Struct PushdownChecker 

struct PushdownChecker<'schema> {
    non_primitive_columns: bool,
    projected_columns: bool,
    required_columns: BTreeSet<usize>,
    table_schema: &'schema Schema,
}

Fields

non_primitive_columns: bool

Does the expression require any non-primitive columns (like structs)?

projected_columns: bool

Does the expression reference any columns that are in the table schema but not in the file schema? This includes partition columns and projected columns.

required_columns: BTreeSet<usize>

table_schema: &'schema Schema

Implementations

impl<'schema> PushdownChecker<'schema>

fn new(table_schema: &'schema Schema) -> Self

fn check_single_column( &mut self, column_name: &str, ) -> Option<TreeNodeRecursion>

fn prevents_pushdown(&self) -> bool

fn check(&mut self, node: Arc<dyn PhysicalExpr>) -> Result<TreeNodeRecursion>

Trait Implementations

impl TreeNodeVisitor<'_> for PushdownChecker<'_>

type Node = Arc<dyn PhysicalExpr>

The node type which is visitable.

fn f_down(&mut self, node: &Self::Node) -> Result<TreeNodeRecursion>

Invoked while traversing down the tree, before any children are visited. Default implementation continues the recursion.

fn f_up( &mut self, _node: &'n Self::Node, ) -> Result<TreeNodeRecursion, DataFusionError>

Invoked while traversing up the tree after children are visited. Default implementation continues the recursion.