union
Merge the results of several traversals.
Synopsis
union(traversal, ... )| Syntax conventions | Description |
|---|---|
| Lowercase and uppercase | Literal keyword. Includes (). |
Italics |
Variable value. Replace with a user-defined value. |
[] |
Optional. Square brackets ( [] ) surround
optional command arguments. Do not type the square brackets. |
{} |
Group. Braces ( {} ) identify a group to choose
from. Do not type the braces. |
| |
Or. A vertical bar ( | ) separates alternative
elements. Type any one of the elements. Do not type the vertical
bar. |
... |
Repeatable. An ellipsis ( ... ) indicates that
you can repeat the syntax element as often as required. |
Description
The union() step is a branch step
and merges the results of an arbitrary number of traversals that are specified.
Examples
Recipes reviewed by John Smith and the people he
knows:
g.V().has('person','name','John Smith').union(out('reviewed'), both('knows').out('reviewed')).dedup()