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https://issues.apache.org/jira/browse/CASSANDRA-15641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17058951#comment-17058951
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Konstantin commented on CASSANDRA-15641:
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Konstantin Osipov
what I am curious about though, is there any way to hit the code path I
highlighted? I can't build a relevant query
beobal 8:38 PM
@Konstantin Osipov session.execute(SimpleStatement("select * from ks.t where a
in (1, 2) ", fetch_size=-1, consistency_level=ConsistencyLevel.SERIAL))
Konstantin Osipov 8:39 PM
why does fetch_size matter? there is only a handful of rows in the table
anyway..
beobal 8:41 PM
fetch_size=-1 disables paging. With paging enabled the multiple single
partition reads are executed separately (and paged), but disabling it shortcuts
that and goes straight to StorageProxy::read with a group of size 2
> No error if consistency_level = SERIAL and unqualified select
> -------------------------------------------------------------
>
> Key: CASSANDRA-15641
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15641
> Project: Cassandra
> Issue Type: Bug
> Components: CQL/Semantics
> Reporter: Konstantin
> Priority: Normal
> Attachments: test.py
>
>
> The attached test program produces no errors, while doesn't provide serial
> consistency. There is no exception that the consistency level is incorrect.
> It's simply silently downgraded. The issue is not documented either.
> kostja@atlas ~ % python test.py
> Row(a=1, b=1)
> Row(a=0, b=0)
> Row(a=2, b=2)
> Row(a=3, b=3)
> Row(a=1, b=1)
> Row(a=2, b=2)
> The behavior is contrary to the original intent by LWT author, since the code
> has the following check:
> if (group.queries.size() > 1)
> throw new InvalidRequestException("SERIAL/LOCAL_SERIAL
> consistency may only be requested for one partition at a time");
> https://github.com/apache/cassandra/blob/cassandra-3.11/src/java/org/apache/cassandra/service/StorageProxy.java#L1593
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