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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
@ -338,7 +338,7 @@ DROP TABLE t1;
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# MDEV-12324 Wrong result (phantom array value) on JSON_EXTRACT.
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#
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SELECT JSON_EXTRACT( '{"foo":"bar"}', '$[*].*' );
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SELECT JSON_EXTRACT( '{"foo":"bar"}', '$[*]' );
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SELECT JSON_EXTRACT( '{"foo":"bar"}', '$[*]');
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#
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# MDEV-12604 Comparison of JSON_EXTRACT result differs with Mysql.
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@ -3640,3 +3640,146 @@ SELECT JSON_SCHEMA_VALID(NULL, '{}');
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SELECT JSON_SCHEMA_VALID(NULL, NULL);
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--echo # End of 11.1 test
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--echo # Beginning of 11.2
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--echo #
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--echo # MDEV-30145: JSON_TABLE: allow to retrieve the key when iterating on JSON objects
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--echo #
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--echo # Checking json table with NULL and empty json doc
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SELECT jt.*
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FROM JSON_TABLE(
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NULL, '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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--echo # With Empty and NULL
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SELECT JSON_KEY_VALUE(NULL, '$.a');
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SELECT JSON_KEY_VALUE('', '$.a');
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SELECT JSON_KEY_VALUE('[1,2,3]', '');
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SELECT JSON_KEY_VALUE('[1,2,3]', NULL);
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--echo # With scalars
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SELECT JSON_KEY_VALUE('2', '$');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('2', '$'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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SELECT JSON_KEY_VALUE('"some_string"', '$');
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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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SELECT JSON_KEY_VALUE('"some_string"', '$.a');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('"some_string"', '$.a'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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SELECT JSON_KEY_VALUE('"some_string"', '$[0]');
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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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SELECT JSON_KEY_VALUE('false', '$[0]');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('false', '$[0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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--echo # With non-scalar
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--echo # With array
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SELECT JSON_KEY_VALUE('[]', '[0]');
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SELECT JSON_KEY_VALUE('[1, 2, 3]', '$[0]');
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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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SELECT JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0]');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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SELECT JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0].a');
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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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SELECT JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0][1]');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, 2, 3], 2, 3]', '$[0][1]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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SELECT JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1]');
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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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SELECT JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1].key1');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, {"key1":"val1", "key2":"val2"}, 3], 2, 3]', '$[0][1].key1'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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SELECT JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1]');
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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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SELECT JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1][0]');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('[[1, [{"key1":"val1", "key2":"val2"}], 3], 2, 3]', '$[0][1][0]'), '$[*]'
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COLUMNS (k VARCHAR(20) PATH '$.key', v VARCHAR(20) PATH '$.value', id FOR ORDINALITY)) AS jt;
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--echo # With object
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SELECT JSON_KEY_VALUE('{}', '$.key1');
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SELECT JSON_KEY_VALUE('{"key1":"val1", "key2":"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 '$.value', id FOR ORDINALITY)) AS jt;
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SELECT JSON_KEY_VALUE('{"key1":"val1", "key2":"val2"}', '$.key1');
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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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SELECT JSON_KEY_VALUE('{"key1":{"a":1, "b":2}, "key2":"val2"}', '$.key1');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('{"key1":{"a":1, "b":2}, "key2":"val2"}', '$.key1'), '$[*]'
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COLUMNS (k VARCHAR(11) PATH '$.key', v VARCHAR(5) PATH '$.value', id FOR ORDINALITY)) AS jt;
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SELECT JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.key1.b[3]');
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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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SELECT JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.key1.b[0]');
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SELECT jt.*
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FROM JSON_TABLE(
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JSON_KEY_VALUE('{"key1":{"a":1, "b": [1,2,3, {"some_key":"some_val", "c":3}]}, "key2":"val2"}', '$.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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--echo # End of 11.2 test
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