Function plan_index_list

src/sql/src/plan/query.rs:4461–4498

(
    ecx: &ExprContext,
    expr: HirScalarExpr,
    indexes: &[&Expr<Aug>],
    n_layers: usize,
    elem_type_name: &str,
)

}

fn plan_index_list(
    ecx: &ExprContext,
    expr: HirScalarExpr,
    indexes: &[&Expr<Aug>],
    n_layers: usize,
    elem_type_name: &str,
) -> Result<(usize, HirScalarExpr), PlanError> {
    let depth = indexes.len();

    if depth > n_layers {
        if n_layers == 0 {
            sql_bail!("cannot subscript type {}", elem_type_name)
        } else {
            sql_bail!(
                "cannot index into {} layers; list only has {} layer{}",
                depth,
                n_layers,
                if n_layers == 1 { "" } else { "s" }
            )
        }
    }

    let mut exprs = Vec::with_capacity(depth + 1);
    exprs.push(expr);

    for i in indexes {
        exprs.push(plan_expr(ecx, i)?.cast_to(
            ecx,
            CastContext::Explicit,
            &SqlScalarType::Int64,
        )?);
    }

    Ok((
        n_layers - depth,
        HirScalarExpr::call_variadic(ListIndex, exprs),
    ))
}

fn plan_slice_list(
    ecx: &ExprContext,