Trait RelationPlannerContext 

pub trait RelationPlannerContext {
    // Required methods
    fn context_provider(&self) -> &dyn ContextProvider;
    fn plan(&mut self, relation: TableFactor) -> Result<LogicalPlan>;
    fn sql_to_expr(&mut self, expr: SQLExpr, schema: &DFSchema) -> Result<Expr>;
    fn sql_expr_to_logical_expr(
        &mut self,
        expr: SQLExpr,
        schema: &DFSchema,
    ) -> Result<Expr>;
    fn normalize_ident(&self, ident: Ident) -> String;
    fn object_name_to_table_reference(
        &self,
        name: ObjectName,
    ) -> Result<TableReference>;
}

Available on crate feature sql only.

Provides utilities for relation planners to interact with DataFusion’s SQL planner.

This trait provides SQL planning utilities specific to relation planning, such as converting SQL expressions to logical expressions and normalizing identifiers. It uses composition to provide access to session context via ContextProvider.

Required Methods

fn context_provider(&self) -> &dyn ContextProvider

Provides access to the underlying context provider for reading session configuration, accessing tables, functions, and other metadata.

fn plan(&mut self, relation: TableFactor) -> Result<LogicalPlan>

Plans the specified relation through the full planner pipeline, starting from the first registered relation planner.

fn sql_to_expr(&mut self, expr: SQLExpr, schema: &DFSchema) -> Result<Expr>

Converts a SQL expression into a logical expression using the current planner context.

fn sql_expr_to_logical_expr( &mut self, expr: SQLExpr, schema: &DFSchema, ) -> Result<Expr>

Converts a SQL expression into a logical expression without DataFusion rewrites.

fn normalize_ident(&self, ident: Ident) -> String

Normalizes an identifier according to session settings.

fn object_name_to_table_reference( &self, name: ObjectName, ) -> Result<TableReference>

Normalizes a SQL object name into a TableReference.

Implementors