MariaDB ColumnStore一些限制和BUG总结

Posted 2020-10-13

限制
1、不支持CHARACTER SET语法
MariaDB [test]> create table t1(id int,name varchar(10) CHARACTER SET utf8)
-> engine=Columnstore;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.

2、不支持COLLATE语法
MariaDB [test]> create table t1(id int)
-> engine=Columnstore COLLATE=utf8_bin;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.

MariaDB [test]> create table t1(id int,name varchar(10) COLLATE utf8_bin)
-> engine=Columnstore;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.

3、不支持TEXT/BLOB
MariaDB [test]> create table t1(id int,info text)
-> engine=Columnstore;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.
MariaDB [test]>

MariaDB [test]> create table t1(id int,info blob)
-> engine=Columnstore;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.

4、不支持timestamp，后面的DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP全部删除
MariaDB [test]> create table t1(update_time timestamp)engine=Columnstore;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.

MariaDB [test]> create table t1(update_time timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP)
-> engine=Columnstore;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.

5、decimal不能大于18
MariaDB [test]> create table t1(money decimal(19,2)) engine=Columnstore;
ERROR 1815 (HY000): Internal error: CAL0009: (3)Create table failed due to  Syntax error: The maximum precision (total number of digits) that can be specified is 18

6、不支持ROW_FORMAT=COMPACT
MariaDB [test]> create table t1(id int)engine=Columnstore ROW_FORMAT=COMPACT;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.

7、varchar最大8000
MariaDB [test]> create table t1(name varchar(8001))engine=Columnstore;
ERROR 1815 (HY000): Internal error: CAL0009: (3)Create table failed due to char, varchar and varbinary length may not exceed 8000

BUG
不支持Reserved keywords保留关键字user、comment
https://jira.mariadb.org/browse/MCOL-1022
MariaDB [test]> create table user(id int)engine=Columnstore;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.

MariaDB [test]> create table t1(comment varchar(100))engine=Columnstore;
ERROR 1178 (42000): The storage engine for the table doesn’t support The syntax or the data type(s) is not supported by Columnstore. Please check the Columnstore syntax guide for supported syntax or data types.