</para>
<programlisting>
-- Simple scalar/primitive values contain only the identical value:
-SELECT '"foo"'::jsonb @> '"foo"'::jsonb;
+SELECT '"foo"'::jsonb @> '"foo"'::jsonb;
-- The array on the right side is contained within the one on the left:
-SELECT '[1, 2, 3]'::jsonb @> '[1, 3]'::jsonb;
+SELECT '[1, 2, 3]'::jsonb @> '[1, 3]'::jsonb;
-- Order of array elements is not significant, so this is also true:
-SELECT '[1, 2, 3]'::jsonb @> '[3, 1]'::jsonb;
+SELECT '[1, 2, 3]'::jsonb @> '[3, 1]'::jsonb;
-- Duplicate array elements don't matter either:
-SELECT '[1, 2, 3]'::jsonb @> '[1, 2, 2]'::jsonb;
+SELECT '[1, 2, 3]'::jsonb @> '[1, 2, 2]'::jsonb;
-- The object with a single pair on the right side is contained
-- within the object on the left side:
-SELECT '{"product": "PostgreSQL", "version": 9.4, "jsonb":true}'::jsonb @> '{"version":9.4}'::jsonb;
+SELECT '{"product": "PostgreSQL", "version": 9.4, "jsonb":true}'::jsonb @> '{"version":9.4}'::jsonb;
-- The array on the right side is <emphasis>not</> considered contained within the
-- array on the left, even though a similar array is nested within it:
-SELECT '[1, 2, [1, 3]]'::jsonb @> '[1, 3]'::jsonb; -- yields false
+SELECT '[1, 2, [1, 3]]'::jsonb @> '[1, 3]'::jsonb; -- yields false
-- But with a layer of nesting, it is contained:
-SELECT '[1, 2, [1, 3]]'::jsonb @> '[[1, 3]]'::jsonb;
+SELECT '[1, 2, [1, 3]]'::jsonb @> '[[1, 3]]'::jsonb;
-- Similarly, containment is not reported here:
-SELECT '{"foo": {"bar": "baz"}}'::jsonb @> '{"bar": "baz"}'::jsonb; -- yields false
+SELECT '{"foo": {"bar": "baz"}}'::jsonb @> '{"bar": "baz"}'::jsonb; -- yields false
</programlisting>
<para>
</para>
<programlisting>
-- This array contains the primitive string value:
-SELECT '["foo", "bar"]'::jsonb @> '"bar"'::jsonb;
+SELECT '["foo", "bar"]'::jsonb @> '"bar"'::jsonb;
-- This exception is not reciprocal -- non-containment is reported here:
-SELECT '"bar"'::jsonb @> '["bar"]'::jsonb; -- yields false
+SELECT '"bar"'::jsonb @> '["bar"]'::jsonb; -- yields false
</programlisting>
<para>