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From "Scott Carey (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-14533) Frozen Collections should allow TTL and WRITETIME access
Date Wed, 20 Jun 2018 16:40:00 GMT
Scott Carey created CASSANDRA-14533:
---------------------------------------

             Summary: Frozen Collections should allow TTL and WRITETIME access
                 Key: CASSANDRA-14533
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14533
             Project: Cassandra
          Issue Type: Bug
          Components: CQL
            Reporter: Scott Carey


It is clear why we can not simply access ttl and writetime of normal collections, as the
collection itself is made up of multiple cells  (see CASSANDRA-8877)

 

But frozen collections should allow it, since they are just one cell with the whole collection
stored in a simple blob.

 

Right now, I get an error message whether it is frozen or not:

 
{noformat}
cqlsh:testing> create table stuff (id int primary key, blah text, stuff frozen<set<text>>);

cqlsh:testing> insert into stuff (id, blah, stuff) VALUES (1, 'blargh', { 'setstuff' });

cqlsh:testing> select id, blah, writetime(blah) from stuff;

id | blah | writetime(blah)
----+--------+------------------
1 | blargh | 1529512132503886

(1 rows)

cqlsh:testing> select id, stuff, writetime(stuff) from stuff;
InvalidRequest: Error from server: code=2200 [Invalid query] message="Cannot use selection
function writeTime on collections"

cqlsh:testing> select id, stuff from stuff;

id | stuff
----+--------------
1 | {'setstuff'}{noformat}
 

It is likewise not possible to get the timestamp on a frozen collection from the java client.



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