Function parse_relation

src/transform/tests/test_runner.rs:109–120

Converts string to MirRelationExpr. `args[in]` specifies which input format is being used.

(
        s: &str,
        cat: &TestCatalog,
        args: &HashMap<String, Vec<String>>,
    )

    // Converts string to MirRelationExpr. `args[in]` specifies which input
    // format is being used.
    fn parse_relation(
        s: &str,
        cat: &TestCatalog,
        args: &HashMap<String, Vec<String>>,
    ) -> Result<MirRelationExpr, Error> {
        if let Some(input_format) = args.get(IN) {
            if input_format.iter().any(|s| s == JSON) {
                return serde_json::from_str::<MirRelationExpr>(s).map_err(|e| anyhow!(e));
            }
        }
        build_rel(s, cat).map_err(|e| anyhow!(e))
    }

    /// Converts MirRelationExpr to `format_type`.
    fn convert_rel_to_string(