What is difference between primary key((name, surname),age) and primary key(name, surname ,age) – prakash pandey feb 7 '17 at 12:51 @prakashpandey those are composite keys . as stated on the provided link: a composite partition key is a partition key consisting of multiple columns.. What is the best practice for modifying the primary key definition of a table in cassandra 1.2.9? say i have this table: create table temperature ( weatherstation_id text, event_time timestamp, temperature text, primary key (weatherstation_id,event_time)); i want to add a new column named version and include that column in the primary key.. The main purpose of rename is to change the names of cql-generated primary key and column names that are missing from a legacy table. the following restrictions apply to the rename operation: you can only rename clustering columns, which are part of the primary key. you cannot rename the partition key..
A simple primary key consists of only the partition key which determines which node stores the data. for a table with a simple primary key, cassandra uses one column name as the partition key. the primary key consists of only the partition key in this case.. The primary key definition is made up of two parts: the partition key and the clustering columns. the first part maps to the storage engine row key, while the second is used to group columns in a row. in the storage engine the columns are grouped by prefixing their name with the value of the clustering columns.. Defining a primary key column the only schema information that must be defined for a table is the primary key and its associated data type. the only schema information that must be defined for a table is the primary key and its associated data type..