Struct datafusion_sql::planner::PlannerContext

pub struct PlannerContext {
    pub prepare_param_data_types: Vec<DataType>,
    pub ctes: HashMap<String, LogicalPlan>,
    pub outer_query_schema: Option<DFSchema>,
}

Struct to store the states used by the Planner. The Planner will leverage the states to resolve CTEs, Views, subqueries and PREPARE statements. The states include Common Table Expression (CTE) provided with WITH clause and Parameter Data Types provided with PREPARE statement and the query schema of the outer query plan

Fields

prepare_param_data_types: Vec<DataType>

Data type provided with prepare statement

ctes: HashMap<String, LogicalPlan>

Map of CTE name to logical plan of the WITH clause

outer_query_schema: Option<DFSchema>

The query schema of the outer query plan, used to resolve the columns in subquery

Implementations

impl PlannerContext

pub fn new() -> Self

Create an empty PlannerContext

pub fn new_with_prepare_param_data_types( prepare_param_data_types: Vec<DataType> ) -> Self

Create a new PlannerContext with provided prepare_param_data_types

Trait Implementations

impl Clone for PlannerContext

fn clone(&self) -> PlannerContext

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PlannerContext

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

Formats the value using the given formatter.

impl Default for PlannerContext

fn default() -> Self

Returns the “default value” for a type.