Function mz_sql::plan::query::plan_case

fn plan_case<'a>(
    ecx: &ExprContext<'_>,
    operand: &'a Option<Box<Expr<Aug>>>,
    conditions: &'a [Expr<Aug>],
    results: &'a [Expr<Aug>],
    else_result: &'a Option<Box<Expr<Aug>>>
) -> Result<HirScalarExpr, PlanError>