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| <!DOCTYPE document PUBLIC "-//APACHE//DTD Documentation V2.0//EN" "http://forrest.apache.org/dtd/document-v20.dtd">
|
| <document>
|
| <header>
|
| <title>DB 2</title> |
| </header>
|
| <body>
|
| <p>
|
| The DdlUtils support for <a href="ext:db2">IBM DB2</a> is based upon version <strong>7</strong>.
|
| The datatypes and SQL elements in DB2 are described in the
|
| <a href="ext:db2/manual">DB2 SQL Reference V7</a>. Some specifics related to the JDBC driver and
|
| suggested typemappings can also be found <a href="ext:db2/jdbc-mappings">here</a>.
|
| </p> |
| <p> |
| 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. |
| </p>
|
| <p> </p> |
| <p> |
| Platform identifiers: |
| </p> |
| <ul> |
| <li><code>DB2</code> for the v7 platform</li> |
| <li><code>DB2v8</code> for the v8 platform</li> |
| </ul> |
| <p> </p> |
| <p> |
| Recognized JDBC drivers: |
| </p> |
| <ul> |
| <li><code>com.ibm.db2.jcc.DB2Driver</code></li> |
| <li><code>COM.ibm.db2.jdbc.app.DB2Driver</code></li> |
| <li><code>COM.ibm.db2os390.sqlj.jdbc.DB2SQLJDriver</code></li> |
| <li><code>com.ibm.as400.access.AS400JDBCDriver</code></li> |
| </ul> |
| <p> </p> |
| <p> |
| Recognized JDBC sub protocols: |
| </p> |
| <ul> |
| <li><code>jdbc:db2</code></li> |
| <li><code>jdbc:db2os390</code></li> |
| <li><code>jdbc:2os390sqlj</code></li> |
| <li><code>jdbc:as400</code></li> |
| </ul> |
| <p> </p>
|
| <table>
|
| <tr> |
| <td class="platformPropName">The database supports SQL comments</td> |
| <td class="platformPropValue">yes</td> |
| </tr> |
| <tr> |
| <td class="platformPropName">The database supports delimited identifiers</td> |
| <td class="platformPropValue">yes</td> |
| </tr> |
| <tr> |
| <td class="platformPropName">The database's maximum identifier length</td> |
| <td class="platformPropValue">18 for the v7 platform<br/>The v8 platform supports 128 characters |
| for identifiers (e.g. table names), 30 characters for column names, |
| and 18 for constraints and foreign keys</td> |
| </tr> |
| <tr>
|
| <td class="platformPropName">The database supports default values for <code>LONG</code> types</td>
|
| <td class="platformPropValue">yes</td>
|
| </tr>
|
| <tr> |
| <td class="platformPropName">DdlUtils uses sequences for identity columns</td> |
| <td class="platformPropValue">no</td> |
| </tr> |
| <tr>
|
| <td class="platformPropName">The database supports non-primary key columns as identity columns</td>
|
| <td class="platformPropValue">yes</td>
|
| </tr>
|
| <tr> |
| <td class="platformPropName">The database allows INSERT/UPDATE statements to set values for identity columns</td> |
| <td class="platformPropValue">yes</td> |
| </tr> |
| <tr> |
| <td class="platformPropName">DdlUtils can read back the auto-generated value of an identity column</td> |
| <td class="platformPropValue">yes</td> |
| </tr> |
| <tr> |
| <td class="platformPropName">The database supports non-unique indices</td> |
| <td class="platformPropValue">yes</td> |
| </tr> |
| <tr> |
| <td class="platformPropName">DdlUtils can create a database via JDBC</td> |
| <td class="platformPropValue">no</td> |
| </tr> |
| <tr> |
| <td class="platformPropName">DdlUtils can drop a database via JDBC</td> |
| <td class="platformPropValue">no</td> |
| </tr> |
| </table>
|
| <p> </p>
|
| <table>
|
| <tr>
|
| <th class="typeMappingJdbcType">JDBC Type</th>
|
| <th class="typeMappingNativeType">Database Type</th>
|
| <th class="typeMappingComments">Additional comments</th>
|
| </tr>
|
| <tr>
|
| <td>ARRAY</td>
|
| <td>BLOB</td>
|
| <td>Will be read back as BLOB</td>
|
| </tr>
|
| <tr>
|
| <td>BIGINT</td>
|
| <td>BIGINT</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>BINARY</td>
|
| <td>CHAR(n) FOR BIT DATA</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>BIT</td>
|
| <td>SMALLINT</td>
|
| <td>DB2 has no native boolean type<br/> |
| Will be read back as SMALLINT</td>
|
| </tr>
|
| <tr>
|
| <td>BLOB</td>
|
| <td>BLOB</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>BOOLEAN</td>
|
| <td>SMALLINT</td>
|
| <td>DB2 has no native boolean type<br/> |
| Will be read back as SMALLINT</td>
|
| </tr>
|
| <tr>
|
| <td>CHAR</td>
|
| <td>CHAR</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>CLOB</td>
|
| <td>CLOB</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>DATALINK</td>
|
| <td>DATALINK</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>DATE</td>
|
| <td>DATE</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>DECIMAL</td>
|
| <td>DECIMAL</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>DISTINCT</td>
|
| <td>DISTINCT</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>DOUBLE</td>
|
| <td>DOUBLE</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>FLOAT</td>
|
| <td>DOUBLE</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>INTEGER</td>
|
| <td>INTEGER</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>JAVA_OBJECT</td>
|
| <td>BLOB</td>
|
| <td>Will be read back as BLOB</td>
|
| </tr>
|
| <tr>
|
| <td>LONGVARBINARY</td>
|
| <td>LONG VARCHAR FOR BIT DATA</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>LONGVARCHAR</td>
|
| <td>LONG VARCHAR</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>NULL</td>
|
| <td>LONG VARCHAR FOR BIT DATA</td>
|
| <td>Will be read back as LONGVARBINARY</td>
|
| </tr>
|
| <tr>
|
| <td>NUMERIC</td>
|
| <td>DECIMAL</td>
|
| <td>Will be read back as DECIMAL</td>
|
| </tr>
|
| <tr>
|
| <td>OTHER</td>
|
| <td>BLOB</td>
|
| <td>Will be read back as BLOB</td>
|
| </tr>
|
| <tr>
|
| <td>REAL</td>
|
| <td>REAL</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>REF</td>
|
| <td>REF</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>SMALLINT</td>
|
| <td>SMALLINT</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>STRUCT</td>
|
| <td>BLOB</td>
|
| <td>Will be read back as BLOB</td>
|
| </tr>
|
| <tr>
|
| <td>TIME</td>
|
| <td>TIME</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>TIMESTAMP</td>
|
| <td>TIMESTAMP</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>TINYINT</td>
|
| <td>SMALLINT</td>
|
| <td>Will be read back as SMALLINT</td>
|
| </tr>
|
| <tr>
|
| <td>VARBINARY</td>
|
| <td>VARCHAR(n) FOR BIT DATA</td>
|
| <td></td>
|
| </tr>
|
| <tr>
|
| <td>VARCHAR</td>
|
| <td>VARCHAR</td>
|
| <td></td>
|
| </tr>
|
| </table>
|
| </body>
|
| </document>
|
