how to delete all records which has same key value in a multi-key table?

[tarbin jiang]

there is a multi-key table in my mysql cluster, such as :
column name                   column type                is key
---------------------------------------------------------
column1                           varchar                      true
column2                           smallint                      true
column3                           text                           false
 
how should I delete all records which has same column1 value with deleteOperation?
bellow is what I did:
        NdbTransaction trans = ndb.startTransaction();        NdbOperation op =
trans.getDeleteOperation(tableName);
        op.equalString("column1", "100");
        ret = trans.execute(ExecType.Commit, AbortOption.AbortOnError,true);       
trans.close();
it return following error: 
com.mysql.cluster.ndbj.NdbApiPermanentException: Operation was not defined correctly,
probably missing a key
 
how should I do?
 
thanks
tarbin

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