SQL data types returned in rowsets are converted to Java specification data types according to the table of JDBC Types Mapped to Java Types in Appendix B of the JDBC 3.0 Specification (copied below). For more information, see JDBC 3.0 - Final Release.
A-Z, a-z, 0-9 and _, then you must quote the identifier.
| JDBC Type | Java Type |
|---|---|
| CHAR | java.lang.String |
| VARCHAR | java.lang.String |
| LONGVARCHAR | java.lang.String |
| NUMERIC | java.math.BigDecimal |
| DECIMAL | java.math.BigDecimal |
| BIT | boolean |
| BOOLEAN | boolean |
| TINYINT | byte |
| SMALLINT | short |
| INTEGER | int |
| BIGINT | long |
| REAL | float |
| FLOAT | double |
| DOUBLE | double |
| BINARY | byte[ ] |
| VARBINARY | byte[ ] |
| LONGVARBINARY | byte[ ] |
| DATE | java.sql.Date |
| TIME | java.sql.Time |
| TIMESTAMP | java.sql .Timestamp |
| CLOB | java.sql.Clob |
| BLOB | java.sql.Blob |
| ARRAY | java.sql.Array |
| DISTINCT | (mapping of underlying type) |
| STRUCT | java.sql.Struct |
| REF | java.sql.Ref |
| DATALINK | java.net.URL |
| JAVA_OBJECT | (underlying Java class) |
DatabaseMetadata.getExtraNameCharacters().