de requête Char variant postgres

Question

J'ai essayé de faire la requête suivante fonctionne, mais je ne pouvais pas:

SELECT "users".* FROM "users" WHERE (users.roles LIKE "%sales%") 
or 
    SELECT "users".* FROM "users" WHERE (users.roles LIKE '%sales%') 

où les rôles, peuvent contenir:

{operations,business_development,sales,customer_service,manager} 

et des rôles est: character varying[]

Je reçois l'erreur:

ERROR: operator does not exist: character varying[] ~~ unknown LINE 1: select users.id from users where users.roles LIKE '%sales%'...

Answer 1

Essayez

SELECT "users".* FROM "users" WHERE 'sales' = ANY(users.roles) 

Ceci étant dit, il est intéressant de noter:

Tip: Arrays are not sets; searching for specific array elements can be a sign of database misdesign. Consider using a separate table with a row for each item that would be an array element. This will be easier to search, and is likely to scale better for a large number of elements.

http://www.postgresql.org/docs/9.5/static/arrays.html