如果希望同时对多个表进行全文检索,那我们该如何处理呢?利用DIH导入数据并建立索引时。schema.xml中配置了uniqueKey为id
<uniqueKey>id</uniqueKey>
如果多表主键都为id的话索引会被覆盖
<!--deltaImportQuery和deltaQuery为增量导入时使用。--> <entity name="case" pk="id" query="SELECT id,title, summary, 'case' as type FROM case" deltaImportQuery="SELECT id, title, summary, 'case' as type from case WHERE id='${dih.delta.id}'" deltaQuery="SELECT id, title, summary, 'case' as type FROM case WHERE create_time > '${dih.last_index_time}'" > <!--field用于配置schema.xml中field和数据库字段的对应关系。column:数据库中字段名称,name:schema.xml中配置的名称--> <field column="id" name="id"/> <field column="title" name="title"/> <field column="summary" name="summary"/> </entity> <!--deltaImportQuery和deltaQuery为增量导入时使用。--> <entity name="casetest" pk="id" query="SELECT id,title, summary, 'case_test' as type FROM casetest" deltaImportQuery="SELECT id, title, summary, 'case_test' as type from casetest WHERE id='${dih.delta.id}'" deltaQuery="SELECT id, title, summary, 'case_test' as type FROM casetest WHERE create_time > '${dih.last_index_time}'" > <!--field用于配置schema.xml中field和数据库字段的对应关系。column:数据库中字段名称,name:schema.xml中配置的名称--> <field column="id" name="id"/> <field column="title" name="title"/> <field column="summary" name="summary"/> <field column="type" name="type"/> </entity>
由于id是唯一键,如果id重复索引会被覆盖掉。此时可以加个简易的标识,以便构造不同表的uniqueKey
修改后配置文件
<!--deltaImportQuery和deltaQuery为增量导入时使用。--> <entity name="case" pk="id" query="SELECT concat('case_Type_', id) as id,title, summary, 'case' as type FROM case" deltaImportQuery="SELECT concat('case_Type_', id) as id, title, summary, 'case' as type from case WHERE id='${dih.delta.id}'" deltaQuery="SELECT concat('case_Type_', id) as id, title, summary, 'case' as type FROM case WHERE create_time > '${dih.last_index_time}'" > <!--field用于配置schema.xml中field和数据库字段的对应关系。column:数据库中字段名称,name:schema.xml中配置的名称--> <field column="id" name="id"/> <field column="title" name="title"/> <field column="summary" name="summary"/> </entity> <!--deltaImportQuery和deltaQuery为增量导入时使用。--> <entity name="casetest" pk="id" query="SELECT concat('case_test_Type_', id) as id,title, summary, 'case_test' as type FROM casetest" deltaImportQuery="SELECT concat('case_test_Type_', id) as id, title, summary, 'case_test' as type from casetest WHERE id='${dih.delta.id}'" deltaQuery="SELECT concat('case_test_Type_', id) as id, title, summary, 'case_test' as type FROM casetest WHERE create_time > '${dih.last_index_time}'" > <!--field用于配置schema.xml中field和数据库字段的对应关系。column:数据库中字段名称,name:schema.xml中配置的名称--> <field column="id" name="id"/> <field column="title" name="title"/> <field column="summary" name="summary"/> <field column="type" name="type"/> </entity>