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Posted to commits@cassandra.apache.org by "Benjamin Lerer (JIRA)" <ji...@apache.org> on 2015/11/24 12:49:11 UTC
[jira] [Commented] (CASSANDRA-10532) Allow LWT operation on static
column with only partition keys
[ https://issues.apache.org/jira/browse/CASSANDRA-10532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15024321#comment-15024321 ]
Benjamin Lerer commented on CASSANDRA-10532:
--------------------------------------------
Could you also provide a patch for {{2.1}} ? I checked and the problem is also there.
I have just a few nits:
* In {{2.1}} and {{2.2}} you can simplify the code by using {{!staticConditions.isEmpty() && columnConditions.isEmpty()}} to check if the conditions applies only to static columns
* In {{3.0+}} you can use {{conditions.appliesToStaticColumns() && !conditions.appliesToRegularColumns()}} to check if the conditions applies only to static columns
* In the {{2.2}} patch you adapted the error message for conditions on static columns but not on the {{3.0+}} patches
* In the {{3.0+}} patches you can simplify {{hasAllPKColumnsRestrictedByEqualities}} by reusing {{hasAllPartitionKeyColumnsRestrictedByEqualities}}
* In the unit tests you can checks the assertion using {{assertRows}}:
{code} assertRows(execute("DELETE static_col FROM %s WHERE pk = ? IF static_col = ?", 1, 2), row(false, 1));
assertRows(execute("DELETE static_col FROM %s WHERE pk = ? IF static_col = ?", 1, 10), row(true));{code}
* Could you use {{assertInvalidMessage}} instead {{assertInvalid}}? We had several cases where we got the wrong error message
> Allow LWT operation on static column with only partition keys
> -------------------------------------------------------------
>
> Key: CASSANDRA-10532
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10532
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL
> Environment: C* 2.2.0
> Reporter: DOAN DuyHai
> Assignee: Carl Yeksigian
> Fix For: 2.2.x
>
>
> Schema
> {code:sql}
> CREATE TABLE IF NOT EXISTS achilles_embedded.entity_with_static_column(
> id bigint,
> uuid uuid,
> static_col text static,
> value text,
> PRIMARY KEY(id, uuid));
> {code}
> When trying to prepare the following query
> {code:sql}
> DELETE static_col FROM achilles_embedded.entity_with_static_column WHERE id=:id_Eq IF static_col=:static_col;
> {code}
> I got the error *DELETE statements must restrict all PRIMARY KEY columns with equality relations in order to use IF conditions, but column 'uuid' is not restricted*
> Since the mutation only impacts the static column and the CAS check is on the static column, it makes sense to provide only partition key
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