GQL data types

Graph Query Language (GQL) supports all GoogleSQL data types , including the following GQL-specific data type:

Graph data types list

Graph element type

A variable with a GRAPH_ELEMENT type is produced by a graph query. The generated type has this format:

  GRAPH_ELEMENT<T> 
 

A graph element is either a node or an edge, representing data from a matching node or edge table based on its label. Each graph element holds a set of properties that can be accessed with a case-insensitive name, similar to fields of a struct.

Graph elements with dynamic properties enabled can store properties beyond those defined in the schema. A schema change isn't needed to manage dynamic properties because the property names and values are based on the input column's values. You can access dynamic properties with their names in the same way as defined properties. For information about how to model dynamic properties, see dynamic properties definition .

If a property isn't defined in the schema, accessing it through the field-access-operator returns the JSON type if the dynamic property exists, or NULL if the property doesn't exist.

Example

In the following example, n represents a graph element in the FinGraph property graph:

  GRAPH 
  
 FinGraph 
 MATCH 
  
 ( 
 n 
 : 
 Person 
 ) 
 RETURN 
  
 n 
 . 
 name 
 

Graph path type

The graph path data type represents a sequence of nodes interleaved with edges and has this format:

  GRAPH_PATH<NODE_TYPE 
 , 
  
 EDGE_TYPE 
> 

You can construct a graph path with the PATH function or when you create a path variable in a graph pattern.