHEN const.nb_room = 0 THEN pbuy.chambre > 0 ELSE pbuy.chambre = const.nb_room END
AND CASE WHEN const.is_fiber = false THEN true ELSE fiche.fiber = true END
LIMIT 100;
And now it doesn't works.
Any idea how to use correctly the const.codes_insee ?
Regards

Answer 1

You have created a record with ('95018','75018') for codes_insee where you would like to specify a set of values to search using the IN operator. However this operator does not work with this type. Instead, you can change the data type to an array, allowing you to add more filters in the future if you desire, and use the array functions. I've used array_position to determine if the value is in the array. See below
WITH myconstants (nb_pieces,nb_room,is_fiber,codes_insee) as (
values (0,0,false,string_to_array('95018,75018',','))
)
SELECT
*
FROM
on_plan_buy pbuy
INNER JOIN
card_fiche fiche
ON pbuy.uuid = fiche.ad_uuid
INNER JOIN
myconstants const
ON true
WHERE
array_position(const.codes_insee,cast(pbuy.code_insee as text)) > -1
AND pbuy.price <= 99999999 AND pbuy.price >= 0
AND CASE WHEN const.nb_pieces = 0 THEN pbuy.piece > 0 ELSE pbuy.piece = const.nb_pieces END
AND CASE WHEN const.nb_room = 0 THEN pbuy.chambre > 0 ELSE pbuy.chambre = const.nb_room END
AND CASE WHEN const.is_fiber = false THEN true ELSE fiche.fiber = true END
LIMIT 100;
Reference
Postgresql Array Functions

Answer 2

Instead of IN please try exists:
WITH myconstants (nb_pieces,nb_room,is_fiber,codes_insee) as (
values (0,0,false,('95018','75018'))
)
SELECT
*
FROM
on_plan_buy pbuy
INNER JOIN
card_fiche fiche
ON pbuy.uuid = fiche.ad_uuid
INNER JOIN
myconstants const
ON true
WHERE
pbuy.price <= 99999999 AND pbuy.price >= 0
AND CASE WHEN const.nb_pieces = 0 THEN pbuy.piece > 0 ELSE pbuy.piece = const.nb_pieces END
AND CASE WHEN const.nb_room = 0 THEN pbuy.chambre > 0 ELSE pbuy.chambre = const.nb_room END
AND CASE WHEN const.is_fiber = false THEN true ELSE fiche.fiber = true END
and exists
(
select 1 from myconstants where pbuy.code_insee = myconstants.codes_insee
)
LIMIT 100;