Trait datafusion_physical_expr::var_provider::VarProvider

pub trait VarProvider: Debug {
    // Required methods
    fn get_value(&self, var_names: Vec<String>) -> Result<ScalarValue>;
    fn get_type(&self, var_names: &[String]) -> Option<DataType>;
}

A var provider for @variable and @@variable runtime values.

Required Methods

fn get_value(&self, var_names: Vec<String>) -> Result<ScalarValue>

Get variable value

fn get_type(&self, var_names: &[String]) -> Option<DataType>

Return the type of the given variable

Implementors