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authorBruce Momjian2015-10-07 14:30:54 +0000
committerBruce Momjian2015-10-07 14:30:54 +0000
commitb292ee79a6bc8a1a6610181fcdc2c4092c82eaf2 (patch)
treeb11065cf3457f1065cbdfe04ae63fa5c243d3285
parent23d29cef93ea8d060ceae42146154e45c5a4f862 (diff)
docs: add JSONB containment example of a key and empty object
Backpatch through 9.5
-rw-r--r--doc/src/sgml/json.sgml5
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/src/sgml/json.sgml b/doc/src/sgml/json.sgml
index 47146b4c22..118fb35e25 100644
--- a/doc/src/sgml/json.sgml
+++ b/doc/src/sgml/json.sgml
@@ -280,7 +280,7 @@ 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:
@@ -291,6 +291,9 @@ SELECT '[1, 2, [1, 3]]'::jsonb @&gt; '[[1, 3]]'::jsonb;
-- Similarly, containment is not reported here:
SELECT '{"foo": {"bar": "baz"}}'::jsonb @&gt; '{"bar": "baz"}'::jsonb; -- yields false
+
+-- A top-level key and an empty object is contained:
+SELECT '{"foo": {"bar": "baz"}}'::jsonb @&gt; '{"foo": {}}'::jsonb;
</programlisting>
<para>