Can't delete whole row from Hadoop MapReduce
--------------------------------------------
Key: CASSANDRA-2014
URL: https://issues.apache.org/jira/browse/CASSANDRA-2014
Project: Cassandra
Issue Type: Bug
Components: Hadoop
Affects Versions: 0.7.0
Environment: Debian Linux 2.6.32 amd64
Reporter: Patrik Modesto
ColumnFamilyRecordWriter.java doesn't support Mutation with Deletion without
slice_predicat and super_column to delete whole row. The other way I tried is
to specify SlicePredicate with empty start and finish and I got:
{{
java.io.IOException: InvalidRequestException(why:Deletion does not yet support
SliceRange predicates.)
at
org.apache.cassandra.hadoop.ColumnFamilyRecordWriter$RangeClient.run(ColumnFamilyRecordWriter.java:355)
}}
I tryied to patch the ColumnFamilyRecordWriter.java like this:
{{
--- a/src/java/org/apache/cassandra/hadoop/ColumnFamilyRecordWriter.java
+++ b/src/java/org/apache/cassandra/hadoop/ColumnFamilyRecordWriter.java
@@ -166,10 +166,17 @@ implements
org.apache.hadoop.mapred.RecordWriter<ByteBuffer,List<org.apache.cass
// deletion
Deletion deletion = new Deletion(amut.deletion.timestamp);
mutation.setDeletion(deletion);
+
org.apache.cassandra.avro.SlicePredicate apred =
amut.deletion.predicate;
- if (amut.deletion.super_column != null)
+ if (apred == null && amut.deletion.super_column == null)
+ {
+ // epmty; delete whole row
+ }
+ else if (amut.deletion.super_column != null)
+ {
// super column
deletion.setSuper_column(copy(amut.deletion.super_column));
+ }
else if (apred.column_names != null)
{
// column names
}}
but that didn't work as well.
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