Struct CastExpr 

pub struct CastExpr { /* private fields */ }

CAST expression (CAST(column AS type))

Implementations

impl CastExpr

pub fn new(column: impl Into<String>, target_type: DataType) -> Self

Create a new CAST expression

pub fn target_type(&self) -> DataType

Get the target type

pub fn perform_cast(&self, value: &Value) -> Result<Value>

Perform the cast operation on a value

Trait Implementations

impl Clone for CastExpr

fn clone(&self) -> CastExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CastExpr

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

Formats the value using the given formatter.

impl Expression for CastExpr

fn as_any(&self) -> &dyn Any

Get a reference to the expression as Any for downcasting

fn evaluate(&self, row: &Row) -> Result<bool>

Evaluate the expression against a row

fn evaluate_fast(&self, row: &Row) -> bool

Fast evaluation without detailed error handling

fn with_aliases( &self, aliases: &FxHashMap<String, String>, ) -> Box<dyn Expression>

Create a copy of this expression with column aliases resolved

fn prepare_for_schema(&mut self, schema: &Schema)

Prepare the expression for a specific schema

fn is_prepared(&self) -> bool

Check if this expression has been prepared for a schema

fn get_column_name(&self) -> Option<&str>

Get the column name this expression operates on (if single column)

fn clone_box(&self) -> Box<dyn Expression>

Clone the expression into a boxed trait object

fn can_use_index(&self) -> bool

Check if this expression can potentially use an index

fn get_comparison_info(&self) -> Option<(&str, Operator, &Value)>

Extract equality comparison info for index lookups

fn get_and_operands(&self) -> Option<&[Box<dyn Expression>]>

Get child expressions if this is an AND expression

fn get_or_operands(&self) -> Option<&[Box<dyn Expression>]>

Get child expressions if this is an OR expression

fn get_like_prefix_info(&self) -> Option<(&str, String, bool)>

Get LIKE prefix info for index range scanning

fn collect_comparisons(&self) -> Vec<(&str, Operator, &Value)>

Collect all simple comparisons from this expression tree

fn is_unknown_due_to_null(&self, _row: &Row) -> bool

Check if the expression result would be UNKNOWN (NULL) for this row