| <html><head> |
| <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> |
| <title>11. Default Schema</title><link rel="stylesheet" href="css/docbook.css" type="text/css"><base href="display"><meta name="generator" content="DocBook XSL Stylesheets V1.72.0"><link rel="start" href="manual.html" title="Apache OpenJPA 2.0 User's Guide"><link rel="up" href="ref_guide_dbsetup.html" title="Chapter 4. JDBC"><link rel="prev" href="ref_guide_dbsetup_lrs.html" title="10. Large Result Sets"><link rel="next" href="ref_guide_schema_info.html" title="12. Schema Reflection"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">11. |
| Default Schema |
| </th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ref_guide_dbsetup_lrs.html">Prev</a> </td><th width="60%" align="center">Chapter 4. |
| JDBC |
| </th><td width="20%" align="right"> <a accesskey="n" href="ref_guide_schema_info.html">Next</a></td></tr></table><hr></div><div class="section" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="ref_guide_schema_def"></a>11. |
| Default Schema |
| </h2></div></div></div><a class="indexterm" name="d0e24185"></a><p> |
| It is common to duplicate a database model in multiple schemas. You may have one |
| schema for development and another for production, or different database users |
| may access different schemas. OpenJPA facilitates these patterns with the |
| <a href="ref_guide_conf_jdbc.html#openjpa.jdbc.Schema" title="6.12. openjpa.jdbc.Schema"><code class="literal">openjpa.jdbc.Schema</code> |
| </a> configuration property. This property establishes a default schema for |
| any unqualified table names, allowing you to leave schema names out of your |
| mapping definitions. |
| </p><p> |
| The <code class="literal">Schema</code> property also establishes the default schema for |
| new tables created through OpenJPA tools, such as the mapping tool covered in |
| <a href="ref_guide_mapping.html#ref_guide_mapping_mappingtool" title="1. Forward Mapping">Section 1, “ |
| Forward Mapping |
| ”</a>. |
| </p><p> |
| If the entities are mapped to the same table name but with different schema |
| name within one <code class="literal">PersistenceUnit</code> intentionally, and the |
| strategy of <code class="literal">GeneratedType.AUTO</code> is used to generate the ID |
| for each entity, a schema name for each entity must be explicitly declared |
| either through the annotation or the mapping.xml file. Otherwise, the mapping |
| tool only creates the tables for those entities with the schema names under |
| each schema. In addition, there will be only one |
| <code class="literal">OPENJPA_SEQUENCE_TABLE</code> created for all the entities within |
| the <code class="literal">PersistenceUnit</code> if the entities are not identified |
| with the schema name. |
| Read <a href="ref_guide_sequence.html" title="6. Generators">Section 6, “ |
| Generators |
| ”</a> in the Reference Guide. |
| </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ref_guide_dbsetup_lrs.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ref_guide_dbsetup.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ref_guide_schema_info.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">10. |
| Large Result Sets |
| </td><td width="20%" align="center"><a accesskey="h" href="manual.html">Home</a></td><td width="40%" align="right" valign="top"> 12. |
| Schema Reflection |
| </td></tr></table></div></body></html> |
