Using a CQL query
Using CQL to query a legacy table.
Using CQL, you can query a legacy table. A legacy table managed in CQL includes an implicit WITH COMPACT STORAGE directive. When you use CQL to query legacy tables with no column names defined for data within a partition, Cassandra generates the names (column1 and value1) for the data. Using the RENAME clause, you can change the default column name to a more meaningful name.
ALTER TABLE users RENAME userid to user_id;
CQL supports dynamic tables created in the Thrift API, CLI, and earlier CQL versions. For example, a dynamic table is represented and queried like this:
CREATE TABLE clicks ( userid uuid, url text, timestamp date PRIMARY KEY (userid, url ) ) WITH COMPACT STORAGE; SELECT url, timestamp FROM clicks WHERE userid = 148e9150-1dd2-11b2-0000-242d50cf1fff; SELECT timestamp FROM clicks WHERE userid = 148e9150-1dd2-11b2-0000-242d50cf1fff AND url = 'http://google.com';
In these queries, only equality conditions are valid.
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