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Fix JSON_OBJECTAGG uniquefying bug

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Commit f4fb45d15c contained a bug in removing items with null values when
unique keys are required, where the leading items that are sorted
contained such values. Fix that and add a test for it.

Discussion: https://postgr.es/m/CAJA4AWQ_XbSmsNbW226UqNyRLJ+wb=iQkQMj77cQyoNkqtf=2Q@mail.gmail.com
This commit is contained in:
Andrew Dunstan
2022-04-28 15:28:20 -04:00
parent 5c854e7a2c
commit 9c3d25e178
3 changed files with 22 additions and 2 deletions
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3
src/test/regress/sql/sqljson.sql
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@ -281,6 +281,9 @@ FROM (VALUES (1, 1), (1, NULL), (2, 2)) foo(k, v);
SELECT JSON_OBJECTAGG(k: v ABSENT ON NULL WITH UNIQUE KEYS RETURNING jsonb)
FROM (VALUES (1, 1), (1, NULL), (2, 2)) foo(k, v);
SELECT JSON_OBJECTAGG(k: v ABSENT ON NULL WITH UNIQUE KEYS RETURNING jsonb)
FROM (VALUES (1, 1), (0, NULL),(4, null), (5, null),(6, null),(2, 2)) foo(k, v);
-- Test JSON_OBJECT deparsing
EXPLAIN (VERBOSE, COSTS OFF)
SELECT JSON_OBJECT('foo' : '1' FORMAT JSON, 'bar' : 'baz' RETURNING json);