[jira] [Created] (CASSANDRA-7062) Extension of static columns for compound cluster keys

["Constance Eustace (JIRA)" <ji...@apache.org>]

Constance Eustace created CASSANDRA-7062:
--------------------------------------------

             Summary: Extension of static columns for compound cluster keys
                 Key: CASSANDRA-7062
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7062
             Project: Cassandra
          Issue Type: New Feature
            Reporter: Constance Eustace
            Priority: Minor


CASSANDRA-6561 implemented static columns for a given partition key.

What this is proposing for a compound cluster key is a static column that is static at intermediate parts of a compound cluster key. This example shows a table modelling a moderately complex EAV pattern  :

CREATE TABLE t (
   entityID text,
   propertyName text,
   valueIndex text,
   entityName text static (entityID),
   propertyType text static (propertyName),
   propertyRelations List<text> static (propertyName),
   PRIMARY KEY (entityID, (propertyName,valueIndex)
)

So in this example has the following static columns:
- the entityName column behaves exactly as CASSANDRA-6561 details, so all cluster rows have the same value
- the propertyName column is static with respect to the remaining parts of the cluster key (that is, across all valueIndex values for a given propertyName)

Is this a relatively simple extension of the same mechanism in -6561, or is this a "whoa, you have no idea what you are proposing"?




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