Timestamp compatibility while performing delta import in solr

问题

Im new to solr.I have successfully indexed oracle 10g xe database. Im trying to perform delta import on the same. The delta query requires a comparison of last_modified column of the table with ${dih.last_index_time}. However in my application I do not have such a column . Also, i cannot add this column. Therefore i used 'scn_to_timestamp(ora_rowscn)' to give the value of the required timestamps. This query returns the value of type timestamp in the following format 24-JUL-13 12.42.32.000000000 PM and dih.last_index_time is in the format 2013-07-24 12:18:03. So, I changed the format of dih.last_index_time as to_timestamp('${dih.last_index_time}', 'YYYY/MM/DD HH:MI:SS').

My Data-config looks like this -

<dataConfig>
<dataSource type="JdbcDataSource" driver="oracle.jdbc.OracleDriver" url="jdbc:oracle:thin:@XXX.XXX.XX.XX:XXXX:xe" user="XXXXXXXX" password="XXXXXXX" /> 
<document name="product_info">
<entity name="PRODUCT" pk="PID" query="SELECT * FROM PRODUCT" deltaImportQuery="SELECT * FROM PRODUCT WHERE PID=${dih.delta.id}" deltaQuery="SELECT PID FROM PRODUCT WHERE scn_to_timestamp(ora_rowscn) > to_timestamp('${dih.last_index_time}', 'YYYY/MM/DD HH:MI:SS')">
  <field column="PID" name="id" /> 
  <field column="PNAME" name="itemName" /> 
  <field column="INITQTY" name="itemQuantity" />
  <field column="REMQTY" name="remQuantity" />
  <field column="PRICE" name="itemPrice" /> 
  <field column="SPECIFICATION" name="specifications" /> 
  <entity name="SUB_CATEGORY" query="SELECT * FROM SUB_CATEGORY WHERE SCID=${PRODUCT.SCID}">
    <field column="SUBCATNAME" name="brand" /> 
    <entity name="CATEGORY" query="SELECT CNAME FROM CATEGORY WHERE CID=${SUB_CATEGORY.CID}">
      <field column="CNAME" name="itemCategory" /> 
    </entity>
  </entity>
</entity>
</document>
</dataConfig>

However,This is not working and im getting the following error -

Unable to execute query: SELECT * FROM PRODUCT WHERE PID= Processing Document # 1
Caused by: java.sql.SQLException: ORA-00936: missing expression

Please help me out!!!

回答1:

I had a similar issue and had more success with *to_date*. But looking at this again, it just looks like perhaps you just need to quote your delta id in the delatImportQuery:

deltaImportQuery="SELECT * FROM PRODUCT WHERE PID='${dih.delta.id}'"

来源：https://stackoverflow.com/questions/17830323/timestamp-compatibility-while-performing-delta-import-in-solr

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