Enum datafusion::common::ParamValues

pub enum ParamValues {
    List(Vec<ScalarValue>),
    Map(HashMap<String, ScalarValue>),
}

The parameter value corresponding to the placeholder

Variants

List(Vec<ScalarValue>)

For positional query parameters, like SELECT * FROM test WHERE a > $1 AND b = $2

Map(HashMap<String, ScalarValue>)

For named query parameters, like SELECT * FROM test WHERE a > $foo AND b = $goo

Implementations

impl ParamValues

pub fn verify(&self, expect: &[DataType]) -> Result<(), DataFusionError>

Verify parameter list length and type

pub fn get_placeholders_with_values( &self, id: &str ) -> Result<ScalarValue, DataFusionError>

Trait Implementations

impl Clone for ParamValues

fn clone(&self) -> ParamValues

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ParamValues

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

Formats the value using the given formatter.

impl<K> From<HashMap<K, ScalarValue>> for ParamValues

where K: Into<String>,

fn from(value: HashMap<K, ScalarValue>) -> ParamValues

Converts to this type from the input type.

impl<K> From<Vec<(K, ScalarValue)>> for ParamValues

where K: Into<String>,

fn from(value: Vec<(K, ScalarValue)>) -> ParamValues

Converts to this type from the input type.

impl From<Vec<ScalarValue>> for ParamValues

fn from(value: Vec<ScalarValue>) -> ParamValues

Converts to this type from the input type.