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## DB 2 The DdlUtils support for IBM DB2 is based upon version 7. The datatypes and SQL elements in DB2 are described in the DB2 SQL Reference V7. Some specifics related to the JDBC driver and suggested typemappings can also be found here. DdlUtils provides two platforms for DB2, one for version 7 and one for version 8 and above, which mainly differ in the maximum identifier lengths (see below for details.) Note that you have to specify the v8 platform manually as the auto detection currently always selects the v7 platform. Platform identifiers: DB2 for the v7 platform DB2v8 for the v8 platform Recognized JDBC drivers: com.ibm.db2.jcc.DB2Driver COM.ibm.db2.jdbc.app.DB2Driver COM.ibm.db2os390.sqlj.jdbc.DB2SQLJDriver com.ibm.as400.access.AS400JDBCDriver Recognized JDBC sub protocols: jdbc:db2 jdbc:db2os390 jdbc:2os390sqlj jdbc:as400
The database supports SQL comments | yes
The database supports delimited identifiers | yes
The database's maximum identifier length | 18 for the v7 platform The v8 platform supports 128 characters for identifiers (e.g. table names), 30 characters for column names, and 18 for constraints and foreign keys
The database supports default values for LONG types | yes
DdlUtils uses sequences for identity columns | no
The database supports non-primary key columns as identity columns | yes
The database allows INSERT/UPDATE statements to set values for identity columns | yes
DdlUtils can read back the auto-generated value of an identity column | yes
The database supports non-unique indices | yes
DdlUtils can create a database via JDBC | no
DdlUtils can drop a database via JDBC | no
JDBC Type | Database Type | Additional comments
--- | --- | ---
ARRAY | BLOB | Will be read back as BLOB
BIGINT | BIGINT |
BINARY | CHAR(n) FOR BIT DATA |
BIT | SMALLINT | DB2 has no native boolean type Will be read back as SMALLINT
BLOB | BLOB |
BOOLEAN | SMALLINT | DB2 has no native boolean type Will be read back as SMALLINT
CHAR | CHAR |
CLOB | CLOB |
DATALINK | DATALINK |
DATE | DATE |
DECIMAL | DECIMAL |
DISTINCT | DISTINCT |
DOUBLE | DOUBLE |
FLOAT | DOUBLE |
INTEGER | INTEGER |
JAVA_OBJECT | BLOB | Will be read back as BLOB
LONGVARBINARY | LONG VARCHAR FOR BIT DATA |
LONGVARCHAR | LONG VARCHAR |
NULL | LONG VARCHAR FOR BIT DATA | Will be read back as LONGVARBINARY
NUMERIC | DECIMAL | Will be read back as DECIMAL
OTHER | BLOB | Will be read back as BLOB
REAL | REAL |
REF | REF |
SMALLINT | SMALLINT |
STRUCT | BLOB | Will be read back as BLOB
TIME | TIME |
TIMESTAMP | TIMESTAMP |
TINYINT | SMALLINT | Will be read back as SMALLINT
VARBINARY | VARCHAR(n) FOR BIT DATA |
VARCHAR | VARCHAR |