GitHub user alamb added a comment to the discussion: Does DataFusion Support 
JSON Path Filtering Like `jsonb_path_exists` in PostgreSQL?

I think you can use 
[`ScalarUDF::call`](https://docs.rs/datafusion/latest/datafusion/logical_expr/struct.ScalarUDF.html#method.call)
```rust
let json_path_exist = ScalarUDF::from(Arc::new(impl));
json_path_exist.call(d_col, path)
```

GitHub link: 
https://github.com/apache/datafusion/discussions/15264#discussioncomment-12543424

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