Struct Catalog 

pub struct Catalog { /* private fields */ }

The database’s schema dictionary - maps names to compact internal IDs.

You rarely interact with this directly. The query processor uses it to resolve names like “Person” and “name” to internal IDs.

Implementations

impl Catalog

pub fn new() -> Self

Creates a new empty catalog.

pub fn with_schema() -> Self

Creates a new catalog with schema constraints enabled.

pub fn get_or_create_label(&self, name: &str) -> LabelId

Gets or creates a label ID for the given label name.

pub fn get_label_id(&self, name: &str) -> Option<LabelId>

Gets the label ID for a label name, if it exists.

pub fn get_label_name(&self, id: LabelId) -> Option<Arc<str>>

Gets the label name for a label ID, if it exists.

pub fn label_count(&self) -> usize

Returns the number of distinct labels.

pub fn all_labels(&self) -> Vec<Arc<str>>

Returns all label names.

pub fn get_or_create_property_key(&self, name: &str) -> PropertyKeyId

Gets or creates a property key ID for the given property key name.

pub fn get_property_key_id(&self, name: &str) -> Option<PropertyKeyId>

Gets the property key ID for a property key name, if it exists.

pub fn get_property_key_name(&self, id: PropertyKeyId) -> Option<Arc<str>>

Gets the property key name for a property key ID, if it exists.

pub fn property_key_count(&self) -> usize

Returns the number of distinct property keys.

pub fn all_property_keys(&self) -> Vec<Arc<str>>

Returns all property key names.

pub fn get_or_create_edge_type(&self, name: &str) -> EdgeTypeId

Gets or creates an edge type ID for the given edge type name.

pub fn get_edge_type_id(&self, name: &str) -> Option<EdgeTypeId>

Gets the edge type ID for an edge type name, if it exists.

pub fn get_edge_type_name(&self, id: EdgeTypeId) -> Option<Arc<str>>

Gets the edge type name for an edge type ID, if it exists.

pub fn edge_type_count(&self) -> usize

Returns the number of distinct edge types.

pub fn all_edge_types(&self) -> Vec<Arc<str>>

Returns all edge type names.

pub fn create_index( &self, label: LabelId, property_key: PropertyKeyId, index_type: IndexType, ) -> IndexId

Creates a new index on a label and property key.

pub fn drop_index(&self, id: IndexId) -> bool

Drops an index by ID.

pub fn get_index(&self, id: IndexId) -> Option<IndexDefinition>

Gets the index definition for an index ID.

pub fn indexes_for_label(&self, label: LabelId) -> Vec<IndexId>

Finds indexes for a given label.

pub fn indexes_for_label_property( &self, label: LabelId, property_key: PropertyKeyId, ) -> Vec<IndexId>

Finds indexes for a given label and property key.

pub fn index_count(&self) -> usize

Returns the number of indexes.

pub fn has_schema(&self) -> bool

Returns whether schema constraints are enabled.

pub fn add_unique_constraint( &self, label: LabelId, property_key: PropertyKeyId, ) -> Result<(), CatalogError>

Adds a uniqueness constraint.

Returns an error if schema is not enabled or constraint already exists.

pub fn add_required_property( &self, label: LabelId, property_key: PropertyKeyId, ) -> Result<(), CatalogError>

Adds a required property constraint (NOT NULL).

Returns an error if schema is not enabled or constraint already exists.

pub fn is_property_required( &self, label: LabelId, property_key: PropertyKeyId, ) -> bool

Checks if a property is required for a label.

pub fn is_property_unique( &self, label: LabelId, property_key: PropertyKeyId, ) -> bool

Checks if a property must be unique for a label.

Trait Implementations

impl Default for Catalog

fn default() -> Self

Returns the “default value” for a type.