--source ../include/have_columnstore.inc
--disable_warnings

DROP DATABASE IF EXISTS json_merge_db;
--enable_warnings

CREATE DATABASE json_merge_db; 
USE json_merge_db;
--echo # ----------------------------------------------------------------------
--echo # Test of JSON_MERGE function.
--echo # ----------------------------------------------------------------------
CREATE TABLE t1(l TEXT, r TEXT) ENGINE = columnstore;
INSERT INTO t1 VALUES('[1, 2, 3]','[4, 5, 6]');

--echo # Not enough args
--error ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT
SELECT JSON_MERGE() FROM t1;
--error ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT
SELECT JSON_MERGE(l) FROM t1;
--error ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT
SELECT JSON_MERGE(NULL) FROM t1;

--echo # Null args
SELECT JSON_MERGE(NULL, r) FROM t1;
SELECT JSON_MERGE(l, NULL) FROM t1;
SELECT JSON_MERGE(NULL, l, r) FROM t1;
SELECT JSON_MERGE(l, NULL, r) FROM t1;
SELECT JSON_MERGE(l, r, NULL) FROM t1;

--echo # Invalid JSON text
--echo error ER_INVALID_JSON_TEXT_IN_PARAM
SELECT JSON_MERGE(l, '[4, 5, 6') FROM t1;
--echo error ER_INVALID_JSON_TEXT_IN_PARAM
SELECT JSON_MERGE('[1, 2, 3', r) FROM t1;

--echo # Good JSON_MERGE() Expressions 
TRUNCATE t1;
INSERT INTO t1 VALUES('1', '2' );
INSERT INTO t1 VALUES('1', '[2, 3]' );
INSERT INTO t1 VALUES('[1, 2]', '3' );
INSERT INTO t1 VALUES('1', '{ "a": 2 }' );
INSERT INTO t1 VALUES('{ "a": 2 }', '1' );
INSERT INTO t1 VALUES('[1, 2]', '[3, 4]' );
INSERT INTO t1 VALUES('{ "a": 2 }', '{ "b": 3}' );
INSERT INTO t1 VALUES('[1, 2]', '{ "a": 2 }' );
INSERT INTO t1 VALUES('{ "a": 2 }', '[1, 2]' );

INSERT INTO t1 VALUES('{"a": 1, "b": 2 }', '{"b": 3, "d": 4 }' );
INSERT INTO t1 VALUES('{"a": 1, "b": 2 }', '{"b": [3, 4], "d": 4 }' );
INSERT INTO t1 VALUES('{"a": 1, "b": [2, 3] }', '{"b": 4, "d": 4 }' );
INSERT INTO t1 VALUES('{"a": 1, "b": 2 }', '{"b": {"e": 7, "f": 8}, "d": 4 }' );
INSERT INTO t1 VALUES('{"b": {"e": 7, "f": 8}, "d": 4 }', '{"a": 1, "b": 2 }' );
INSERT INTO t1 VALUES('{"a": 1, "b": [2, 9] }', '{"b": [10, 11], "d": 4 }' );
INSERT INTO t1 VALUES('{"a": 1, "b": [2, 9] }', '{"b": {"e": 7, "f": 8}, "d": 4 }' );
INSERT INTO t1 VALUES('{"b": {"e": 7, "f": 8}, "d": 4 }', '{"a": 1, "b": [2, 9] }' );
INSERT INTO t1 VALUES('{"b": {"e": 7, "f": 8}, "d": 4 }', '{ "a": 1, "b": {"e": 20, "g": 21 } }' );
INSERT INTO t1 VALUES('{ "a" : "foo", "b" : [ true, { "c" : 123 } ] }', '[ 5, 6]');
INSERT INTO t1 VALUES('{ "a" : "foo", "b" : [ true, { "c" : 123 } ] }', '{ "b": [ false, 34 ] }');
INSERT INTO t1 VALUES('{ "a" : "foo", "b" : [ true, { "c" : 123 } ] }','{ "b": "bar" }');
INSERT INTO t1 VALUES('{ "a" : { "b" : 1 } }','{ "a" : { "c" : 1 } }');

SELECT JSON_MERGE(l, r) FROM t1;


CREATE TABLE t2(l1 TEXT, l2 TEXT, l3 TEXT) ENGINE = columnstore;
INSERT INTO t2 VALUES('1', '2', '3' );
INSERT INTO t2 VALUES('[1, 2 ]', '3', '[4, 5]' );
INSERT INTO t2 VALUES
( 
    '{ "a": true, "b": { "c": 3, "d": 4 }, "e": [ 1, 2 ] }',
    '{ "d": false, "b": { "g": 3, "d": 5 }, "f": [ 1, 2 ] }',
    '{ "m": true, "b": { "h": 8, "d": 4 }, "e": [ 3, 4 ] }'
);

SELECT JSON_MERGE(l1, l2, l3) from t2;

DROP TABLE t1;
DROP TABLE t2;
DROP DATABASE json_merge_db;