Function optimize_mir_constant

src/adapter/src/optimize.rs:483–495

(
    expr: MirRelationExpr,
    ctx: &mut TransformCtx,
    limit: bool,
)

/// running it, and tracing the result plan.
#[mz_ore::instrument(target = "optimizer", level = "debug", name = "constant")]
fn optimize_mir_constant(
    expr: MirRelationExpr,
    ctx: &mut TransformCtx,
    limit: bool,
) -> Result<MirRelationExpr, OptimizerError> {
    let optimizer = mz_transform::Optimizer::constant_optimizer(ctx, limit);
    let expr = optimizer.optimize(expr, ctx)?;

    // Trace the result of this phase.
    mz_repr::explain::trace_plan(expr.as_inner());

    Ok::<_, OptimizerError>(expr.0)
}

macro_rules! trace_plan {
    (at: $span:literal, $plan:expr) => {