Trait datafusion::variable::VarProvider

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

A var provider for @variable

Required Methods

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

Get variable value

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

Return the type of the given variable

Implementors