Struct LogicalMaxOneRow

pub struct LogicalMaxOneRow {
    pub base: PlanBase<Logical>,
    pub(super) core: MaxOneRow<PlanRef>,
}

LogicalMaxOneRow fetches up to one row from the input, returning an error if the input contains more than one row at runtime. Only available in batch mode.

Fields

base: PlanBase<Logical>

core: MaxOneRow<PlanRef>

Implementations

impl LogicalMaxOneRow

fn new(core: MaxOneRow<PlanRef>) -> Self

pub fn create(input: PlanRef) -> PlanRef

Methods from Deref<Target = PlanBase<Logical>>

pub fn clone_with_new_plan_id(&self) -> Self

pub fn clone_with_new_distribution(&self, dist: Distribution) -> Self

Clone the plan node with a new distribution.

Panics if the plan node is not physical.

Trait Implementations

impl Clone for LogicalMaxOneRow

fn clone(&self) -> LogicalMaxOneRow

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl ColPrunable for LogicalMaxOneRow

fn prune_col( &self, required_cols: &[usize], ctx: &mut ColumnPruningContext, ) -> PlanRef

Transform the plan node to only output the required columns ordered by index number.

impl Debug for LogicalMaxOneRow

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for LogicalMaxOneRow

type Target = PlanBase<Logical>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Distill for LogicalMaxOneRow

fn distill<'a>(&self) -> XmlNode<'a>

fn distill_to_string(&self) -> String

impl ExprRewritable for LogicalMaxOneRow

fn has_rewritable_expr(&self) -> bool

fn rewrite_exprs(&self, _r: &mut dyn ExprRewriter) -> PlanRef

impl ExprVisitable for LogicalMaxOneRow

fn visit_exprs(&self, _v: &mut dyn ExprVisitor)

impl Hash for LogicalMaxOneRow

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for LogicalMaxOneRow

fn eq(&self, other: &LogicalMaxOneRow) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PlanNodeMeta for LogicalMaxOneRow

const NODE_TYPE: PlanNodeType = PlanNodeType::LogicalMaxOneRow

type Convention = Logical

fn plan_base(&self) -> &PlanBase<Logical>

Get the reference to the PlanBase with corresponding convention.

fn plan_base_ref(&self) -> PlanBaseRef<'_>

Get the reference to the PlanBase with erased convention.

impl PlanTreeNode for LogicalMaxOneRow

fn clone_with_inputs(&self, inputs: &[PlanRef]) -> PlanRef

Clone the node with a list of new inputs.

fn inputs(&self) -> SmallVec<[PlanRef; 2]>

Get input nodes of the plan.

impl PlanTreeNodeUnary for LogicalMaxOneRow

fn input(&self) -> PlanRef

fn clone_with_input(&self, input: PlanRef) -> Self

fn rewrite_with_input( &self, input: PlanRef, input_col_change: ColIndexMapping, ) -> (Self, ColIndexMapping)

Rewrites the plan node according to the schema change of its input node during rewriting.

impl PredicatePushdown for LogicalMaxOneRow

fn predicate_pushdown( &self, predicate: Condition, ctx: &mut PredicatePushdownContext, ) -> PlanRef

Push predicate down for every logical plan node.

impl ToBatch for LogicalMaxOneRow

fn to_batch(&self) -> Result<PlanRef, RwError>

to_batch is equivalent to to_batch_with_order_required(&Order::any())

fn to_batch_with_order_required( &self, required_order: &Order, ) -> Result<PlanRef, RwError>

convert the plan to batch physical plan and satisfy the required Order

impl ToDistributedBatch for LogicalMaxOneRow

fn to_distributed(&self) -> Result<PlanRef, RwError>

to_distributed is equivalent to to_distributed_with_required(&Order::any(), &RequiredDist::Any)

fn to_distributed_with_required( &self, required_order: &Order, required_dist: &RequiredDist, ) -> Result<PlanRef, RwError>

insert the exchange in batch physical plan to satisfy the required Distribution and Order.

impl ToLocalBatch for LogicalMaxOneRow

fn to_local(&self) -> Result<PlanRef, RwError>

fn to_local_with_order_required( &self, required_order: &Order, ) -> Result<PlanRef, RwError>

Convert the plan to batch local physical plan and satisfy the required Order

impl ToStream for LogicalMaxOneRow

fn to_stream(&self, _ctx: &mut ToStreamContext) -> Result<PlanRef, RwError>

to_stream is equivalent to to_stream_with_dist_required(RequiredDist::Any)

fn logical_rewrite_for_stream( &self, ctx: &mut RewriteStreamContext, ) -> Result<(PlanRef, ColIndexMapping), RwError>

logical_rewrite_for_stream will rewrite the logical node, and return (new_plan_node, col_mapping), the col_mapping is for original columns have been changed into some other position.

fn to_stream_with_dist_required( &self, required_dist: &RequiredDist, ctx: &mut ToStreamContext, ) -> Result<PlanRef, RwError>

convert the plan to streaming physical plan and satisfy the required distribution

impl TryToBatchPb for LogicalMaxOneRow

fn try_to_batch_prost_body(&self) -> Result<NodeBody, SchedulerError>

impl TryToStreamPb for LogicalMaxOneRow

fn try_to_stream_prost_body( &self, _state: &mut BuildFragmentGraphState, ) -> Result<NodeBody, SchedulerError>

impl Eq for LogicalMaxOneRow

impl PlanNode for LogicalMaxOneRow

impl StructuralPartialEq for LogicalMaxOneRow

impl ToPb for LogicalMaxOneRow