Hi Kristian, Looking at the jira: https://issues.apache.org/jira/browse/DERBY-4278 https://issues.apache.org/jira/browse/DERBY-4278 seems like you have fixed the issue.
Previously I downloaded Derby 10.5.1.1 What would be the best way to get this fix? Should I do a check out from the Development Trunk? thanks Kashyup Kristian Waagan-4 wrote: > > kashyup wrote: >> Hello all, >> We have just started to look into Derby as our embedded DB for a desktop >> app >> version. >> >> Env: Hibernate 3.2 and Derby 10.5.1 >> >> I have defined a java string field of type 'text' in Hibernate Mapping >> (works great on Postgres 8.1 and Oracle 10g) >> >> I use Hibernate SessionFactory to generate Table schema, which is done >> without any error. >> >> But, when I try to save records in tables via Hibernate Session, I get >> the >> following exception: >> Note: If I change hibernate mapping to type 'string', then I dont get >> this >> error: >> >> java.lang.IllegalStateException: No context, unable to determine which >> stream header format to generate >> at >> org.apache.derby.iapi.types.ClobStreamHeaderGenerator.determineMode(Unknown >> Source) >> at >> org.apache.derby.iapi.types.ClobStreamHeaderGenerator.expectsCharCount(Unknown >> Source) >> at org.apache.derby.iapi.types.ReaderToUTF8Stream.fillBuffer(Unknown >> Source) >> at org.apache.derby.iapi.types.ReaderToUTF8Stream.read(Unknown Source) >> at java.io.DataInputStream.read(Unknown Source) >> at org.apache.derby.iapi.types.SQLClob.readExternal(Unknown Source) >> at org.apache.derby.iapi.types.SQLChar.getString(Unknown Source) >> at org.apache.derby.iapi.types.SQLClob.getClone(Unknown Source) >> at org.apache.derby.impl.sql.GenericParameter.getClone(Unknown Source) >> at org.apache.derby.impl.sql.GenericParameterValueSet.<init>(Unknown >> Source) >> at org.apache.derby.impl.sql.GenericParameterValueSet.getClone(Unknown >> Source) >> at org.apache.derby.impl.jdbc.EmbedPreparedStatement.addBatch(Unknown >> Source) >> at >> org.hibernate.jdbc.BatchingBatcher.addToBatch(BatchingBatcher.java:31) >> at >> org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2252) >> at >> org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2665) >> >> Also, I need to save it as type 'text' even though it gets saved as >> CLOB(255), as the CLOB column size can later be altered. >> >> What could be the cause? or changes needed? >> > Hello, > > You have discovered / triggered a bug in the new Clob handling code > introduced in 10.5.1. > I logged DERBY-4278 [1], and have started working on a fix (the > regression tests are running, patch needs review). > > Regarding workarounds, I'm afraid all I can think of is using the client > driver instead of the embedded driver, avoid batching for inserts with > Clobs, change the data type, or downgrade to 10.4. Another option is to > build Derby with the patch and test it out :) > I observe that you are using very small Clobs (255 characters). Clobs > are in general less effective than using for instance VARCHAR. > Is your concern about altering the column size related to Derby, > Hibernate or something else? > > > Regards, > -- > Kristian > > [1] https://issues.apache.org/jira/browse/DERBY-4278 >> thanks all >> >> >> > > > -- View this message in context: http://www.nabble.com/Hibernate-%2B-Derby---Unable-to-determine-stream-header-for-hibernate-type-%27text%27-tp24099674p24168432.html Sent from the Apache Derby Users mailing list archive at Nabble.com.
