MySQL Compatibility

MySQL Compatibility

MatrixOne SQL syntax conforms with MySQL 8.0.23 version.

SQL Type	SQL Syntax	Compability with MySQL8.0.23
Data Definition Language(DDL)	CREATE DATABASE	A database with Chinese name is not supported.
		Names with Latins support limitedly.
		`CHARSET`, `COLLATE`, `ENCRYPTION` can be used but don’t work.
	CREATE TABLE	Partition tables are not supported.
		Create table .. as clause is not supported now.
		All column level constraints are not supported now.
		KEY(column) is not supported yet.
		AUTO_INCREMENT is supported limitedly. The custom starting value is not supported yet.
	CREATE other projects	CREATE/DROP INDEX is not supported.
	ALTER	Not supported now.
	DROP DATABASE	Same as MySQL.
	DROP TABLE	Same as MySQL.
	CREAT VIEW	The `with check option` clause is not supported yet.
Data Manipulation Language (DML)	UPDATA	Same as MySQL.
	DELETE	Same as MySQL.
	INSERT	LOW_PRIORITY, DELAYED, HIGH_PRIORITY are not supported now.
		INSERT INTO VALUES with function or expression is not supported now.
		Batch Insert can be supported up to 160,000 rows.
		ON DUPLICATE KEY UPDATE is not supported now.
		DELAYED is not supported now.
		Names with Latins support limitedly.
		The current SQL mode is just like only_full_group_by mode in MySQL.
	SELECT	Table alias is not supported in GROUP BY.
		Distinct is limitedly support.
		SELECT…FOR UPDATE clause is not supported now.
		INTO OUTFILE is limitedly support.
	LOAD DATA	Only csv files can be loaded currently.
		The enclosed character should be “”.
		FIELDS TERMINATED BY should be “,” or “
		LINES TERMINATED BY should be “\n”.
		SET is supported limitedly. Only `SET columns_name=nullif(expr1,expr2)` is supported.
		Local key word is not supported now.
		Relative path is limited supported now. Only based on mo-server file can be supported.
	JOIN	Same as MySQL.
	SUBQUERY	Non-scalar subquery is supported limitedly.
Database Administration Statements	SHOW	`SHOW` statement is supported limitedly.
Utility Statements	Explain	The result of explain a SQL is different with MySQL.
		`json` output is not supported yet.
	Other statements	Not supported now.
Data Types	Boolean	Different from MySQL’s boolean which is the same as int , MatrixOne’s boolean is a new type, its value can only be true or false.
	Int/Bigint/Smallint/Tinyint	Same as MySQL.
	char/varchar	Same as MySQL.
	Float/double	The precision is a bit different with MySQL.
	DECIMAL	The max precision is 38 digits.
	Date	Only ‘YYYY-MM-DD’ and ‘YYYYMMDD’ formats are supported.
	Datetime	Only ‘YYYY-MM-DD HH:MM:SS’ and ‘YYYYMMDD HH:MM:SS’ formats are supported.
	Timestamp	Same as MySQL.
	Other types	Not supported now.
Operators	“+”,”-“,”*”,”/“	Same as MySQL.
	DIV, %, MOD	Same as MySQL.
	LIKE	Same as MySQL.
	IN	Supported for constant lists
	NOT, AND, &&,OR, “\|\|”	Same as MySQL.
	CAST	Supported with different conversion rules.
Functions	MAX, MIN, COUNT, AVG, SUM	Same as MySQL.
	any_value	Any_value is an aggregate function in MatrixOne. Cannot be used in group by or filter condition.
	`REGEXP_INSTR()`,`REGEXP_LIKE()`,`REGEXP_REPLACE()`,`REGEXP_SUBSTR()`	The third parameter is not supported yet
	to_date	Only constants are supported for date entries
System command	SHOW GRANTS FOR USERS	Only the permissions of directly authorized roles can be displayed. The rights of inherited roles cannot be shown.