One of the columns you are selecting is a list or map or other kind of
collection. You can’t do that with an IN clause against a clustering column.
Either don’t select the collection column OR don’t use the IN clause. Cassandra
is trying to protect itself (and you) from a query that won’t scale well. Honor
that.
As a good practice, you shouldn’t do select * (as a production query) against
any database. You want to list the columns you actually want to select. That
way a later “alter table add column” (or similar) doesn’t cause unpredictable
results to the application.
Sean Durity
From: onmstester onmstester <onmstes...@zoho.com>
Sent: Sunday, May 20, 2018 10:13 AM
To: user <user@cassandra.apache.org>
Subject: [EXTERNAL] IN clause of prepared statement
The table is something like
Samples
...
partition key (partition,resource,(timestamp,metric_name)
creating prepared statement :
session.prepare("select * from samples where partition=:partition and
resource=:resource and timestamp>=:start and timestamp<=:end and metric_name in
:metric_names")
failed with exception:
can not restrict clustering columns by IN relations when a collection is
selected by the query
The query is OK using cqlsh. using column names in select did not help.
Is there anyway to achieve this in Cassandra? I'm aware of performance problems
of this query but it does not matter in my case!
I'm using datastax driver 3.2 and Apache cassandra 3.11.2
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