GQL data types

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

Graph data types list

Name	Summary
Graph element type	An element in a property graph. Can be a `GRAPH_NODE` or `GRAPH_EDGE` . SQL type name: `GRAPH_ELEMENT`
Graph path type	A path in a property graph. SQL type name: `GRAPH_PATH`

Graph element type

Name	Description
`GRAPH_ELEMENT`	An element in a property graph.

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.

Example

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

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

In the following example, the TYPEOF function is used to inspect the set of properties defined in the graph element type.

  GRAPH 
  
 graph_db 
 . 
 FinGraph 
 MATCH 
  
 ( 
 n 
 : 
 Person 
 ) 
 RETURN 
  
 TYPEOF 
 ( 
 n 
 ) 
  
 AS 
  
 t 
 LIMIT 
  
 1 
 /*--------------------------------------------------------+ 
 | t                                                      | 
 +--------------------------------------------------------+ 
 | GRAPH_NODE(myproject.graph_db.FinGraph)<id INT64, ...> | 
 +--------------------------------------------------------*/

Graph path type

Name	Description
`GRAPH_PATH`	A path in a property graph.

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

  GRAPH_PATH<NODE_TYPE 
 , 
  
 EDGE_TYPE 
>