Adding secondary index with and do not overwrite existing ones
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Key: CASSANDRA-2676
URL: https://issues.apache.org/jira/browse/CASSANDRA-2676
Project: Cassandra
Issue Type: New Feature
Components: API
Reporter: Markus Wiesenbacher
Priority: Minor
Hi,
I am hard working on a web client for Cassandra (about 80% reached by now), and
have a problem. I am using following function to create a new secondary index:
public boolean insertSecondaryIndex (String keyspace, String column_family, int
columnfamilyid, String columnfamily_comparator, String column_validation_class,
String column_index_name, String column_index_field)
throws Exception {
if (!isClosed()) {
client.set_keyspace(keyspace);
CfDef cfDef = new CfDef(keyspace, column_family);
cfDef.setId(columnfamilyid);
cfDef.setComparator_type(columnfamily_comparator);
// secondary index definition
ColumnDef column_metadata = new ColumnDef();
column_metadata.setIndex_name(column_index_name);
column_metadata.setName(ByteBuffer.wrap(column_index_field.getBytes()));
column_metadata.setValidation_class(lastPart(column_validation_class, "."));
column_metadata.setIndex_type(IndexType.KEYS);
cfDef.addToColumn_metadata(column_metadata);
client.system_update_column_family(cfDef);
return true;
}
return false;
}
This seems to overwrite the already existing indices. I use this to select the
indexed field names:
public HashMap<String, String> getIndexColumns (String keyspaceName, String
columnFamilyName)
throws Exception {
HashMap<String, String> toret = new HashMap<String,String>();
if (!isClosed()) {
KsDef keyspace = client.describe_keyspace(keyspaceName);
List<CfDef> columnFamilies = keyspace.getCf_defs();
for (CfDef columnFamily : columnFamilies) {
if
(columnFamily.getName().equalsIgnoreCase(columnFamilyName)) {
Iterator<ColumnDef> iter =
columnFamily.getColumn_metadataIterator();
while (iter.hasNext()) {
ColumnDef cd = iter.next();
toret.put (new
String(cd.getName(), encoding), "");
}
break;
}
}
}
return toret;
}
Is this by design or a bug?
Many thanks and best regards
Wiesi ;)
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