[jira] [Created] (ARROW-8197) [Rust] DataFusion "create_physical_plan" returns incorrect schema?

["Paddy Horan (Jira)" <ji...@apache.org>]

Paddy Horan created ARROW-8197:
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             Summary: [Rust] DataFusion "create_physical_plan" returns incorrect schema?
                 Key: ARROW-8197
                 URL: https://issues.apache.org/jira/browse/ARROW-8197
             Project: Apache Arrow
          Issue Type: Bug
          Components: Rust, Rust - DataFusion
    Affects Versions: 0.15.1
            Reporter: Paddy Horan


I am using DataFusion in a situation where I know there will only be a single file.  DataFusion currently collects all batches into a vector.

As I am writing the data back out I want to work with an iterator instead of a vector.

I have something as follows:
{code:java}
let plan = ctx.create_logical_plan(&sql).unwrap();
let plan = ctx.optimize(&plan).unwrap();
dbg!(plan.schema());  // Returns field names
let plan = ctx.create_physical_plan(&plan, batch_size).unwrap();
dbg!(plan.schema()); // Returns c0, c1, etc{code}
Maybe this is expected after turning the plan into a physical plan?

I can change the schema of the returned batches, would this be the recommended way to address this or is their something in DataFusion I should leverage to do this?



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