MySQL->GaussDB¶
Data Type (MySQL) | Data Type (GaussDB) | Whether to Support Mapping |
|---|---|---|
CHAR | CHARACTER | Yes. If a column of this type in the source database contains characters that occupy more than one byte, increase the length of the column in the destination database. |
VARCHAR | CHARACTER VARYING() | Yes. If a column of this type in the source database contains characters that occupy more than one byte, increase the length of the column in the destination database. |
BINARY | BYTEA | Yes |
VARBINARY | BYTEA | Yes |
TINYBLOB | BYTEA | Yes |
BLOB | BYTEA/BLOB | Yes |
MEDIUMBLOB | BYTEA | Yes |
LONGBLOB | BYTEA | Yes |
TINYTEXT | TEXT | Yes |
TEXT | TEXT | Yes |
MEDIUMTEXT | TEXT | Yes |
LONGTEXT | TEXT | Yes |
ENUM | VARCHAR | Yes |
SET | VARCHAR | Yes |
TINYINT | SMALLINT | Yes |
SMALLINT | SMALLINT | Yes |
MEDIUMINT | INT | Supported |
INT | INT | Yes |
BIGINT | BIGINT | Yes |
FLOAT | FLOAT4 | Yes |
DOUBLE | FLOAT8 | Yes |
DATE | DATE | Yes |
DATETIME | TIMESTAMP WITHOUT TIME ZONE | Yes |
TIMESTAMP | TIMESTAMP WITH TIME ZONE | Yes |
TIME | TIME | Yes |
BIT | BIT | Yes |
Note
DATE values supported by MySQL range from '1000-01-01' to '9999-12-31'.
DATETIME values supported by MySQL range from '1000-01-01 00:00:00' to '9999-12-31 23:59:59'.
TIMESTAMP values supported by MySQL range from '1970-01-01 00:00:01' UTC to '2038-01-19 03:14:07' UTC.
For details, see official MySQL documentation.
For GaussDB, 0000-00-00 is an invalid date and will be converted to 1970-01-01 by DRS. For example, '0000-00-00' of the DATE type in MySQL is converted to '1970-01-01' by DRS, and '1000-00-31 23:59:59' of the DATETIME or TIMESTAMP type in MySQL is converted to '1970-01-01 00:00:00' by DRS.
TIME values supported by MySQL range from '-838:59:59' to '838:59:59'. For details, see the official MySQL documentation. For GaussDB, the minimum value of the TIME type is 00:00:00 and the maximum value is 24:00:00. In MySQL, if a value of the TIME type is less than 00:00:00 or greater than 24:00:00, DRS will convert it to 00:00:00.
YEAR value ranges supported by MySQL are 1901 to 2155 and 0000. For details, see official MySQL documentation. GaussDB does not have the YEAR type, so DRS will convert the YEAR type of MySQL to the SMALLINT type.
For MySQL databases, '0000' of the DATE type will be converted to 0 by DRS.