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https://issues.apache.org/jira/browse/CASSANDRA-8254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14196856#comment-14196856
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Michaël Figuière commented on CASSANDRA-8254:
---------------------------------------------
It feels to me that to cope with such situation it would be more elegant to
allow for a single parameter that would be something like a {{List<Tuple<?>>}}.
Going beyond 65k parameters feels odd to me, even in this relevant situation.
> Query parameters (and more) are limited to 65,536 entries
> ---------------------------------------------------------
>
> Key: CASSANDRA-8254
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8254
> Project: Cassandra
> Issue Type: Bug
> Components: API
> Reporter: Nicolas Favre-Felix
>
> Parameterized queries are sent over the wire as a string followed by a list
> of arguments. This list is decoded in QueryOptions.Codec by
> CBUtil.readValueList(body), which in turn reads a 16-bit short value from the
> wire as the number of values to deserialize.
> Sending more values leads to a silent overflow, sometimes reported by the
> driver as a protocol error as other values are deserialized incorrectly.
> 64k sounds like a lot, but tables with a large number of clustering
> dimensions can hit this limit when fetching a few thousand CQL rows only with
> an IN query, e.g.
> {code}
> SELECT * FROM sensor_data WHERE a=? and (b,c,d,e,f,g,h,i) IN
> ((?,?,?,?,?,?,?,?), (?,?,?,?,?,?,?,?), (?,?,?,?,?,?,?,?), (?,?,?,?,?,?,?,?)
> ... )
> {code}
> Here, having 8 dimensions in the clustering key plus 1 in the partitioning
> key restricts the read to 8,191 CQL rows.
> Some other parts of Cassandra still use 16-bit sizes, for example preventing
> users to fetch all elements of a large collection (CASSANDRA-6428). The
> suggestion at the time was "we'll fix it in the next iteration of the binary
> protocol", so I'd like to suggest switching to variable-length integers as
> this would solve such issues while keeping messages short.
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