[jira] [Created] (CASSANDRA-8425) Add full entry indexing capability for maps

["Lex Lythius (JIRA)" <ji...@apache.org>]

Lex Lythius created CASSANDRA-8425:
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             Summary: Add full entry indexing capability for maps
                 Key: CASSANDRA-8425
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8425
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
            Reporter: Lex Lythius
            Priority: Minor


Since C* 2.1 we're able to index map keys or map values and query them using {{CONTAINS KEY}} and {{CONTAINS}} respectively.

However, some use cases require being able to filter for specific key/value combination. Syntax might be something along the lines of 
{code:sql}
SELECT * FROM table WHERE map['country'] = 'usa';
{code}
or
{code:sql}
SELECT * FROM table WHERE map CONTAINS ENTRY { 'country': 'usa' };
{code}

Of course, right now we can have the client refine the results from
{code:sql}
SELECT * FROM table WHERE map CONTAINS { 'usa' };
{code}
or
{code:sql}
SELECT * FROM table WHERE map CONTAINS KEY { 'country' };
{code}
but I believe this would add a good deal of flexibility.



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