fn plan_select_inner(
scx: &StatementContext<'_>,
select: SelectStatement<Aug>,
params: &Params,
copy_to: Option<CopyFormat>,
) -> Result<(SelectPlan, RelationDesc), PlanError>
fn plan_select_inner(
scx: &StatementContext<'_>,
select: SelectStatement<Aug>,
params: &Params,
copy_to: Option<CopyFormat>,
) -> Result<(SelectPlan, RelationDesc), PlanError>