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MDEV-30145: JSON_TABLE: allow to retrieve the key when iterating on JSON
objects Idea behind implementation: We get the json object specified by the json path. Then, transform it into key-value pairs by going over the json. Get each key-value pair one-by-one and return the result.
This commit is contained in:
Rucha Deodhar
@@ -671,8 +671,8 @@ DROP TABLE t1;
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SELECT JSON_EXTRACT( '{"foo":"bar"}', '$[*].*' );
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JSON_EXTRACT( '{"foo":"bar"}', '$[*].*' )
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NULL
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SELECT JSON_EXTRACT( '{"foo":"bar"}', '$[*]' );
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JSON_EXTRACT( '{"foo":"bar"}', '$[*]' )
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SELECT JSON_EXTRACT( '{"foo":"bar"}', '$[*]');
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JSON_EXTRACT( '{"foo":"bar"}', '$[*]')
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NULL
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select JSON_EXTRACT('{"name":"value"}', '$.name') = 'value';
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JSON_EXTRACT('{"name":"value"}', '$.name') = 'value'
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@@ -4759,3 +4759,191 @@ SELECT JSON_SCHEMA_VALID(NULL, NULL);
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JSON_SCHEMA_VALID(NULL, NULL)
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NULL
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# End of 11.1 test
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# Beginning of 11.2
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#
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# MDEV-30145: JSON_TABLE: allow to retrieve the key when iterating on JSON objects
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#
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# Checking json table with NULL and empty json doc
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SELECT jt.*
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FROM JSON_TABLE(
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NULL, '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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# With Empty and NULL
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SELECT JSON_KEY_VALUE(NULL, '$.a');
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JSON_KEY_VALUE(NULL, '$.a')
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NULL
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SELECT JSON_KEY_VALUE('', '$.a');
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JSON_KEY_VALUE('', '$.a')
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NULL
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SELECT JSON_KEY_VALUE('[1,2,3]', '');
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JSON_KEY_VALUE('[1,2,3]', '')
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NULL
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SELECT JSON_KEY_VALUE('[1,2,3]', NULL);
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JSON_KEY_VALUE('[1,2,3]', NULL)
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NULL
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# With scalars
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SELECT JSON_KEY_VALUE('2', '$');
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JSON_KEY_VALUE('2', '$')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('2', '$'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('"some_string"', '$');
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JSON_KEY_VALUE('"some_string"', '$')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('"some_string"', '$'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('"some_string"', '$.a');
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JSON_KEY_VALUE('"some_string"', '$.a')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('"some_string"', '$.a'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('"some_string"', '$[0]');
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JSON_KEY_VALUE('"some_string"', '$[0]')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('"some_string"', '$[0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('false', '$[0]');
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JSON_KEY_VALUE('false', '$[0]')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('false', '$[0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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# With non-scalar
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# With array
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SELECT JSON_KEY_VALUE('[]', '[0]');
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JSON_KEY_VALUE('[]', '[0]')
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NULL
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SELECT JSON_KEY_VALUE('[1, 2, 3]', '$[0]');
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JSON_KEY_VALUE('[1, 2, 3]', '$[0]')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[1, 2, 3]', '$[0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0]');
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JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0]')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0].a');
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JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0].a')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0].a'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0][1]');
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JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0][1]')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0][1]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1]');
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JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1]')
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[{"key": "key1", "value": "val1"}, {"key": "key2", "value": "val2"}]
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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key1 val1 1
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key2 val2 2
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SELECT JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1].key1');
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JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1].key1')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1].key1'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1]');
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JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1]')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1][0]');
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JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1][0]')
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[{"key": "key1", "value": "val1"}, {"key": "key2", "value": "val2"}]
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1][0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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key1 val1 1
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key2 val2 2
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# With object
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SELECT JSON_KEY_VALUE('{}', '$.key1');
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JSON_KEY_VALUE('{}', '$.key1')
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NULL
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SELECT JSON_KEY_VALUE('{"key1":"val1", "key2":"val2"}', '$');
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JSON_KEY_VALUE('{"key1":"val1", "key2":"val2"}', '$')
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[{"key": "key1", "value": "val1"}, {"key": "key2", "value": "val2"}]
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('{"key1":"val1", "key2":"val2"}', '$'), '$[*]'
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COLUMNS (k VARCHAR(11) PATH '$.key', v VARCHAR(5) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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key1 val1 1
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key2 val2 2
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SELECT JSON_KEY_VALUE('{"key1":"val1", "key2":"val2"}', '$.key1');
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JSON_KEY_VALUE('{"key1":"val1", "key2":"val2"}', '$.key1')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('{"key1":"val1", "key2":"val2"}', '$.key1'), '$[*]'
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COLUMNS (k VARCHAR(11) PATH '$.key', v VARCHAR(5) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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SELECT JSON_KEY_VALUE('{"key1":{"a":1, "b":2}, "key2":"val2"}', '$.key1');
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JSON_KEY_VALUE('{"key1":{"a":1, "b":2}, "key2":"val2"}', '$.key1')
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[{"key": "a", "value": 1}, {"key": "b", "value": 2}]
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('{"key1":{"a":1, "b":2}, "key2":"val2"}', '$.key1'), '$[*]'
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COLUMNS (k VARCHAR(11) PATH '$.key', v VARCHAR(5) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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a 1 1
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b 2 2
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SELECT JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.key1.b[3]');
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JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.key1.b[3]')
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[{"key": "some_key", "value": "some_val"}, {"key": "c", "value": 3}]
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.key1.b[3]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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some_key some_val 1
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c 3 2
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SELECT JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.key1.b[0]');
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JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.key1.b[0]')
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NULL
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.key1.b[0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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k v id
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# End of 11.2 test
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