Struct QueryInputs 

pub struct QueryInputs { /* private fields */ }

Define the inputs to a query. This is in two parts: a set of values known now, and a set of types known now. The separate map of types is to allow queries to be algebrized without full knowledge of the bindings that will be used at execution time. When built correctly, types is guaranteed to contain the types of values – use QueryInputs::new or QueryInputs::with_values to construct an instance.

Implementations

impl QueryInputs

pub fn with_value_sequence(vals: Vec<(Variable, TypedValue)>) -> QueryInputs

pub fn with_type_sequence(types: Vec<(Variable, ValueType)>) -> QueryInputs

pub fn with_values(values: BTreeMap<Variable, TypedValue>) -> QueryInputs

pub fn with_collection(var: Variable, values: Vec<TypedValue>) -> QueryInputs

Bind a single variable to a collection of values (:in $ [?x ...]).

pub fn with_tuple(vars: Vec<Variable>, values: Vec<TypedValue>) -> QueryInputs

Bind several variables to one row of values (:in $ [?a ?b]).

pub fn with_relation( vars: Vec<Variable>, rows: Vec<Vec<TypedValue>>, ) -> QueryInputs

Bind several variables to a table of rows (:in $ [[?a ?b]]).

pub fn merge(self, other: QueryInputs) -> Result<QueryInputs, AlgebrizerError>

Combine two sets of inputs, e.g. scalars from with_value_sequence plus a collection from with_collection, for :in ?name [?x ...]. Fails if a variable is bound by both, or bound twice with different types.

pub fn new( types: BTreeMap<Variable, ValueType>, values: BTreeMap<Variable, TypedValue>, ) -> Result<QueryInputs, AlgebrizerError>

Trait Implementations

impl Default for QueryInputs

fn default() -> QueryInputs

Returns the “default value” for a type.