How to make a select with array contains value clause in psql

问题

I have column arr which is of type array.

I need to get rows, where arr column contains value s

This query:

SELECT * FROM table WHERE arr @> ARRAY[\'s\']

gives the error:

ERROR: operator does not exist: character varying[] @> text[]

Why does it not work?

p.s. I know about any() operator, but why doesn\'t @> work?

回答1:

Try

SELECT * FROM table WHERE arr @> ARRAY['s']::varchar[]

回答2:

Note that this may also work:

SELECT * FROM table WHERE s=ANY(array)

回答3:

SELECT * FROM table WHERE arr && '{s}'::text[];

Compare two arrays for containment.

来源：https://stackoverflow.com/questions/16606357/how-to-make-a-select-with-array-contains-value-clause-in-psql