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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4739) Prepared Statements don't support collections
Date Tue, 02 Oct 2012 16:09:07 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13467820#comment-13467820
] 

Jonathan Ellis commented on CASSANDRA-4739:
-------------------------------------------

bq. this require a little bit of specific code because we must "deserialize" the sent list
to be able to insert internally one column per element

How is this different from Collection support in non-prepared statements?
                
> Prepared Statements don't support collections
> ---------------------------------------------
>
>                 Key: CASSANDRA-4739
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4739
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.2.0 beta 1
>         Environment: Cassandra 937f15e1
> OS X 10.8.2
> java version "1.6.0_35"
> Java(TM) SE Runtime Environment (build 1.6.0_35-b10-428-11M3811)
> Java HotSpot(TM) 64-Bit Server VM (build 20.10-b01-428, mixed mode)
>            Reporter: Jonathan Rudenberg
>            Assignee: Sylvain Lebresne
>             Fix For: 1.2.0 beta 2
>
>         Attachments: 4739.txt
>
>
> I'm putting a collection onto the wire in an EXECUTE request with exactly the same bytes
that Cassandra encodes the same data in a response:
> "Can't apply operation on column with org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type)
type"
> Here's the full trace log from cassandra:
> {noformat}
> DEBUG 19:24:15,414 Received: PREPARE INSERT INTO things (id, set_text) VALUES (?, ?);
> TRACE 19:24:15,414 CQL QUERY: INSERT INTO things (id, set_text) VALUES (?, ?);
> TRACE 19:24:15,415 Stored prepared statement #413587006 with 2 bind markers
> DEBUG 19:24:15,415 Responding: RESULT PREPARED 413587006 [id(gocql_collections, things),
org.apache.cassandra.db.marshal.TimeUUIDType][set_text(gocql_collections, things), org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type)]
> DEBUG 19:24:15,416 Received: EXECUTE 413587006 with 2 values
> TRACE 19:24:15,416 [1] 'java.nio.HeapByteBuffer[pos=18 lim=34 cap=53]'
> TRACE 19:24:15,416 [2] 'java.nio.HeapByteBuffer[pos=38 lim=51 cap=53]'
> DEBUG 19:24:15,417 Responding: ERROR INVALID: Can't apply operation on column with org.apache.cassandra.db.marshal.SetType(org.apache.cassandra.db.marshal.UTF8Type)
type.
> {noformat}
> The prepared statement is:
> {noformat}
> INSERT INTO things (id, set_text) VALUES (?, ?);
> {noformat}
> and the collection value ({'asdf', 'sdf'}) is encoded as:
> {noformat}
> 00 02 00 04 61 73 64 66 00 03 73 64 66
> {noformat}
> which is byte-for-byte exactly the same as what I get from Cassandra off the wire when
I do a query for the same data.
> I already have the driver working with other queries/inserts with all other types, so
this is just a collection encoding problem.

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