The API does not support this. You can remove a column from a supercolumn,
or a supercolumn from a row; if you wan tto remove a column from each
supercolumn, you'll need to slice out the supercolumns, then create a batch
of remove-subcolumn operations.
On Wed, Dec 15, 2010 at 11:03 AM, Michal Augustýn <augustyn.mic...@gmail.com
> wrote:
> Helllo,
>
> I want to remove one column from all super columns in one row (for one key)
> (via Thrift, Cassandra 0.7) but I got exception (see below).
> I just call "remove" method where ColumnPath structure has "column_family"
> and "column" members set ("super_column" not set).
>
> ERROR 17:57:46,924 Error in ThreadPoolExecutor
> java.lang.RuntimeException: java.lang.ClassCastException:
> org.apache.cassandra.db.DeletedColumn cannot be cast to
> org.apache.cassandra.db.SuperColumn
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:34)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: java.lang.ClassCastException:
> org.apache.cassandra.db.DeletedColumn cannot be cast to
> org.apache.cassandra.db.SuperColumn
> at
> org.apache.cassandra.db.SuperColumnSerializer.serialize(SuperColumn.java:318)
> at
> org.apache.cassandra.db.SuperColumnSerializer.serialize(SuperColumn.java:298)
> at
> org.apache.cassandra.db.ColumnFamilySerializer.serializeForSSTable(ColumnFamilySerializer.java:82)
> at
> org.apache.cassandra.db.ColumnFamilySerializer.serialize(ColumnFamilySerializer.java:68)
> at
> org.apache.cassandra.db.RowMutationSerializer.freezeTheMaps(RowMutation.java:344)
> at
> org.apache.cassandra.db.RowMutationSerializer.serialize(RowMutation.java:355)
> at
> org.apache.cassandra.db.RowMutationSerializer.serialize(RowMutation.java:333)
> at
> org.apache.cassandra.db.RowMutation.getSerializedBuffer(RowMutation.java:269)
> at org.apache.cassandra.db.RowMutation.apply(RowMutation.java:194)
> at
> org.apache.cassandra.service.StorageProxy$1.runMayThrow(StorageProxy.java:197)
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
> ... 3 more
> ERROR 17:57:46,928 Fatal exception in thread
> Thread[MUTATION_STAGE:2,5,main]
> java.lang.RuntimeException: java.lang.ClassCastException:
> org.apache.cassandra.db.DeletedColumn cannot be cast to
> org.apache.cassandra.db.SuperColumn
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:34)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: java.lang.ClassCastException:
> org.apache.cassandra.db.DeletedColumn cannot be cast to
> org.apache.cassandra.db.SuperColumn
> at
> org.apache.cassandra.db.SuperColumnSerializer.serialize(SuperColumn.java:318)
> at
> org.apache.cassandra.db.SuperColumnSerializer.serialize(SuperColumn.java:298)
> at
> org.apache.cassandra.db.ColumnFamilySerializer.serializeForSSTable(ColumnFamilySerializer.java:82)
> at
> org.apache.cassandra.db.ColumnFamilySerializer.serialize(ColumnFamilySerializer.java:68)
> at
> org.apache.cassandra.db.RowMutationSerializer.freezeTheMaps(RowMutation.java:344)
> at
> org.apache.cassandra.db.RowMutationSerializer.serialize(RowMutation.java:355)
> at
> org.apache.cassandra.db.RowMutationSerializer.serialize(RowMutation.java:333)
> at
> org.apache.cassandra.db.RowMutation.getSerializedBuffer(RowMutation.java:269)
> at org.apache.cassandra.db.RowMutation.apply(RowMutation.java:194)
> at
> org.apache.cassandra.service.StorageProxy$1.runMayThrow(StorageProxy.java:197)
> at
> org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30)
> ... 3 more
>
> Thank you!
>
> Augi
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--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com
