ClickHouse / ClickHouse/clickhouse-java
PreparedStatement.setQueryTimeout() not honored in ClickHouse JDBC driver (version 0.9.1-all)
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- Java
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Description
**Description**
When setQueryTimeout() is applied to a PreparedStatement, the timeout is not honored during query execution.
Even if the query exceeds the configured timeout value, it continues to run until completion or manual termination.
This behavior is observed with the ClickHouse JDBC driver 0.9.1 (classifier: all).
**Steps to Reproduce**
1. Configure a ClickHouse JDBC connection using version 0.9.1-all.
2. Create a long-running query (e.g., SELECT sleep(3)).
3. Use PreparedStatement.setQueryTimeout(1) to set a 1-second timeout.
4. Execute the query.
**Error Log or Exception StackTrace**
No exception or timeout is thrown.
The query runs to completion, ignoring the configured timeout.
**Expected Behaviour**
The query should stop execution after the specified timeout period and throw an SQLTimeoutException.
**Code Example**
```
try (Connection connection = DriverManager.getConnection(url, user, password)) {
String sql = "SELECT sleep(3)"; // intentionally long query
try (PreparedStatement stmt = connection.prepareStatement(sql)) {
stmt.setQueryTimeout(1); // set timeout to 1 seconds
long start = System.currentTimeMillis();
stmt.executeQuery();
long end = System.currentTimeMillis();
System.out.println("Query completed in " + (end - start) / 1000 + " seconds");
}
}catch (SQLTimeoutException te) {
System.err.println("Query timed out: " + te.getMessage());
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
e.printStackTrace();
}
```
Actual Result: The query runs for approximately 3 seconds.
Expected Result: The query should terminate after around 1 seconds and throw an SQLTimeoutException.
### Configuration
#### Client Configuration
```
com.clickhouse
clickhouse-jdbc
0.9.1
all
```
#### Environment
* [ ] Cloud
Client version: java jdbc v2 0.9.2 and 0.9.1
Language version: Java 17
OS:
#### ClickHouse Server
* ClickHouse Server version:
* ClickHouse Server non-default settings, if any:
* `CREATE TABLE` statements for tables involved:
* Sample data for all these tables, use [clickhouse-obfuscator](https://github.com/ClickHouse/ClickHouse/blob/master/programs/obfuscator/Obfuscator.cpp#L42-L80) if necessary
Guide de contribution
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Piste de recherche
Commencez au point d’entrée JDBC PreparedStatement.setQueryTimeout() et reproduisez le problème avec SELECT sleep(3) en utilisant Java 17 et le pilote 0.9.1-all. Vérifiez qu’un délai d’expiration d’une seconde interrompt l’exécution et produit une SQLTimeoutException, comme indiqué dans le comportement attendu.
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Évaluation
- Stack technique
- java
- Domaine
- databases
- Type d'issue
- Bug
- Difficulté
- 4/5
- Temps estimé
- 3-5 jours
- Activité
- Calme
- Clarté
- Plutôt claire
- Accessibilité débutants
- 55/100