Function basic

datafusion/core/tests/expr_api/simplification.rs:156–172

()

#[test]
fn basic() {
    let context = SimplifyContext::builder()
        .with_schema(schema())
        .with_query_execution_start_time(Some(Utc::now()))
        .build();

    // The `Expr` is a core concept in DataFusion, and DataFusion can
    // help simplify it.

    // For example 'a < (2 + 3)' can be rewritten into the easier to
    // optimize form `a < 5` automatically
    let expr = col("a").lt(lit(2i32) + lit(3i32));

    let simplifier = ExprSimplifier::new(context);
    let simplified = simplifier.simplify(expr).unwrap();
    assert_eq!(simplified, col("a").lt(lit(5i32)));
}

#[test]
fn fold_and_simplify() {