ClickHouse / ClickHouse/clickhouse-java

Unknown aggregate function: avgIf` occurs when querying via JDBC. (Trino and Dbeaver)

Abierto
#2,824 10 comentarios 4 reacciones 0 asignados Ver en GitHub
area:docs bug client-api-v2 jdbc-v2
Lenguaje dominante
Java
Estrellas
1.6k
Forks
636
Merge medio
2 d 23 h
PR fusionados (30 d)
29

Descripción

## Description

**Problem Analysis:**

**Core issue:** An error occurs when executing a query against the `default.nm_advert_stats_daily` table via the JDBC driver (DBeaver), whereas a direct query using the native ClickHouse client works correctly.

**Key points:**
1. **Error:** `Unknown aggregate function: avgIf` occurs when querying via JDBC.
2. **Direct query** in the ClickHouse console executes successfully.
3. **The table** uses aggregate functions in its columns:
- `position_avg_state AggregateFunction(avgIf, Float64, UInt8)`
- `position_quantiles_state AggregateFunction(quantilesTDigestIf(0.5, 0.9, 0.95), Float64, UInt8)`

**Software versions:**
- ClickHouse Server: 24.8.8
- JDBC Driver: Official ClickHouse driver (server version 21.3+)

**The Problem:** There is an incompatibility between the JDBC driver version and the ClickHouse server version. The driver does not recognize the syntax of the aggregate functions (`avgIf`) that are supported by the server.

**Solutions suggested by the participants:**
- Fix JDBC driver is up to date due to we can't use native client for Trino and Dbeaver

### Steps to reproduce
1.
2.
3.
### Error Log or Exception StackTrace

```
Trino try to select

select *
from table(ads_ch_ch.system.query(
query => 'select * from default.nm_advert_stats_daily limit 100'
)); -- this is native clickhouse execution

QL Error [65536]: Query failed (#20260407_141005_02502_hqy64): com.google.common.util.concurrent.UncheckedExecutionException: java.lang.IllegalArgumentException: Unknown aggregate function: avgIf

```

### Expected Behaviour

### Code Example

```java

```

### Configuration

#### Client Configuration
```java

```

#### Environment
* [ ] Cloud
* Client version:
* Language version:
* 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

Guía de contribución

Abrir la guía de contribución

Línea de trabajo

The report names the JDBC driver, DBeaver, Trino, and the default.nm_advert_stats_daily table, but no repository files or tests. Start by reproducing the Trino JDBC query and comparing it with the native ClickHouse query using the stated server and driver versions; done means the JDBC path handles the avgIf aggregate function without the reported error.

Escrito por el modelo de indexación a partir del texto del issue.

Evaluación

Stack tecnológico
java, sql
Área
api, database
Tipo de issue
Error
Dificultad
4/5
Tiempo estimado
3-5 días
Estado de actividad
Tranquilo
Claridad
Necesita aclaración
Aptitud para principiantes
35/100

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