cassandra-cli

We tried to drop CF's using cassandra cli DROP COLUMN FAMILY cfName And when we list the CF from CLI it was not there and when i tried to get the existing CF's via hector I still could see the CF name KeyspaceDefinition keyspaceDefinition = newConnection().describeKeyspace(keyspaceName); keyspaceDefinition.getCfDefs(); Data inside the CF is not there however, the CF is still listed, after listing the CFs via hector if i do a cassandra -cli list column families i can see my deleted CF again I had to deal with this issue back on Cassandra 1.1 as well. Basically, my column family had become

Im starting with cassandra , and when I run list or get commands in cassandra-cli , I get results like this: [default@usersdatabase] list users; Using default limit of 100 ------------------- RowKey: boby => (column=6e616d65, value=426f62, timestamp=1294780856414000) ------------------- RowKey: edzuksm => (column=656d61696c, value=6d617268656c697340696e626f782e6c76, timestamp=1294780533705000) => (column=6e616d65, value=45647561726473, timestamp=1294780488155000) => (column=7375726e616d65, value=4d617268656c6973, timestamp=1294780515429000) 2 Rows Returned. I can't read it, I see only values

I need details from both performance and query aspects, I learnt from some site that only a key can be given when using a columnfamily, if so what would you suggest for my keyspace, I need to use group by, order by, count, sum, ifnull, concat, joins, and some times nested queries. To answer the original question you posed: a column family and a table are the same thing. The name "column family" was used in the older Thrift API . The name "table" is used in the newer CQL API . More info on the APIs can be found here: http://wiki.apache.org/cassandra/API If you need to use "group by,order by

I want to select specific fields of a table in cassandra and insert them into another table. I do this in sql server like this: INSERT INTO Users(name,family) SELECT name,family FROM Users How to to this in cassandra-cli or cqlsh? COPY keyspace.columnfamily1 (column1, column2,...) TO 'temp.csv'; COPY keyspace.columnfamily2 (column1, column2,...) FROM 'temp.csv'; here give your keyspace(schema-name) and instead of columnfamilyname1 use the table to which you want to copy and in columnfamily2 give the tablename in which you want to copy.. And yes this is solution for CQL,however I have never

I am newbie in Cassandra and trying to implement one toy application using Cassandra. I had created one keyspace and few column families in my Cassandra DB but I forgot the name of my cluster. I am trying to find if there is any query which can list down all the available keyspaces. Anybody knows such a query or command? If you want to do this outside of the cqlsh tool you can query the schema_keyspaces table in the system keyspace. There's also a table called schema_columnfamilies which contains information about all tables. The DESCRIBE and SHOW commands only work in cqlsh and cassandra-cli