fn plan_collate(
ecx: &ExprContext<'_>,
expr: &Expr<Aug>,
collation: &UnresolvedItemName,
) -> Result<CoercibleScalarExpr, PlanError>
fn plan_collate(
ecx: &ExprContext<'_>,
expr: &Expr<Aug>,
collation: &UnresolvedItemName,
) -> Result<CoercibleScalarExpr, PlanError>