Function ok_result

crates/integrations/datafusion/src/sql_context.rs:2292–2304

Return an empty DataFrame with a single "result" column containing "OK".

(ctx: &SessionContext)

/// Return an empty DataFrame with a single "result" column containing "OK".
fn ok_result(ctx: &SessionContext) -> DFResult<DataFrame> {
    let schema = Arc::new(Schema::new(vec![Field::new(
        "result",
        ArrowDataType::Utf8,
        false,
    )]));
    let batch = RecordBatch::try_new(
        schema.clone(),
        vec![Arc::new(StringArray::from(vec!["OK"]))],
    )?;
    let df = ctx.read_batch(batch)?;
    Ok(df)
}

/// Registers the built-in table-valued functions against `catalog` so they can
/// be used in SQL without any extra setup call. Called for every catalog