João Reis created CASSANDRA-20028:
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Summary: METADATA_CHANGED is never set
Key: CASSANDRA-20028
URL: https://issues.apache.org/jira/browse/CASSANDRA-20028
Project: Cassandra
Issue Type: Bug
Reporter: João Reis
CASSANDRA-10786 added the METADATA_CHANGED flag to the v5 spec (ROWS RESPONSE).
Drivers are supposed to handle this flag and update their locally cached
prepared statement object with the new metadata.
As we're working to implement v5 support on GoCQL we are trying to trigger a
scenario where C* returns this flag but we are unable to. Instead we receive an
UNPREPARED which causes the driver to re-prepare the statement. This flag was
added to avoid this scenario so I don't really understand if there is a bug
somewhere or if the test case we're creating is not valid?
I ran the following steps against C* 4.0-rc1, 4.0.0 and 5.0.2 with the same
results:
{code}
CREATE KEYSPACE testks WITH REPLICATION = { 'class': 'SimpleStrategy',
'replication_factor': 1 }
CREATE TABLE testks.testtable (id uuid PRIMARY KEY, txt TEXT)
INSERT INTO testks.testtable(id, txt) VALUES (uuid(), 'test')
// PREPARED_ID: 2bea4b54ec20bd3533f7b91467abb618
// RESULT METADATA ID: 1f685bd34ed0ba1e99ba6bd960da2545
SELECT * FROM testks.testtable
ALTER TABLE testks.testtable ADD (txt2 TEXT)
INSERT INTO testks.testtable(id, txt, txt2) VALUES (uuid(), 'test2', 'test222')
// this SELECT gets an UNPREPARED response from the server
// instead of a ROWS response with the new metadata
//
// after RE-PREPARE:
// PREPARED_ID: 2bea4b54ec20bd3533f7b91467abb618
// RESULT METADATA ID: 87257e07eccd14a6c8e623012af9278a
SELECT * FROM testtable
{code}
Note that v5 support on gocql is still WIP so I imported gocql from this branch
https://github.com/apache/cassandra-gocql-driver/pull/1822/files to test this
with gocql.
I believe [~lukasz.antoniak] was able to reproduce this with the java driver
which has had v5 support for a while and got the same results, I'll ask him to
post a comment on this ticket.
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