This topic describes the column types that are supported for creating different constraints in a MySQL database and a MySQL tenant of OceanBase Database.
Supported types for a PRIMARY KEY column
The following table describes the column types that you can use to create a PRIMARY KEY column by executing the CREATE TABLE DDL statement in a MySQL database and a MySQL tenant of OceanBase Database.
Column type in a MySQL database |
Supported? |
Column type in a MySQL tenant of OceanBase Database |
Supported? |
|---|---|---|---|
| INT | Yes | INTEGER | Yes |
| TINYINT | Yes | TINYINT | Yes |
| SMALLINT | Yes | SMALLINT | Yes |
| MEDIUMINT | Yes | MEDIUMINT | Yes |
| BIGINT | Yes | BIGINT | Yes |
| BOOL | Yes | BOOLEAN | Yes |
| DECIMAL | Yes | DECIMAL | Yes |
| NUMERIC | Yes | NUMERIC | Yes |
| REAL | Yes | FLOAT | Yes |
| DOUBLE | Yes | DOUBLE | Yes |
| FLOAT | Yes | FLOAT | Yes |
| BIT | Yes | BIT | Yes |
| CHAR | Yes | CHAR | Yes |
| NCHAR | Yes | CHAR | Yes |
| VARCHAR | Yes | VARCHAR | Yes |
| BINARY | Yes | BINARY | Yes |
| VARBINARY | Yes | VARBINARY | Yes |
| LONG VARBINARY | Yes (You must specify the column length.) | BLOB | No |
| YEAR | Yes | YEAR | Yes |
| DATE | Yes | DATE | Yes |
| TIME | Yes | TIME | Yes |
| TIMESTAMP | Yes | TIMESTAMP | Yes |
| DATETIME | Yes | DATETIME | Yes |
| TINYBLOB | Yes (You must specify the column length.) | TINYBLOB | No |
| MEDIUMBLOB | Yes (You must specify the column length.) | MEDIUMBLOB | No |
| BLOB | Yes (You must specify the column length.) | BLOB | No |
| LONGBLOB | Yes (You must specify the column length.) | LONGBLOB | No |
| TINYTEXT | Yes (You must specify the column length.) | TINYTEXT | No |
| MEDIUMTEXT | Yes (You must specify the column length.) | MEDIUMTEXT | No |
| TEXT | Yes (You must specify the column length.) | TEXT | No |
| LONGTEXT | Yes (You must specify the column length.) | LONGTEXT | No |
| ENUM | Yes | ENUM | Yes |
| SET | Yes | SET | Yes |
| JSON | Yes | JSON | No |
Supported types for a UNIQUE KEY column
The column types that you can use to create a UNIQUE KEY column by executing the CREATE TABLE DDL statement in a MySQL database and a MySQL tenant of OceanBase Database are the same as those that you can use to create a PRIMARY KEY column.
Supported types for a KEY column
The column types that you can use to create a KEY column by executing the CREATE TABLE DDL statement in a MySQL database and a MySQL tenant of OceanBase Database are the same as those that you can use to create a PRIMARY KEY column.
Supported types for a FOREIGN KEY column
The column types that you can use to create a FOREIGN KEY column by executing the CREATE TABLE DDL statement in a MySQL database and a MySQL tenant of OceanBase Database are the same as those that you can use to create a PRIMARY KEY column.
Supported types for a FULLTEXT-indexed column
The following table describes the column types that you can use to create a FULLTEXT indexed column by executing the CREATE TABLE DDL statement in a MySQL database and a MySQL tenant of OceanBase Database.
Column type in a MySQL database |
Supported? |
Column type in a MySQL tenant of OceanBase Database |
Supported? |
|---|---|---|---|
| INT | No | INTEGER | No |
| TINYINT | No | TINYINT | No |
| SMALLINT | No | SMALLINT | No |
| MEDIUMINT | No | MEDIUMINT | No |
| BIGINT | No | BIGINT | No |
| BOOL | No | BOOLEAN | No |
| DECIMAL | No | DECIMAL | No |
| NUMERIC | No | NUMERIC | No |
| REAL | No | FLOAT | No |
| DOUBLE | No | DOUBLE | No |
| FLOAT | No | FLOAT | No |
| BIT | No | BIT | No |
| CHAR | Yes | CHAR | Yes |
| NCHAR | Yes | CHAR | Yes |
| VARCHAR | Yes | VARCHAR | Yes |
| BINARY | No | BINARY | Yes |
| VARBINARY | No | VARBINARY | Yes |
| LONG VARBINARY | No | BLOB | No |
| YEAR | No | YEAR | No |
| DATE | No | DATE | No |
| TIME | No | TIME | No |
| TIMESTAMP | No | TIMESTAMP | No |
| DATETIME | No | DATETIME | No |
| TINYBLOB | No | TINYBLOB | No |
| MEDIUMBLOB | No | MEDIUMBLOB | No |
| BLOB | No | BLOB | No |
| LONGBLOB | No | LONGBLOB | No |
| TINYTEXT | Yes | TINYTEXT | Yes |
| MEDIUMTEXT | Yes | MEDIUMTEXT | Yes |
| TEXT | Yes | TEXT | Yes |
| LONGTEXT | Yes | LONGTEXT | Yes |
| ENUM | No | ENUM | No |
| SET | No | SET | No |
| JSON | Yes | JSON | No |