如果希望同時對多個表進行全文檢索，那我們該如何處理呢？利用dih匯入資料並建立索引時。schema.xml中配置了uniquekey為id
<uniquekey
>id
uniquekey
>
如果多表主鍵都為id的話索引會被覆蓋
<
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='$'"
deltaquery
="select id, title, summary, 'case' as type from case where create_time > '$'"
>
<
field
column
="id"
name
="id"
/>
<
field
column
="title"
name
="title"
/>
<
field
column
="summary"
name
="summary"
/>
entity
>
<
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='$'"
deltaquery
="select id, title, summary, 'case_test' as type from casetest where create_time > '$'"
>
<
field
column
="id"
name
="id"
/>
<
field
column
="title"
name
="title"
/>
<
field
column
="summary"
name
="summary"
/>
<
field
column
="type"
name
="type"
/>
entity
>
由於id是唯一鍵，如果id重複索引會被覆蓋掉。此時可以加個簡易的標識，以便構造不同表的uniquekey
修改後配置檔案
<
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='$'"
deltaquery
="select concat('case_type_', id) as id, title, summary, 'case' as type from case where create_time > '$'"
>
<
field
column
="id"
name
="id"
/>
<
field
column
="title"
name
="title"
/>
<
field
column
="summary"
name
="summary"
/>
entity
>
<
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='$'"
deltaquery
="select concat('case_test_type_', id) as id, title, summary, 'case_test' as type from casetest where create_time > '$'"
>
<
field
column
="id"
name
="id"
/>
<
field
column
="title"
name
="title"
/>
<
field
column
="summary"
name
="summary"
/>
<
field
column
="type"
name
="type"
/>
entity
>
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