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# `datafusion-config`
<a name="datafusion-config"></a>


**Parameter Details**  

|  |  | 
| --- |--- |
| Default | (empty) | 
| Allowed Values | Colon-separated key:value pairs (e.g., batch\_size:16384,coalesce\_batches:true) | 
| Category | Query Execution | 

**Detailed Explanation:**

Allows passing additional key-value configuration parameters directly to the DataFusion engine. **Format is comma-separated `key:value` pairs using colons, not equals signs.**

**Recommendation:** Leave empty (default) unless you have specific DataFusion tuning requirements validated through testing.