DROP DATABASE IF EXISTS json_length_db;
CREATE DATABASE json_length_db;
USE json_length_db;
# ----------------------------------------------------------------------
# Test of JSON_LENGTH function.
# ----------------------------------------------------------------------
CREATE TABLE t1(l LONGTEXT) ENGINE = columnstore;
# Invalid json text
INSERT INTO t1 VALUES(null);
INSERT INTO t1 VALUES('1');
INSERT INTO t1 VALUES('abc');
INSERT INTO t1 VALUES('"abc"');
INSERT INTO t1 VALUES('true');
INSERT INTO t1 VALUES('false');
INSERT INTO t1 VALUES('null');
error ER_INVALID_JSON_TEXT_IN_PARAM
SELECT JSON_LENGTH(l) FROM t1;
JSON_LENGTH(l)
NULL
1
NULL
1
1
1
1
# Valid json text 
TRUNCATE t1;
INSERT INTO t1 VALUES('{}');
INSERT INTO t1 VALUES('{ "a" : 100, "b" : 200 }');
INSERT INTO t1 VALUES('{ "a" : 100, "b" : [ 300, 400, 500 ] }');
INSERT INTO t1 VALUES('[]');
INSERT INTO t1 VALUES('[ null, "foo", true, 1.1 ]');
INSERT INTO t1 VALUES('[ null, "foo", true, { "a" : "b", "c" : "d" } ]');
INSERT INTO t1 VALUES('"foo"');
INSERT INTO t1 VALUES('1.2');
SELECT JSON_LENGTH(l) FROM t1;
JSON_LENGTH(l)
0
2
2
0
4
4
1
1
# Bad path expressions
TRUNCATE t1;
INSERT INTO t1 VALUES('true');
error ER_INVALID_JSON_PATH
SELECT JSON_LENGTH(l, 'c$') FROM t1;
JSON_LENGTH(l, 'c$')
NULL
TRUNCATE t1;
INSERT INTO t1 VALUES('{ "foo" : [ true, false ] }');
error ER_INVALID_JSON_PATH
SELECT JSON_LENGTH(l, '$.foo[bar]') FROM t1;
JSON_LENGTH(l, '$.foo[bar]')
NULL
# wildcards not allowed in path expressions for this function
TRUNCATE t1;
INSERT INTO t1 VALUES('true');
error ER_INVALID_JSON_PATH_WILDCARD
SELECT JSON_LENGTH(l, '$.*') FROM t1;
JSON_LENGTH(l, '$.*')
NULL
TRUNCATE t1;
INSERT INTO t1 VALUES('true');
error ER_INVALID_JSON_PATH_WILDCARD
SELECT JSON_LENGTH(l, '$.foo**.bar') FROM t1;
JSON_LENGTH(l, '$.foo**.bar')
NULL
# Error ER_INVALID_JSON_TEXT_IN_PARAM
TRUNCATE t1;
INSERT INTO t1 VALUES('abc');
INSERT INTO t1 VALUES('[ "a", true, "b" , { "e" : false }, "c" , null');
SELECT JSON_LENGTH(l) FROM t1;
JSON_LENGTH(l)
NULL
NULL
# Path exist
TRUNCATE t1;
INSERT INTO t1 VALUES('[ 1, [ 2, 3, 4 ], 5 ]');
SELECT JSON_LENGTH(l, '$[0]') FROM t1;
JSON_LENGTH(l, '$[0]')
1
SELECT JSON_LENGTH(l, '$[1]') FROM t1;
JSON_LENGTH(l, '$[1]')
3
SELECT JSON_LENGTH(l, '$[2]') FROM t1;
JSON_LENGTH(l, '$[2]')
1
SELECT JSON_LENGTH(l, '$[2][0]') FROM t1;
JSON_LENGTH(l, '$[2][0]')
1
TRUNCATE t1;
INSERT INTO t1 VALUES('[ 1, [ 2, 3, 4 ], {"a": 1} ]');
SELECT JSON_LENGTH(l, '$[2][0]') FROM t1;
JSON_LENGTH(l, '$[2][0]')
1
TRUNCATE t1;
INSERT INTO t1 VALUES('[ 1, { "a": true, "b": false, "c": null }, 5 ]');
SELECT JSON_LENGTH(l, '$[1]') FROM t1;
JSON_LENGTH(l, '$[1]')
3
TRUNCATE t1;
INSERT INTO t1 VALUES('{ "a" : 123, "b" : [ 123, 456, 789 ] }');
SELECT JSON_LENGTH(l) FROM t1;
JSON_LENGTH(l)
2
SELECT JSON_LENGTH(l, '$.b') FROM t1;
JSON_LENGTH(l, '$.b')
3
SELECT JSON_LENGTH(l, '$.c') FROM t1;
JSON_LENGTH(l, '$.c')
NULL
# No-existent path
TRUNCATE t1;
INSERT INTO t1 VALUES('[ 1, [ 2, 3, 4 ], 5 ]');
SELECT JSON_LENGTH(l, '$[2][1]') FROM t1;
JSON_LENGTH(l, '$[2][1]')
NULL
DROP TABLE t1;
DROP DATABASE json_length_db;