From b292ee79a6bc8a1a6610181fcdc2c4092c82eaf2 Mon Sep 17 00:00:00 2001 From: Bruce Momjian Date: Wed, 7 Oct 2015 10:30:54 -0400 Subject: [PATCH] docs: add JSONB containment example of a key and empty object Backpatch through 9.5 --- doc/src/sgml/json.sgml | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) 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 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;