If your are writing a Transformer (or any other component) you can get
hold of a dataSource instance .
datasource =Context#getDataSource(name).
//then you can invoke
datasource.getData("update mytable ....");
//though the name is getData() it can execute update commands also
ensure that you do a
datasource.close();
after you are done
On Tue, Aug 4, 2009 at 9:40 AM, Avlesh Singh<avl...@gmail.com> wrote:
> Couple of things -
>
> 1. Your dataSource is probably in readOnly mode. It is possible to fire
> updates, by specifying readOnly="false" in your dataSource.
> 2. What you are trying achieve, is typically done using a "select for
> update". For MySql, here's the documentation -
> http://dev.mysql.com/doc/refman/5.0/en/innodb-locking-reads.html
> 3. You don't need to create a separate "entity" for firing updates.
> Writing a database procedure might be a good idea. In that case your query
> will simply be <entity name="mainEntity" query="call MyProcedure();" .../>.
> All the heavy lifting can be done by this query.
>
> Moreover, update queries, only return the number of rows affected and not a
> resultSet. DIH expects one and hence the exception.
>
> Cheers
> Avlesh
>
> On Tue, Aug 4, 2009 at 1:49 AM, Jay Hill <jayallenh...@gmail.com> wrote:
>
>> Is it possible for the DataImportHandler to update records in the table it
>> is querying? For example, say I have a query like this in my entity:
>>
>> query="select field1, field2, from someTable where hasBeenIndexed=false"
>>
>> Is there a way I can mark each record processed by updating the
>> hasBeenIndexed field? Here's a config I tried:
>>
>> <?xml version="1.0"?>
>> <dataConfig>
>> <dataSource
>> type="JdbcDataSource"
>> driver="com.mysql.jdbc.Driver"
>> url="jdbc:mysql://localhost:3306/solrhacks"
>> user="user"
>> password="pass"/>
>>
>> <document name="testingDIHupdate">
>> <entity name="mainEntity"
>> pk="id"
>> query="select id, name from tableToIndex where
>> hasBeenIndexed=0">
>> <field column="id" template="dihTestUpdate-${main.id}"/>
>> <field column="name" name="name"/>
>>
>> <entity name="updateEntity"
>> pk="id"
>> query="update tableToIndex set hasBeenIndexed=1 where
>> id=${mainEntity.id}">
>> </entity>
>> </entity>
>> </document>
>> </dataConfig>
>>
>> It does update the first record, but then an Exception is thrown:
>> Aug 3, 2009 1:15:24 PM org.apache.solr.handler.dataimport.DocBuilder
>> buildDocument
>> SEVERE: Exception while processing: mainEntity document :
>> SolrInputDocument[{id=id(1.0)={1}, name=name(1.0)={John Jones}}]
>> org.apache.solr.handler.dataimport.DataImportHandlerException: Unable to
>> execute query: update tableToIndex set hasBeenIndexed=1 where id=1
>> Processing Document # 1
>> at
>>
>> org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:250)
>> at
>>
>> org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:207)
>> at
>>
>> org.apache.solr.handler.dataimport.JdbcDataSource.getData(JdbcDataSource.java:40)
>> at
>>
>> org.apache.solr.handler.dataimport.SqlEntityProcessor.initQuery(SqlEntityProcessor.java:58)
>> at
>>
>> org.apache.solr.handler.dataimport.SqlEntityProcessor.nextRow(SqlEntityProcessor.java:71)
>> at
>>
>> org.apache.solr.handler.dataimport.EntityProcessorWrapper.nextRow(EntityProcessorWrapper.java:237)
>> at
>>
>> org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:344)
>> at
>>
>> org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:370)
>> at
>>
>> org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:225)
>> at
>> org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:167)
>> at
>>
>> org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:333)
>> at
>>
>> org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:393)
>> at
>>
>> org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:372)
>> Caused by: java.lang.NullPointerException
>> at
>>
>> org.apache.solr.handler.dataimport.JdbcDataSource$ResultSetIterator.<init>(JdbcDataSource.java:248)
>> ... 12 more
>>
>>
>> -Jay
>>
>
--
-----------------------------------------------------
Noble Paul | Principal Engineer| AOL | http://aol.com
