[MDEV-4000] Mapping between Cassandra blob (BytesType) and MySQL BLOB does not work - Jira

Specification in the KB says that there should be mapping between MySQL BLOB and Cassandra blob (https://kb.askmonty.org/en/cassandra-storage-engine/). It doesn't seem to work:

cqlsh:manual_test> create columnfamily cf13 ( rowkey int primary key, b blob );

[default@manual_test] describe cf13;

    ColumnFamily: cf13

      Key Validation Class: org.apache.cassandra.db.marshal.Int32Type

      Default column value validator: org.apache.cassandra.db.marshal.UTF8Type

      Columns sorted by: org.apache.cassandra.db.marshal.UTF8Type

      GC grace seconds: 864000

      Compaction min/max thresholds: 4/32

      Read repair chance: 0.1

      DC Local Read repair chance: 0.0

      Replicate on write: true

      Caching: KEYS_ONLY

      Bloom Filter FP chance: default

      Built indexes: []

      Column Metadata:

        Column Name: b

          Validation Class: org.apache.cassandra.db.marshal.BytesType

      Compaction Strategy: org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy

      Compression Options:

        sstable_compression: org.apache.cassandra.io.compress.SnappyCompressor

create table t13 (rowkey int primary key, b blob ) ENGINE=CASSANDRA `keyspace`='manual_test' `column_family`='cf13';

ERROR 1928 (HY000): Internal error: 'Failed to map column b to datatype org.apache.cassandra.db.marshal.BytesType'

VARBINARY works:

create table t13 (rowkey int primary key, b varbinary(1024) ) ENGINE=CASSANDRA `keyspace`='manual_test' `column_family`='cf13';

# Query OK, 0 rows affected (0.04 sec)

revision-id: psergey@askmonty.org-20121224043622-xn8g8y3vhtu1lb3w

revno: 3459

branch: 10.0-base-cassandra

Maybe it requires additional options in column family specification? In this case it would be good to document them.

relates to

MDEV-431 Cassandra storage engine

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