Struct ColumnExistsRule 

pub struct ColumnExistsRule { /* private fields */ }

Rule that checks if a column exists in the schema

Implementations

impl ColumnExistsRule

pub fn new(column_name: String) -> Self

Creates a new ColumnExistsRule

Arguments

• column_name - The name of the column to check for existence

Trait Implementations

impl Clone for ColumnExistsRule

fn clone(&self) -> ColumnExistsRule

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnExistsRule

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

Formats the value using the given formatter.

impl Default for ColumnExistsRule

fn default() -> ColumnExistsRule

Returns the “default value” for a type.

impl SchemaRule for ColumnExistsRule

fn validate_schema(&self, schema: &DFSchema) -> Result<bool, ValidationError>

Validate the schema

fn name(&self) -> &str

Get the name of the rule

fn description(&self) -> &str

Get the description of the rule

fn validate_schema_with_ruleset( &self, schema: &DFSchema, _rule_set: &RuleSet, ) -> Result<bool, ValidationError>

Validate the schema with access to the RuleSet