Function test_alias_with_metadata

datafusion/core/tests/dataframe/mod.rs:6197–6210

()

#[tokio::test]
async fn test_alias_with_metadata() -> Result<()> {
    let mut metadata = HashMap::new();
    metadata.insert(String::from("k"), String::from("v"));
    let metadata = FieldMetadata::from(metadata);
    let df = create_test_table("test")
        .await?
        .select(vec![col("a").alias_with_metadata("b", Some(metadata))])?
        .alias("table_alias")?;
    let df = df.select(vec![col("table_alias.b")])?;
    let schema = df.schema();
    let metadata = schema.field(0).metadata();
    assert_eq!(metadata.get("k"), Some(&String::from("v")));
    Ok(())
}

// Use alias to perform a self-join
// Issue: https://github.com/apache/datafusion/issues/14112