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6ee30209a6
This patch introduces the SQL standard IS JSON predicate. It operates on text and bytea values representing JSON, as well as on the json and jsonb types. Each test has IS and IS NOT variants and supports a WITH UNIQUE KEYS flag. The tests are: IS JSON [VALUE] IS JSON ARRAY IS JSON OBJECT IS JSON SCALAR These should be self-explanatory. The WITH UNIQUE KEYS flag makes these return false when duplicate keys exist in any object within the value, not necessarily directly contained in the outermost object. Author: Nikita Glukhov <n.gluhov@postgrespro.ru> Author: Teodor Sigaev <teodor@sigaev.ru> Author: Oleg Bartunov <obartunov@gmail.com> Author: Alexander Korotkov <aekorotkov@gmail.com> Author: Amit Langote <amitlangote09@gmail.com> Author: Andrew Dunstan <andrew@dunslane.net> Reviewers have included (in no particular order) Andres Freund, Alexander Korotkov, Pavel Stehule, Andrew Alsup, Erik Rijkers, Zihong Yu, Himanshu Upadhyaya, Daniel Gustafsson, Justin Pryzby. Discussion: https://postgr.es/m/CAF4Au4w2x-5LTnN_bxky-mq4=WOqsGsxSpENCzHRAzSnEd8+WQ@mail.gmail.com Discussion: https://postgr.es/m/cd0bb935-0158-78a7-08b5-904886deac4b@postgrespro.ru Discussion: https://postgr.es/m/20220616233130.rparivafipt6doj3@alap3.anarazel.de Discussion: https://postgr.es/m/abd9b83b-aa66-f230-3d6d-734817f0995d%40postgresql.org
381 lines
13 KiB
SQL
381 lines
13 KiB
SQL
-- JSON_OBJECT()
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SELECT JSON_OBJECT();
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SELECT JSON_OBJECT(RETURNING json);
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SELECT JSON_OBJECT(RETURNING json FORMAT JSON);
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SELECT JSON_OBJECT(RETURNING jsonb);
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SELECT JSON_OBJECT(RETURNING jsonb FORMAT JSON);
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SELECT JSON_OBJECT(RETURNING text);
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SELECT JSON_OBJECT(RETURNING text FORMAT JSON);
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SELECT JSON_OBJECT(RETURNING text FORMAT JSON ENCODING UTF8);
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SELECT JSON_OBJECT(RETURNING text FORMAT JSON ENCODING INVALID_ENCODING);
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SELECT JSON_OBJECT(RETURNING bytea);
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SELECT JSON_OBJECT(RETURNING bytea FORMAT JSON);
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SELECT JSON_OBJECT(RETURNING bytea FORMAT JSON ENCODING UTF8);
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SELECT JSON_OBJECT(RETURNING bytea FORMAT JSON ENCODING UTF16);
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SELECT JSON_OBJECT(RETURNING bytea FORMAT JSON ENCODING UTF32);
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SELECT JSON_OBJECT('foo': NULL::int FORMAT JSON);
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SELECT JSON_OBJECT('foo': NULL::int FORMAT JSON ENCODING UTF8);
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SELECT JSON_OBJECT('foo': NULL::json FORMAT JSON);
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SELECT JSON_OBJECT('foo': NULL::json FORMAT JSON ENCODING UTF8);
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SELECT JSON_OBJECT('foo': NULL::jsonb FORMAT JSON);
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SELECT JSON_OBJECT('foo': NULL::jsonb FORMAT JSON ENCODING UTF8);
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SELECT JSON_OBJECT(NULL: 1);
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SELECT JSON_OBJECT('a': 2 + 3);
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SELECT JSON_OBJECT('a' VALUE 2 + 3);
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--SELECT JSON_OBJECT(KEY 'a' VALUE 2 + 3);
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SELECT JSON_OBJECT('a' || 2: 1);
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SELECT JSON_OBJECT(('a' || 2) VALUE 1);
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--SELECT JSON_OBJECT('a' || 2 VALUE 1);
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--SELECT JSON_OBJECT(KEY 'a' || 2 VALUE 1);
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SELECT JSON_OBJECT('a': 2::text);
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SELECT JSON_OBJECT('a' VALUE 2::text);
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--SELECT JSON_OBJECT(KEY 'a' VALUE 2::text);
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SELECT JSON_OBJECT(1::text: 2);
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SELECT JSON_OBJECT((1::text) VALUE 2);
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--SELECT JSON_OBJECT(1::text VALUE 2);
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--SELECT JSON_OBJECT(KEY 1::text VALUE 2);
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SELECT JSON_OBJECT(json '[1]': 123);
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SELECT JSON_OBJECT(ARRAY[1,2,3]: 'aaa');
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SELECT JSON_OBJECT(
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'a': '123',
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1.23: 123,
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'c': json '[ 1,true,{ } ]',
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'd': jsonb '{ "x" : 123.45 }'
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);
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SELECT JSON_OBJECT(
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'a': '123',
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1.23: 123,
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'c': json '[ 1,true,{ } ]',
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'd': jsonb '{ "x" : 123.45 }'
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RETURNING jsonb
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);
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/*
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SELECT JSON_OBJECT(
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'a': '123',
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KEY 1.23 VALUE 123,
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'c' VALUE json '[1, true, {}]'
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);
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*/
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SELECT JSON_OBJECT('a': '123', 'b': JSON_OBJECT('a': 111, 'b': 'aaa'));
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SELECT JSON_OBJECT('a': '123', 'b': JSON_OBJECT('a': 111, 'b': 'aaa' RETURNING jsonb));
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SELECT JSON_OBJECT('a': JSON_OBJECT('b': 1 RETURNING text));
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SELECT JSON_OBJECT('a': JSON_OBJECT('b': 1 RETURNING text) FORMAT JSON);
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SELECT JSON_OBJECT('a': JSON_OBJECT('b': 1 RETURNING bytea));
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SELECT JSON_OBJECT('a': JSON_OBJECT('b': 1 RETURNING bytea) FORMAT JSON);
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SELECT JSON_OBJECT('a': '1', 'b': NULL, 'c': 2);
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SELECT JSON_OBJECT('a': '1', 'b': NULL, 'c': 2 NULL ON NULL);
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SELECT JSON_OBJECT('a': '1', 'b': NULL, 'c': 2 ABSENT ON NULL);
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SELECT JSON_OBJECT(1: 1, '1': NULL WITH UNIQUE);
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SELECT JSON_OBJECT(1: 1, '1': NULL ABSENT ON NULL WITH UNIQUE);
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SELECT JSON_OBJECT(1: 1, '1': NULL NULL ON NULL WITH UNIQUE RETURNING jsonb);
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SELECT JSON_OBJECT(1: 1, '1': NULL ABSENT ON NULL WITH UNIQUE RETURNING jsonb);
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SELECT JSON_OBJECT(1: 1, '2': NULL, '1': 1 NULL ON NULL WITH UNIQUE);
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SELECT JSON_OBJECT(1: 1, '2': NULL, '1': 1 ABSENT ON NULL WITH UNIQUE);
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SELECT JSON_OBJECT(1: 1, '2': NULL, '1': 1 ABSENT ON NULL WITHOUT UNIQUE);
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SELECT JSON_OBJECT(1: 1, '2': NULL, '1': 1 ABSENT ON NULL WITH UNIQUE RETURNING jsonb);
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SELECT JSON_OBJECT(1: 1, '2': NULL, '1': 1 ABSENT ON NULL WITHOUT UNIQUE RETURNING jsonb);
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SELECT JSON_OBJECT(1: 1, '2': NULL, '3': 1, 4: NULL, '5': 'a' ABSENT ON NULL WITH UNIQUE RETURNING jsonb);
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-- JSON_ARRAY()
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SELECT JSON_ARRAY();
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SELECT JSON_ARRAY(RETURNING json);
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SELECT JSON_ARRAY(RETURNING json FORMAT JSON);
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SELECT JSON_ARRAY(RETURNING jsonb);
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SELECT JSON_ARRAY(RETURNING jsonb FORMAT JSON);
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SELECT JSON_ARRAY(RETURNING text);
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SELECT JSON_ARRAY(RETURNING text FORMAT JSON);
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SELECT JSON_ARRAY(RETURNING text FORMAT JSON ENCODING UTF8);
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SELECT JSON_ARRAY(RETURNING text FORMAT JSON ENCODING INVALID_ENCODING);
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SELECT JSON_ARRAY(RETURNING bytea);
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SELECT JSON_ARRAY(RETURNING bytea FORMAT JSON);
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SELECT JSON_ARRAY(RETURNING bytea FORMAT JSON ENCODING UTF8);
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SELECT JSON_ARRAY(RETURNING bytea FORMAT JSON ENCODING UTF16);
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SELECT JSON_ARRAY(RETURNING bytea FORMAT JSON ENCODING UTF32);
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SELECT JSON_ARRAY('aaa', 111, true, array[1,2,3], NULL, json '{"a": [1]}', jsonb '["a",3]');
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SELECT JSON_ARRAY('a', NULL, 'b' NULL ON NULL);
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SELECT JSON_ARRAY('a', NULL, 'b' ABSENT ON NULL);
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SELECT JSON_ARRAY(NULL, NULL, 'b' ABSENT ON NULL);
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SELECT JSON_ARRAY('a', NULL, 'b' NULL ON NULL RETURNING jsonb);
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SELECT JSON_ARRAY('a', NULL, 'b' ABSENT ON NULL RETURNING jsonb);
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SELECT JSON_ARRAY(NULL, NULL, 'b' ABSENT ON NULL RETURNING jsonb);
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SELECT JSON_ARRAY(JSON_ARRAY('{ "a" : 123 }' RETURNING text));
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SELECT JSON_ARRAY(JSON_ARRAY('{ "a" : 123 }' FORMAT JSON RETURNING text));
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SELECT JSON_ARRAY(JSON_ARRAY('{ "a" : 123 }' FORMAT JSON RETURNING text) FORMAT JSON);
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SELECT JSON_ARRAY(SELECT i FROM (VALUES (1), (2), (NULL), (4)) foo(i));
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SELECT JSON_ARRAY(SELECT i FROM (VALUES (NULL::int[]), ('{1,2}'), (NULL), (NULL), ('{3,4}'), (NULL)) foo(i));
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SELECT JSON_ARRAY(SELECT i FROM (VALUES (NULL::int[]), ('{1,2}'), (NULL), (NULL), ('{3,4}'), (NULL)) foo(i) RETURNING jsonb);
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--SELECT JSON_ARRAY(SELECT i FROM (VALUES (NULL::int[]), ('{1,2}'), (NULL), (NULL), ('{3,4}'), (NULL)) foo(i) NULL ON NULL);
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--SELECT JSON_ARRAY(SELECT i FROM (VALUES (NULL::int[]), ('{1,2}'), (NULL), (NULL), ('{3,4}'), (NULL)) foo(i) NULL ON NULL RETURNING jsonb);
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SELECT JSON_ARRAY(SELECT i FROM (VALUES (3), (1), (NULL), (2)) foo(i) ORDER BY i);
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-- Should fail
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SELECT JSON_ARRAY(SELECT FROM (VALUES (1)) foo(i));
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SELECT JSON_ARRAY(SELECT i, i FROM (VALUES (1)) foo(i));
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SELECT JSON_ARRAY(SELECT * FROM (VALUES (1, 2)) foo(i, j));
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-- JSON_ARRAYAGG()
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SELECT JSON_ARRAYAGG(i) IS NULL,
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JSON_ARRAYAGG(i RETURNING jsonb) IS NULL
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FROM generate_series(1, 0) i;
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SELECT JSON_ARRAYAGG(i),
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JSON_ARRAYAGG(i RETURNING jsonb)
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FROM generate_series(1, 5) i;
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SELECT JSON_ARRAYAGG(i ORDER BY i DESC)
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FROM generate_series(1, 5) i;
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SELECT JSON_ARRAYAGG(i::text::json)
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FROM generate_series(1, 5) i;
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SELECT JSON_ARRAYAGG(JSON_ARRAY(i, i + 1 RETURNING text) FORMAT JSON)
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FROM generate_series(1, 5) i;
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SELECT JSON_ARRAYAGG(NULL),
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JSON_ARRAYAGG(NULL RETURNING jsonb)
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FROM generate_series(1, 5);
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SELECT JSON_ARRAYAGG(NULL NULL ON NULL),
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JSON_ARRAYAGG(NULL NULL ON NULL RETURNING jsonb)
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FROM generate_series(1, 5);
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\x
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SELECT
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JSON_ARRAYAGG(bar) as no_options,
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JSON_ARRAYAGG(bar RETURNING jsonb) as returning_jsonb,
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JSON_ARRAYAGG(bar ABSENT ON NULL) as absent_on_null,
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JSON_ARRAYAGG(bar ABSENT ON NULL RETURNING jsonb) as absentonnull_returning_jsonb,
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JSON_ARRAYAGG(bar NULL ON NULL) as null_on_null,
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JSON_ARRAYAGG(bar NULL ON NULL RETURNING jsonb) as nullonnull_returning_jsonb,
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JSON_ARRAYAGG(foo) as row_no_options,
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JSON_ARRAYAGG(foo RETURNING jsonb) as row_returning_jsonb,
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JSON_ARRAYAGG(foo ORDER BY bar) FILTER (WHERE bar > 2) as row_filtered_agg,
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JSON_ARRAYAGG(foo ORDER BY bar RETURNING jsonb) FILTER (WHERE bar > 2) as row_filtered_agg_returning_jsonb
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FROM
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(VALUES (NULL), (3), (1), (NULL), (NULL), (5), (2), (4), (NULL)) foo(bar);
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\x
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SELECT
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bar, JSON_ARRAYAGG(bar) FILTER (WHERE bar > 2) OVER (PARTITION BY foo.bar % 2)
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FROM
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(VALUES (NULL), (3), (1), (NULL), (NULL), (5), (2), (4), (NULL), (5), (4)) foo(bar);
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-- JSON_OBJECTAGG()
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SELECT JSON_OBJECTAGG('key': 1) IS NULL,
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JSON_OBJECTAGG('key': 1 RETURNING jsonb) IS NULL
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WHERE FALSE;
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SELECT JSON_OBJECTAGG(NULL: 1);
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SELECT JSON_OBJECTAGG(NULL: 1 RETURNING jsonb);
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SELECT
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JSON_OBJECTAGG(i: i),
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-- JSON_OBJECTAGG(i VALUE i),
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-- JSON_OBJECTAGG(KEY i VALUE i),
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JSON_OBJECTAGG(i: i RETURNING jsonb)
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FROM
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generate_series(1, 5) i;
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SELECT
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JSON_OBJECTAGG(k: v),
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JSON_OBJECTAGG(k: v NULL ON NULL),
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JSON_OBJECTAGG(k: v ABSENT ON NULL),
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JSON_OBJECTAGG(k: v RETURNING jsonb),
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JSON_OBJECTAGG(k: v NULL ON NULL RETURNING jsonb),
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JSON_OBJECTAGG(k: v ABSENT ON NULL RETURNING jsonb)
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FROM
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(VALUES (1, 1), (1, NULL), (2, NULL), (3, 3)) foo(k, v);
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SELECT JSON_OBJECTAGG(k: v WITH UNIQUE KEYS)
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FROM (VALUES (1, 1), (1, NULL), (2, 2)) foo(k, v);
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SELECT JSON_OBJECTAGG(k: v ABSENT ON NULL WITH UNIQUE KEYS)
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FROM (VALUES (1, 1), (1, NULL), (2, 2)) foo(k, v);
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SELECT JSON_OBJECTAGG(k: v ABSENT ON NULL WITH UNIQUE KEYS)
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FROM (VALUES (1, 1), (0, NULL), (3, NULL), (2, 2), (4, NULL)) foo(k, v);
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SELECT JSON_OBJECTAGG(k: v WITH UNIQUE KEYS RETURNING jsonb)
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FROM (VALUES (1, 1), (1, NULL), (2, 2)) foo(k, v);
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SELECT JSON_OBJECTAGG(k: v ABSENT ON NULL WITH UNIQUE KEYS RETURNING jsonb)
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FROM (VALUES (1, 1), (1, NULL), (2, 2)) foo(k, v);
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-- Test JSON_OBJECT deparsing
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EXPLAIN (VERBOSE, COSTS OFF)
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SELECT JSON_OBJECT('foo' : '1' FORMAT JSON, 'bar' : 'baz' RETURNING json);
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CREATE VIEW json_object_view AS
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SELECT JSON_OBJECT('foo' : '1' FORMAT JSON, 'bar' : 'baz' RETURNING json);
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\sv json_object_view
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DROP VIEW json_object_view;
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-- Test JSON_ARRAY deparsing
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EXPLAIN (VERBOSE, COSTS OFF)
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SELECT JSON_ARRAY('1' FORMAT JSON, 2 RETURNING json);
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CREATE VIEW json_array_view AS
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SELECT JSON_ARRAY('1' FORMAT JSON, 2 RETURNING json);
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\sv json_array_view
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DROP VIEW json_array_view;
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-- Test JSON_OBJECTAGG deparsing
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EXPLAIN (VERBOSE, COSTS OFF)
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SELECT JSON_OBJECTAGG(i: ('111' || i)::bytea FORMAT JSON WITH UNIQUE RETURNING text) FILTER (WHERE i > 3)
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FROM generate_series(1,5) i;
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EXPLAIN (VERBOSE, COSTS OFF)
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SELECT JSON_OBJECTAGG(i: ('111' || i)::bytea FORMAT JSON WITH UNIQUE RETURNING text) OVER (PARTITION BY i % 2)
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FROM generate_series(1,5) i;
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CREATE VIEW json_objectagg_view AS
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SELECT JSON_OBJECTAGG(i: ('111' || i)::bytea FORMAT JSON WITH UNIQUE RETURNING text) FILTER (WHERE i > 3)
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FROM generate_series(1,5) i;
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\sv json_objectagg_view
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DROP VIEW json_objectagg_view;
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-- Test JSON_ARRAYAGG deparsing
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EXPLAIN (VERBOSE, COSTS OFF)
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SELECT JSON_ARRAYAGG(('111' || i)::bytea FORMAT JSON NULL ON NULL RETURNING text) FILTER (WHERE i > 3)
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FROM generate_series(1,5) i;
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EXPLAIN (VERBOSE, COSTS OFF)
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SELECT JSON_ARRAYAGG(('111' || i)::bytea FORMAT JSON NULL ON NULL RETURNING text) OVER (PARTITION BY i % 2)
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FROM generate_series(1,5) i;
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CREATE VIEW json_arrayagg_view AS
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SELECT JSON_ARRAYAGG(('111' || i)::bytea FORMAT JSON NULL ON NULL RETURNING text) FILTER (WHERE i > 3)
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FROM generate_series(1,5) i;
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\sv json_arrayagg_view
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DROP VIEW json_arrayagg_view;
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-- Test JSON_ARRAY(subquery) deparsing
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EXPLAIN (VERBOSE, COSTS OFF)
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SELECT JSON_ARRAY(SELECT i FROM (VALUES (1), (2), (NULL), (4)) foo(i) RETURNING jsonb);
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CREATE VIEW json_array_subquery_view AS
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SELECT JSON_ARRAY(SELECT i FROM (VALUES (1), (2), (NULL), (4)) foo(i) RETURNING jsonb);
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\sv json_array_subquery_view
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DROP VIEW json_array_subquery_view;
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-- IS JSON predicate
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SELECT NULL IS JSON;
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SELECT NULL IS NOT JSON;
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SELECT NULL::json IS JSON;
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SELECT NULL::jsonb IS JSON;
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SELECT NULL::text IS JSON;
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SELECT NULL::bytea IS JSON;
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SELECT NULL::int IS JSON;
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SELECT '' IS JSON;
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SELECT bytea '\x00' IS JSON;
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CREATE TABLE test_is_json (js text);
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INSERT INTO test_is_json VALUES
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(NULL),
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(''),
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('123'),
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('"aaa "'),
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('true'),
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('null'),
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('[]'),
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('[1, "2", {}]'),
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('{}'),
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('{ "a": 1, "b": null }'),
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('{ "a": 1, "a": null }'),
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('{ "a": 1, "b": [{ "a": 1 }, { "a": 2 }] }'),
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('{ "a": 1, "b": [{ "a": 1, "b": 0, "a": 2 }] }'),
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('aaa'),
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('{a:1}'),
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('["a",]');
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SELECT
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js,
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js IS JSON "IS JSON",
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js IS NOT JSON "IS NOT JSON",
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js IS JSON VALUE "IS VALUE",
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js IS JSON OBJECT "IS OBJECT",
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js IS JSON ARRAY "IS ARRAY",
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js IS JSON SCALAR "IS SCALAR",
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js IS JSON WITHOUT UNIQUE KEYS "WITHOUT UNIQUE",
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js IS JSON WITH UNIQUE KEYS "WITH UNIQUE"
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FROM
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test_is_json;
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SELECT
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js,
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js IS JSON "IS JSON",
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js IS NOT JSON "IS NOT JSON",
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js IS JSON VALUE "IS VALUE",
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js IS JSON OBJECT "IS OBJECT",
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js IS JSON ARRAY "IS ARRAY",
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js IS JSON SCALAR "IS SCALAR",
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js IS JSON WITHOUT UNIQUE KEYS "WITHOUT UNIQUE",
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js IS JSON WITH UNIQUE KEYS "WITH UNIQUE"
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FROM
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(SELECT js::json FROM test_is_json WHERE js IS JSON) foo(js);
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SELECT
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js0,
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js IS JSON "IS JSON",
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js IS NOT JSON "IS NOT JSON",
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js IS JSON VALUE "IS VALUE",
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js IS JSON OBJECT "IS OBJECT",
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js IS JSON ARRAY "IS ARRAY",
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js IS JSON SCALAR "IS SCALAR",
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js IS JSON WITHOUT UNIQUE KEYS "WITHOUT UNIQUE",
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js IS JSON WITH UNIQUE KEYS "WITH UNIQUE"
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FROM
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(SELECT js, js::bytea FROM test_is_json WHERE js IS JSON) foo(js0, js);
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SELECT
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js,
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js IS JSON "IS JSON",
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js IS NOT JSON "IS NOT JSON",
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js IS JSON VALUE "IS VALUE",
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js IS JSON OBJECT "IS OBJECT",
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js IS JSON ARRAY "IS ARRAY",
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js IS JSON SCALAR "IS SCALAR",
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js IS JSON WITHOUT UNIQUE KEYS "WITHOUT UNIQUE",
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js IS JSON WITH UNIQUE KEYS "WITH UNIQUE"
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FROM
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(SELECT js::jsonb FROM test_is_json WHERE js IS JSON) foo(js);
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-- Test IS JSON deparsing
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EXPLAIN (VERBOSE, COSTS OFF)
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SELECT '1' IS JSON AS "any", ('1' || i) IS JSON SCALAR AS "scalar", '[]' IS NOT JSON ARRAY AS "array", '{}' IS JSON OBJECT WITH UNIQUE AS "object" FROM generate_series(1, 3) i;
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CREATE VIEW is_json_view AS
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SELECT '1' IS JSON AS "any", ('1' || i) IS JSON SCALAR AS "scalar", '[]' IS NOT JSON ARRAY AS "array", '{}' IS JSON OBJECT WITH UNIQUE AS "object" FROM generate_series(1, 3) i;
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\sv is_json_view
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DROP VIEW is_json_view;
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