Struct datafusion_optimizer::simplify_expressions::SimplifyContext

pub struct SimplifyContext<'a> { /* private fields */ }

Provides simplification information based on DFSchema and ExecutionProps. This is the default implementation used by DataFusion

Example

See the simplify_demo in the expr_api example

Implementations

impl<'a> SimplifyContext<'a>

pub fn new(props: &'a ExecutionProps) -> SimplifyContext<'a>

Create a new SimplifyContext

pub fn with_schema(self, schema: Arc<DFSchema>) -> SimplifyContext<'a>

Register a DFSchemaRef with this context

Trait Implementations

impl<'a> Clone for SimplifyContext<'a>

fn clone(&self) -> SimplifyContext<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for SimplifyContext<'a>

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

Formats the value using the given formatter.

impl<'a> SimplifyInfo for SimplifyContext<'a>

fn is_boolean_type(&self, expr: &Expr) -> Result<bool, DataFusionError>

returns true if this Expr has boolean type

fn nullable(&self, expr: &Expr) -> Result<bool, DataFusionError>

Returns true if expr is nullable

fn get_data_type(&self, expr: &Expr) -> Result<DataType, DataFusionError>

Returns data type of this expr needed for determining optimized int type of a value

fn execution_props(&self) -> &ExecutionProps

Returns details needed for partial expression evaluation