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Posted to commits@cassandra.apache.org by "Carlo Bertuccini (JIRA)" <ji...@apache.org> on 2014/07/09 20:01:12 UTC
[jira] [Updated] (CASSANDRA-7529) IN clause does not work correctly
outside the QueryBuilder
[ https://issues.apache.org/jira/browse/CASSANDRA-7529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Carlo Bertuccini updated CASSANDRA-7529:
----------------------------------------
Description:
There is a strange behaviour of the IN clause with lots of keys when used outside a QueryBuilder. Here is the test I did using the Java Driver 2.0.3 and Cassandra 2.0.7
{code}
CREATE TABLE inlimit (
key int,
value text,
PRIMARY KEY (key)
)
{code}
I've populated the table with 105000 entries (key from 1 to 105000).
{code}
cqlsh:test> select count(*) from inlimit limit 200000;
count
--------
105000
{code}
Here the test:
{code}
String query = "SELECT * FROM inlimit WHERE key IN :key";
PreparedStatement ps = Cassandra.DB.getSession().prepare(query);
BoundStatement bs = new BoundStatement(ps);
List<Integer> l = new ArrayList<>();
for (int i = 0; i < 100000; i++) {
l.add(i);
}
bs.setList("key", l);
ResultSet rs = Cassandra.DB.getSession().execute(bs);
System.out.println("counted rows: " + rs.all().size());
{code}
Here the output:
{panel}
counted rows: 34464
{panel}
While with QueryBuilder everything changes:
{code}
List<Integer> l = new ArrayList<>();
for (int i = 0; i < 100000; i++) {
l.add(i);
}
BuiltStatement bs = QueryBuilder.select().all().from("inlimit").where(in("key", l.toArray()));
ResultSet rs = Cassandra.DB.getSession().execute(bs);
System.out.println("counted rows: " + rs.all().size());
{code}
The new output
{panel}
counted rows: 100000
{panel}
BTW: I'd suggest to write somewhere if the IN clause has some limitations cause I found this question without answer in many forums.
Cheers,
Carlo
was:
There is a strange behaviour of the IN clause with lots of keys when used outside a QueryBuilder. Here is the test I did using the Java Driver 2.0.3 and Cassandra 2.0.7
{code}
CREATE TABLE inlimit (
key int,
value text,
PRIMARY KEY (key)
)
{code}
I've populated the table with 105000 entries (key from 1 to 105000).
{code}
cqlsh:test> select count(*) from inlimit limit 200000;
count
--------
105000
{code}
Here the test:
{code}
String query = "SELECT * FROM inlimit WHERE key IN :key";
PreparedStatement ps = Cassandra.DB.getSession().prepare(query);
BoundStatement bs = new BoundStatement(ps);
List<Integer> l = new ArrayList<>();
for (int i = 0; i < 100000; i++) {
l.add(i);
}
bs.setList("key", l);
ResultSet rs = Cassandra.DB.getSession().execute(bs);
System.out.println("counted rows: " + rs.all().size());
{code}
Here the output:
{panel}
counted rows: 34464
{panel}
While with QueryBuilder everything changes:
{code}
List<Integer> l = new ArrayList<>();
for (int i = 0; i < 100000; i++) {
l.add(i);
}
BuiltStatement bs = QueryBuilder.select().column("key").from("inlimit").where(in("key", l.toArray()));
ResultSet rs = Cassandra.DB.getSession().execute(bs);
System.out.println("counted rows: " + rs.all().size());
{code}
The new output
{panel}
counted rows: 100000
{panel}
BTW: I'd suggest to write somewhere if the IN clause has some limitations cause I found this question without answer in many forums.
Cheers,
Carlo
> IN clause does not work correctly outside the QueryBuilder
> ----------------------------------------------------------
>
> Key: CASSANDRA-7529
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7529
> Project: Cassandra
> Issue Type: Bug
> Components: Drivers (now out of tree)
> Reporter: Carlo Bertuccini
> Priority: Critical
> Labels: In, PreparedStatement, QueryBuilder
>
> There is a strange behaviour of the IN clause with lots of keys when used outside a QueryBuilder. Here is the test I did using the Java Driver 2.0.3 and Cassandra 2.0.7
> {code}
> CREATE TABLE inlimit (
> key int,
> value text,
> PRIMARY KEY (key)
> )
> {code}
> I've populated the table with 105000 entries (key from 1 to 105000).
> {code}
> cqlsh:test> select count(*) from inlimit limit 200000;
> count
> --------
> 105000
> {code}
> Here the test:
> {code}
> String query = "SELECT * FROM inlimit WHERE key IN :key";
> PreparedStatement ps = Cassandra.DB.getSession().prepare(query);
> BoundStatement bs = new BoundStatement(ps);
> List<Integer> l = new ArrayList<>();
> for (int i = 0; i < 100000; i++) {
> l.add(i);
> }
> bs.setList("key", l);
> ResultSet rs = Cassandra.DB.getSession().execute(bs);
> System.out.println("counted rows: " + rs.all().size());
> {code}
> Here the output:
> {panel}
> counted rows: 34464
> {panel}
> While with QueryBuilder everything changes:
> {code}
> List<Integer> l = new ArrayList<>();
> for (int i = 0; i < 100000; i++) {
> l.add(i);
> }
> BuiltStatement bs = QueryBuilder.select().all().from("inlimit").where(in("key", l.toArray()));
> ResultSet rs = Cassandra.DB.getSession().execute(bs);
> System.out.println("counted rows: " + rs.all().size());
> {code}
> The new output
> {panel}
> counted rows: 100000
> {panel}
> BTW: I'd suggest to write somewhere if the IN clause has some limitations cause I found this question without answer in many forums.
> Cheers,
> Carlo
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