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https://issues.apache.org/jira/browse/CASSANDRA-6875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13986770#comment-13986770
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Tyler Hobbs commented on CASSANDRA-6875:
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bq. We can, see cql_prepared_test.py (arguably our number of tests for prepared
statement is deeply lacking, but it's possible to have some).
Ah, thanks, good to know.
bq. I'll fight to the death the concept that "unit test are a lot faster to
work with" as an absolute truth.
Don't worry, I'm not going to challenge you to a duel :). It's not an absolute
truth, but it's easy to do things like run a unit test with the debugger on,
which makes a big difference in some cases.
bq. fixing those issue is likely simpler than migrating all the existing tests
back to the unit tests.
I'm definitely not suggesting moving any existing dtests to unit tests. I'm
just proposing that we allow some mix of unit tests and dtests for newly
written tests.
bq. we could have a debate I suppose (but definitively not here)
Do you mind if I start a dev ML thread? It would be good to get input from
other devs and QA.
> CQL3: select multiple CQL rows in a single partition using IN
> -------------------------------------------------------------
>
> Key: CASSANDRA-6875
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6875
> Project: Cassandra
> Issue Type: Bug
> Components: API
> Reporter: Nicolas Favre-Felix
> Assignee: Tyler Hobbs
> Priority: Minor
> Fix For: 2.0.8
>
>
> In the spirit of CASSANDRA-4851 and to bring CQL to parity with Thrift, it is
> important to support reading several distinct CQL rows from a given partition
> using a distinct set of "coordinates" for these rows within the partition.
> CASSANDRA-4851 introduced a range scan over the multi-dimensional space of
> clustering keys. We also need to support a "multi-get" of CQL rows,
> potentially using the "IN" keyword to define a set of clustering keys to
> fetch at once.
> (reusing the same example\:)
> Consider the following table:
> {code}
> CREATE TABLE test (
> k int,
> c1 int,
> c2 int,
> PRIMARY KEY (k, c1, c2)
> );
> {code}
> with the following data:
> {code}
> k | c1 | c2
> ---+----+----
> 0 | 0 | 0
> 0 | 0 | 1
> 0 | 1 | 0
> 0 | 1 | 1
> {code}
> We can fetch a single row or a range of rows, but not a set of them:
> {code}
> > SELECT * FROM test WHERE k = 0 AND (c1, c2) IN ((0, 0), (1,1)) ;
> Bad Request: line 1:54 missing EOF at ','
> {code}
> Supporting this syntax would return:
> {code}
> k | c1 | c2
> ---+----+----
> 0 | 0 | 0
> 0 | 1 | 1
> {code}
> Being able to fetch these two CQL rows in a single read is important to
> maintain partition-level isolation.
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