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From "Bryan Pendleton (JIRA)" <derby-...@db.apache.org>
Subject [jira] Commented: (DERBY-1292) ClassCastException in ClientDriver when using CLOB columns and batch updates
Date Sat, 06 May 2006 15:41:22 GMT
    [ http://issues.apache.org/jira/browse/DERBY-1292?page=comments#action_12378226 ] 

Bryan Pendleton commented on DERBY-1292:
----------------------------------------

The use of a collection of type information with an entry for each batch element
appears to be the solution chosen by the embedded driver. Here is a comment
from the addBatch() method in EmbedPreparedStatement.java:

   //get a clone of the parameterValueSet and save it in the vector
   //which will be used later on at the time of batch execution.
   //This way we will get a copy of the current statement's parameter
   //values rather than a pointer to the statement's parameter value
   //set which will change with every new statement in the batch.

So this feels like the correct solution to pursue in the client.


> ClassCastException in ClientDriver when using CLOB columns and batch updates
> ----------------------------------------------------------------------------
>
>          Key: DERBY-1292
>          URL: http://issues.apache.org/jira/browse/DERBY-1292
>      Project: Derby
>         Type: Bug

>     Versions: 10.1.2.1
>     Reporter: Gerald Khin
>     Assignee: Bryan Pendleton

>
> java.lang.ClassCastException: java.lang.String
> 	at org.apache.derby.client.net.NetStatementRequest.computeProtocolTypesAndLengths(Unknown
Source)
> 	at org.apache.derby.client.net.NetStatementRequest.buildSQLDTAcommandData(Unknown Source)
> 	at org.apache.derby.client.net.NetStatementRequest.writeExecute(Unknown Source)
> 	at org.apache.derby.client.net.NetPreparedStatement.writeExecute_(Unknown Source)
> 	at org.apache.derby.client.am.PreparedStatement.writeExecute(Unknown Source)
> 	at org.apache.derby.client.am.PreparedStatement.executeBatchRequestX(Unknown Source)
> 	at org.apache.derby.client.am.PreparedStatement.executeBatchX(Unknown Source)
> 	at org.apache.derby.client.am.PreparedStatement.executeBatch(Unknown Source)
> 	at CCEBatchUpdateRepro.doInserts(CCEBatchUpdateRepro.java:71)
> 	at CCEBatchUpdateRepro.main(CCEBatchUpdateRepro.java:27)

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