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Support for query cancelling via Statement#cancel #7

Description

@monetdb-team

Date: 2017-02-20 11:50:18 +0100
From: Manuel <>
To: clients devs <>
Version: 11.25.5 (Dec2016-SP1)
CC: martin.van.dinther

Depends on: #5
Last updated: 2017-03-02 18:35:15 +0100

Comment 25044

Date: 2017-02-20 11:50:18 +0100
From: Manuel <>

User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
Build Identifier:

Feature request: add support for query cancelling via java.sql.Statementcancel method

Reproducible: Always

Steps to Reproduce:

Using the latest version of the Monetdb jdbc driver it is not possible to cancel queries via java.sql.Statementcancel method

Actual Results:

An SqlException is thrown

Expected Results:

The statement is cancelled in both the DBMS and driver.

Comment 25091

Date: 2017-03-02 18:35:15 +0100
From: Martin van Dinther <<martin.van.dinther>>

Thanks for the request. This method is indeed not implemented in JDBC (and ODBC).

As an alternative to prevent very long running queries you can set a query timeout before executing the query. This can be done in your Java program if you can edit the sources, see http://docs.oracle.com/javase/7/docs/api/java/sql/Statement.htmlsetQueryTimeout(int)
or via an SQL command: call sys.settimeout(bigint);

It is not the same as cancelling a running query, but it may help in some user scenarios.

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