create or replace table t1(a json); show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (json_valid(`a`)) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci create or replace table t1(a json character set utf8); ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'character set utf8)' at line 1 create or replace table t1(a json default '{a:1}'); show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT '{a:1}' CHECK (json_valid(`a`)) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci create or replace table t1(a json not null check (json_valid(a))); show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL CHECK (json_valid(`a`)) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci insert t1 values ('[]'); insert t1 values ('a'); ERROR 23000: CONSTRAINT `t1.a` failed for `test`.`t1` create or replace table t1(a json not null); show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL CHECK (json_valid(`a`)) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci insert t1 values ('[]'); insert t1 values ('a'); ERROR 23000: CONSTRAINT `t1.a` failed for `test`.`t1` set timestamp=unix_timestamp('2010:11:12 13:14:15'); create or replace table t1(a json default(json_object('now', now()))); show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT json_object('now',current_timestamp()) CHECK (json_valid(`a`)) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci insert t1 values (); select * from t1; a {"now": "2010-11-12 13:14:15"} drop table t1; create table t1 (t json) as select json_quote('foo') as t; create table t2 (a json) as select json_quote('foo') as t; create table t3 like t1; select * from t1; t "foo" show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `t` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (json_valid(`t`)) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci show create table t2; Table Create Table t2 CREATE TABLE `t2` ( `a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (json_valid(`a`)), `t` varchar(38) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci show create table t3; Table Create Table t3 CREATE TABLE `t3` ( `t` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (json_valid(`t`)) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci drop table t1,t2,t3; create table t1 (t json check (length(t) > 0)); show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `t` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL CHECK (octet_length(`t`) > 0) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci drop table t1; create table t1 (t text) engine=myisam; insert into t1 values ("{}"),(""); create table t2 (t json) select t from t1; ERROR 23000: CONSTRAINT `t2.t` failed for `test`.`t2` select * from t2; ERROR 42S02: Table 'test.t2' doesn't exist drop table t1; create or replace table t1(a json default(json_object('now', 1)) check (json_valid(a))); insert into t1 values (); insert into t1 values ("{}"); insert into t1 values ("xxx"); ERROR 23000: CONSTRAINT `t1.a` failed for `test`.`t1` select * from t1; a {"now": 1} {} show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `a` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT json_object('now',1) CHECK (json_valid(`a`)) ) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci drop table t1; select cast('{a:1}' as text); ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'text)' at line 1 select cast('{a:1}' as json); ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'json)' at line 1 # # Start of 10.5 tests # # # MDEV-17832 Protocol: extensions for Pluggable types and JSON, GEOMETRY # SET NAMES utf8; CREATE TABLE t1 ( js0 JSON, js1 TEXT CHECK (JSON_VALID(js1)), js2 TEXT CHECK (LENGTH(js2) > 0 AND JSON_VALID(js2)), js3 TEXT CHECK (LENGTH(js2) > 0 OR JSON_VALID(js2)) ) CHARACTER SET utf8; SELECT * FROM t1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 t1 js0 js0 252 (format=json) 4294967295 0 Y 144 0 33 def test t1 t1 js1 js1 252 (format=json) 196605 0 Y 16 0 33 def test t1 t1 js2 js2 252 (format=json) 196605 0 Y 16 0 33 def test t1 t1 js3 js3 252 196605 0 Y 16 0 33 js0 js1 js2 js3 SELECT js0, JSON_COMPACT(js0), JSON_COMPACT('{}') FROM t1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 t1 js0 js0 252 (format=json) 4294967295 0 Y 144 0 33 def JSON_COMPACT(js0) 251 (format=json) 4294967295 0 Y 128 0 33 def JSON_COMPACT('{}') 253 (format=json) 6 0 Y 0 0 33 js0 JSON_COMPACT(js0) JSON_COMPACT('{}') DROP TABLE t1; # # MDEV-27361 Hybrid functions with JSON arguments do not send format metadata # CREATE TABLE t1 (a JSON); INSERT INTO t1 VALUES ('{"a":"b"}'); SELECT a, JSON_COMPACT(a), COALESCE(a) FROM t1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def test t1 t1 a a 252 (format=json) 4294967295 9 Y 144 0 33 def JSON_COMPACT(a) 251 (format=json) 4294967295 9 Y 128 0 33 def COALESCE(a) 251 (format=json) 4294967295 9 Y 128 39 33 a JSON_COMPACT(a) COALESCE(a) {"a":"b"} {"a":"b"} {"a":"b"} SELECT JSON_ARRAYAGG(1), JSON_ARRAYAGG(a) FROM t1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def JSON_ARRAYAGG(1) 252 (format=json) 9437184 3 Y 0 0 33 def JSON_ARRAYAGG(a) 252 (format=json) 12582912 11 Y 128 0 33 JSON_ARRAYAGG(1) JSON_ARRAYAGG(a) [1] [{"a":"b"}] SELECT JSON_OBJECTAGG('a','b'), JSON_OBJECTAGG('a',a) FROM t1; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def JSON_OBJECTAGG('a','b') 252 (format=json) 9437184 9 Y 0 0 33 def JSON_OBJECTAGG('a',a) 252 (format=json) 12582912 15 Y 128 0 33 JSON_OBJECTAGG('a','b') JSON_OBJECTAGG('a',a) {"a":"b"} {"a":{"a":"b"}} DROP TABLE t1; # # MDEV-27018 IF and COALESCE lose "json" property # SELECT json_object('a', (SELECT json_objectagg(b, c) FROM (SELECT 'b','c') d)) AS j FROM DUAL; Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr def j 250 (format=json) 9437283 16 Y 0 39 33 j {"a": {"b":"c"}} # # MDEV-26506 Over-quoted JSON when combining JSON_ARRAYAGG with JSON_OBJECT # # maintain JSON property through internal temporary tables create table t1 (a varchar(30)); insert into t1 values ('root'); select json_object('attr2',o) from (select a, json_arrayagg(json_object('attr1', a)) as o from t1) u; json_object('attr2',o) {"attr2": [{"attr1": "root"}]} drop table t1; create view v1 as select json_object(_latin1 'a', _latin1'b') as v1_json; select v1_json from v1; v1_json {"a": "b"} select json_arrayagg(v1_json) from v1; json_arrayagg(v1_json) [{"a": "b"}] drop view v1; # # End of 10.5 tests #