Data Type Mapping
The driver maps types from the data source to the corresponding data type available in the chosen cache database. The following table shows the mappings between the data types configured in the schema and the data types in the database. Some schema types have synonyms which are all listed in the Schema column.
Data Type Mapping
Note: String columns can map to different data types depending on their length.
| Schema | .NET | JDBC | SQL Server | Derby | MySQL | Oracle | SQLite | Access |
| int, integer, int32 | Int32 | int | int | INTEGER | INT | NUMBER | integer | LONG |
| smallint, short, int16 | Int16 | short | smallint | SMALLINT | SMALLINT | NUMBER | integer | SHORT |
| double, float, real | Double | double | float | DOUBLE | DOUBLE | NUMBER | double | DOUBLE |
| date | DateTime | java.sql.Date | date | DATE | DATE | DATE | date | DATETIME |
| datetime, timestamp | DateTime | java.sql.Date | datetime | TIMESTAMP | DATETIME | TIMESTAMP | datetime | DATETIME |
| time, timespan | TimeSpan | java.sql.Time | time | TIME | TIME | TIMESTAMP | datetime | DATETIME |
| string, varchar | String | java.lang.String | If length > 4000: nvarchar(max), Otherwise: nvarchar(length) | If length > 32672: LONG VARCHAR, Otherwise VARCHAR(length) | If length > 255: LONGTEXT, Otherwise: VARCHAR(length) | If length > 4000: CLOB, Otherwise: VARCHAR2(length) | nvarchar(length) | If length > 255: LONGTEXT, Otherwise: VARCHAR(length) |
| long, int64, bigint | Int64 | long | bigint | BIGINT | BIGINT | NUMBER | bigint | LONG |
| boolean, bool | Boolean | boolean | tinyint | SMALLINT | BIT | NUMBER | tinyint | BIT |
| decimal, numeric | Decimal | java.math.BigDecimal | decimal | DECIMAL | DECIMAL | DECIMAL | decimal | CURRENCY |
| uuid | Guid | java.util.UUID | nvarchar(length) | VARCHAR(length) | VARCHAR(length) | VARCHAR2(length) | nvarchar(length) | VARCHAR(length) |
| binary, varbinary, longvarbinary | byte[] | byte[] | binary(1000) or varbinary(max) after SQL Server 2000, image otherwise | BLOB | LONGBLOB | BLOB | BLOB | LONGBINARY |