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author | Bruce Momjian | 2015-10-07 14:30:54 +0000 |
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committer | Bruce Momjian | 2015-10-07 14:30:54 +0000 |
commit | b292ee79a6bc8a1a6610181fcdc2c4092c82eaf2 (patch) | |
tree | b11065cf3457f1065cbdfe04ae63fa5c243d3285 | |
parent | 23d29cef93ea8d060ceae42146154e45c5a4f862 (diff) |
docs: add JSONB containment example of a key and empty object
Backpatch through 9.5
-rw-r--r-- | doc/src/sgml/json.sgml | 5 |
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 @> '[[1, 3]]'::jsonb; -- Similarly, containment is not reported here: SELECT '{"foo": {"bar": "baz"}}'::jsonb @> '{"bar": "baz"}'::jsonb; -- yields false + +-- A top-level key and an empty object is contained: +SELECT '{"foo": {"bar": "baz"}}'::jsonb @> '{"foo": {}}'::jsonb; </programlisting> <para> |