This example demonstrates the use of multi-column or composite repository IDs.
<item-descriptor name="typeX" id-separator=":"> <table name="TYPEX" type="primary" id-column-names="TYPEX_ID"> <property name="id" column-names="TYPEX_ID" data-type="string" /> <property name="name" column-names="NAME" data-type="string" /> </table> <table name="TYPEXY" type="multi" id-column-names="TYPEX_ID"> <property name="typeXYs" component-item-type="typeXY" column-names="TYPEX_ID,TYPEY_ID" data-type="set" /> </table> </item-descriptor> <item-descriptor name="typeY" id-separator=":"> <table name="TYPEY" type="primary" id-column-names="TYPEY_ID"> <property name="id" column-names="TYPEY_ID" data-type="string" /> <property name="name" column-names="NAME" data-type="string" /> </table> </item-descriptor> <item-descriptor name="typeZ" id-separator=":"> <table name="TYPEZ" type="primary" id-column-names="TYPEZ_ID"> <property name="id" column-names="TYPEZ_ID" data-type="string" /> <property name="name" column-names="NAME" data-type="string" /> </table> </item-descriptor> <item-descriptor name="typeXY" id-separator=":"> <table name="TYPEXY" type="primary" id-column-names="TYPEX_ID,TYPEY_ID"> <property name="id" column-names="TYPEX_ID,TYPEY_ID" data-types="string,string" /> <property name="name" column-names="NAME" data-type="string" /> <property name="x" column-names="TYPEX_ID" item-type="typeX" /> <property name="y" column-names="TYPEY_ID" item-type="typeY" /> </table> <table name="TYPEXYZ" type="multi" id-column-names="TYPEX_ID,TYPEY_ID"> <property name="typeXYZs" component-item-type="typeXYZ" column-names="TYPEX_ID,TYPEY_ID,TYPEZ_ID" data-type="set" /> </table> </item-descriptor> <item-descriptor name="typeXYZ" id-separator=":"> <table name="TYPEXYZ" type="primary" id-column-names="TYPEX_ID,TYPEY_ID,TYPEZ_ID"> <property name="id" column-names="TYPEX_ID,TYPEY_ID,TYPEZ_ID" data-types="string,string,string" /> <property name="name" column-names="NAME" data-type="string" /> <property name="x" column-names="TYPEX_ID" item-type="typeX" /> <property name="y" column-names="TYPEY_ID" item-type="typeY" /> <property name="z" column-names="TYPEZ_ID" item-type="typeZ" /> <property name="xy" column-names="TYPEX_ID,TYPEY_ID" item-type="typeXY" /> </table> </item-descriptor>
SQL Statements
drop table TYPEXYZ; drop table TYPEXY; drop table TYPEZ; drop table TYPEY; drop table TYPEX; CREATE TABLE TYPEX ( TYPEX_ID VARCHAR(32) not null, NAME VARCHAR(32) null, primary key(TYPEX_ID) ); CREATE TABLE TYPEY ( TYPEY_ID VARCHAR(32) not null, NAME VARCHAR(32) null, primary key(TYPEY_ID) ); CREATE TABLE TYPEZ ( TYPEZ_ID VARCHAR(32) not null, NAME VARCHAR(32) null, primary key(TYPEZ_ID) ); CREATE TABLE TYPEXY ( TYPEX_ID VARCHAR(32) not null, TYPEY_ID VARCHAR(32) not null, NAME VARCHAR(32) null, primary key(TYPEX_ID, TYPEY_ID), foreign key (TYPEX_ID) references TYPEX(TYPEX_ID), foreign key (TYPEY_ID) references TYPEY(TYPEY_ID) ); CREATE TABLE TYPEXYZ( TYPEX_ID VARCHAR(32) not null, TYPEY_ID VARCHAR(32) not null, TYPEZ_ID VARCHAR(32) not null, NAME VARCHAR(32) null, primary key(TYPEX_ID, TYPEY_ID,TYPEZ_ID), foreign key (TYPEX_ID) references TYPEX(TYPEX_ID), foreign key (TYPEY_ID) references TYPEY(TYPEY_ID), foreign key (TYPEZ_ID) references TYPEZ(TYPEZ_ID) );