Feature overview-GraphCompute(GraphCompute)-阿里云帮助中心

Definitions

Entity: An operation that queries vertices or edges.
map: Maps input objects to other objects based on a specific rule.
filter: Filters input objects based on a specific rule.
sideEffect: Adds information to input objects based on a specific rule and outputs the same objects.
branch: Performs branch calculations on input objects.
Modifier: Modifies a single step and is typically used to provide parameters for the step.
Function: Provides a function for a single step, such as a comparison function for a filter step.
Policy: A customizable policy that users can select.

Feature overview

Note: Steps marked with [*] are proprietary extensions developed by iGraph. All other steps are open source steps from Apache Gremlin.

Type	Step name	Feature
Entity	E	Queries edge information.
	inV	Traverses from an edge to an associated vertex.
	out	Traverses from a vertex to an associated vertex.
	outE	Traverses from a vertex to an associated edge.
	V	Queries vertex information.
map	barrier	Blocks.
	bulk	Returns the bulk value of an entity.
	cap	Returns the stored value of a sideEffect.
	constant	Returns a user-defined value.
	count	Calculates the count.
	fold	Aggregates input objects into a list<object>.
	group	Groups.
	groupCount	Groups and calculates the count within each group.
	identity	Returns the input itself.
	label	Returns the table name or graph label.
	loops	Returns the number of current loops.
	math	Scientific computing
	max	Calculates the maximum value.
	mean	Calculates the average value.
	min	Calculates the minimum value.
	order	Sorts.
	path	Returns the traversal path.
	project	Maps input objects to a map<string,object>.
	properties	Returns field names and field values.
	propertyMap	Returns a map of field names and field values.
	sack	Returns the sack value of an entity.
	select	Returns tag values.
	sum	Calculates the sum.
	unfold	Expands a list<object> into objects.
	values	Returns field values.
filter	and	Returns the input if all sub-traversals produce a result.
	cap	Returns paths that contain a cycle.
	dedup	Removes duplicates.
	distinct [*]	Discretizes.
	has	Filters entities.
	hasKey	Filters by field name.
	hasLabel	Filters by label.
	hasValue	Filters by field value.
	is	Filters by number or string.
	limit	Truncates and keeps the first results.
	not	Returns the input if the sub-traversal does not produce a result.
	or	Returns the input if at least one sub-traversal produces a result.
	range	Truncates.
	sample	Sampling
	simplePath	Returns paths without cycles.
	tail	Truncates and keeps the last results.
	where	Filters.
sideEffect	aggregate	Copies input objects to a list<object> in a blocking manner.
	alias [*]	Defines virtual fields for input entities (vertices or edges).
	fields [*]	Clipping field
	store	Copies input objects to a list<object> in a non-blocking manner.
branch	branch	Performs a branch query.
	choose	Querying branches
	coalesce	Returns the computed value from the first input that can compute at least one element.
	local	Executes a sub-traversal for each input individually.
	optional	If the sub-traversal produces a result, returns the traversal result. Otherwise, returns the input.
	repeat	Performs a loop traversal.
	union	Merges the results of sub-traversals.
Modifier	as	Annotates.
	by	Provides parameters for other steps.
	emit	Records the intermediate results of a loop.
	indexQuery [*]	Performs an inverted index query.
	option	Specifies the condition for a branch query.
	times	Specifies the number of loop traversals.
	until	Specifies the stop condition for a loop traversal.
	withSack	Defines the initial value, split rule, and merge rule for the sack value of an entity.
Function	P	Describes comparison logic.
	T	Fetches information from input elements.
	UDF [*]	Supports user-defined comparison functions.
Policy	withStrategies	Adds custom policies to a traversal.
	PathRecordStrategy	Customizes the information type for path records.
	PushDownStrategy	Specifies that the step that gets the sideEffect is pushed down to the storage layer for execution.