DeltaImport not happening by default - sql

Question

I'm having issues with deltaquery where it's doesn't work automatically. Below is the data-config I have
<dataConfig>
<dataSource type="JdbcDataSource"
driver="com.microsoft.sqlserver.jdbc.SQLServerDriver"
url="jdbc:sqlserver://WTL-sql-1.com;databaseName=eng_metrics"
user="metrics"
password="metrics"/>
<document name="content">
<entity name="id"
query="select defect_id,headline,description,modify_date,issue_type,category,product,state FROM defects WHERE state not like 'Duplicate'"
deltaImportQuery="select defect_id,headline,description,modify_date,issue_type,category,product,state FROM defects WHERE defect_id = '${dataimporter.delta.defect_id}' and state not like 'Duplicate'"
deltaQuery="select defect_id FROM defects WHERE modify_date > '${dataimporter.last_index_time}'">
<field column="defect_id" name="defect_id" />
<field column="headline" name="headline" />
<field column="description" name="description" />
<field column="modify_date" name="modify_date" />
<field column="issue_type" name="issue_type" />
<field column="category" name="category" />
<field column="product" name="product" />
<field column="state" name="state" />
</entity>
</document>
</dataConfig>
But what I see that no matter the modify_date changes in the DB, I don't see any update happening unless I try doing a delta import explicitly.
Can someone provide me some thoughts on whether I need to change some config or some query to make that happen automatically?

Answer 1

Actually, DataImportHandler will not do it automatically. You have to trigger it by call delta import 's url.
You may want something like this:
http://wiki.apache.org/solr/DataImportHandler#Scheduling
or you can implement similar one by youself.

Answer 2

But I've this data-config which works fine in some cases
<dataConfig>
<dataSource type="JdbcDataSource"
driver="com.microsoft.sqlserver.jdbc.SQLServerDriver"
url="jdbc:sqlserver://127.0.0.1\SQLEXPRESS;databaseName=sustaining_trends"
user="sa"
password="metrics"/>
<document name="content">
<entity name="id"
query="select id,createtime,lastmodified,modifiedby,title,keywords,general,symptom,diagnosis,resolution FROM trends"
deltaImportQuery="select id,createtime,lastmodified,modifiedby,title,keywords,general,symptom,diagnosis,resolution FROM trends WHERE id = ${dataimporter.delta.id}"
deltaQuery="select id FROM trends WHERE lastmodified > '${dataimporter.last_index_time}' or createtime > '${dataimporter.last_index_time}'">
<field column="id" name="trendid" />
<field column="lastmodified" name="lastmodified" />
<field column="modifiedby" name="modifiedby" />
<field column="title" name="title" />
<field column="keywords" name="keywords" />
<field column="general" name="general" />
<field column="symptom" name="symptom" />
<field column="diagnosis" name="diagnosis" />
<field column="resolution" name="resolution" />
</entity>
</document>
</dataConfig>
Here if the item is modified immediately that gets updated without any interference but if a new data is created that doesn't get updated until either I do a manual delta import or else some entry gets modified.
How does this work automatically incase of modification and not work automatically for creation?