Enum QueryLanguage 

pub enum QueryLanguage {
    Cypher,
    GQL,
}

Query language for continuous queries

Drasi supports two query languages for continuous query processing:

Query Languages

• Cypher: Default graph query language with pattern matching
• GQL: GraphQL-style queries compiled to Cypher

Default Behavior

If not specified, queries default to QueryLanguage::Cypher.

Examples

Using Cypher (Default)

queries:
  - id: active_orders
    query: "MATCH (o:Order) WHERE o.status = 'active' RETURN o"
    queryLanguage: Cypher  # Optional, this is the default
    sources: [orders_db]

Using GQL

queries:
  - id: user_data
    query: |
      {
        users(status: "active") {
          id
          name
          email
        }
      }
    queryLanguage: GQL
    sources: [users_db]

Important Limitations

Unsupported Clauses: ORDER BY, TOP, and LIMIT clauses are not supported in continuous queries as they conflict with incremental result computation.

Variants

Cypher

GQL

Trait Implementations

impl Clone for QueryLanguage

fn clone(&self) -> QueryLanguage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryLanguage

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

Formats the value using the given formatter.

impl Default for QueryLanguage

fn default() -> QueryLanguage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for QueryLanguage

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for QueryLanguage

fn eq(&self, other: &QueryLanguage) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for QueryLanguage

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for QueryLanguage