Struct Catalog 

pub struct Catalog { /* private fields */ }

The main database catalog.

Manages all metadata about the database schema including:

• Labels (node categories)
• Property keys (property names)
• Edge types (relationship types)
• Index definitions

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.