query::dist_plan::analyzer

Struct PlanRewriter

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struct PlanRewriter {
    level: usize,
    stack: Vec<(LogicalPlan, usize)>,
    stage: Vec<LogicalPlan>,
    status: RewriterStatus,
    partition_cols: Option<Vec<String>>,
    column_requirements: HashSet<Column>,
    expand_on_next_call: bool,
    new_child_plan: Option<LogicalPlan>,
}

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§level: usize

Current level in the tree

§stack: Vec<(LogicalPlan, usize)>

Simulated stack for the rewrite recursion

§stage: Vec<LogicalPlan>

Stages to be expanded, will be added as parent node of merge scan one by one

§status: RewriterStatus§partition_cols: Option<Vec<String>>

Partition columns of the table in current pass

§column_requirements: HashSet<Column>§expand_on_next_call: bool§new_child_plan: Option<LogicalPlan>

Implementations§

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impl PlanRewriter

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fn get_parent(&self) -> Option<&LogicalPlan>

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fn should_expand(&mut self, plan: &LogicalPlan) -> bool

Return true if should stop and expand. The input plan is the parent node of current node

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fn update_column_requirements(&mut self, plan: &LogicalPlan)

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fn is_expanded(&self) -> bool

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fn set_expanded(&mut self)

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fn set_unexpanded(&mut self)

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fn maybe_set_partitions(&mut self, plan: &LogicalPlan)

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fn pop_stack(&mut self)

pop one stack item and reduce the level by 1

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fn expand(&mut self, on_node: LogicalPlan) -> DfResult<LogicalPlan>

Trait Implementations§

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impl Debug for PlanRewriter

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

Formats the value using the given formatter. Read more
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impl Default for PlanRewriter

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fn default() -> PlanRewriter

Returns the “default value” for a type. Read more
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impl TreeNodeRewriter for PlanRewriter

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fn f_down<'a>(&mut self, node: Self::Node) -> DfResult<Transformed<Self::Node>>

descend

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fn f_up(&mut self, node: Self::Node) -> DfResult<Transformed<Self::Node>>

ascend

Besure to call pop_stack before returning

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type Node = LogicalPlan

The node type which is rewritable.

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