ClickHouse / ClickHouse/clickhouse-java

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

Open
#2,824 10 comments 4 reactions 0 assignees View on GitHub
area:docs bug client-api-v2 jdbc-v2
Dominant language
Java
Stars
1.6k
Forks
636
Avg merge
2d 16h
Merged PRs (30d)
28

Description

## 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

Contributor guide

Open the contributing guide

Assessment

This issue has not been assessed yet.

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.