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Update elementId() #831

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merged 3 commits into from
Jan 11, 2024
Merged

Update elementId() #831

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2b76af9
add elementId to main index page and add example using it for relatio…
JPryce-Aklundh Jan 10, 2024
d516fb8
fix variables
JPryce-Aklundh Jan 10, 2024
118f5dc
add links to elementid
JPryce-Aklundh Jan 11, 2024
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6 changes: 6 additions & 0 deletions modules/ROOT/pages/functions/index.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,12 @@ label:new[Introduced in 5.13]
| `coalesce(input :: ANY) :: ANY`
| Returns the first non-null value in a list of expressions.

1.2+| xref::functions/scalar.adoc#functions-elementid[`elementId()`]
| `elementId(input :: NODE) :: STRING`
| Returns a node identifier, unique within a specific transaction and DBMS.
| `elementId(input :: RELATIONSHIP) :: STRING`
| Returns a relationship identifier, unique within a specific transaction and DBMS.

1.1+| xref::functions/scalar.adoc#functions-endnode[`endNode()`]
| `endNode(input :: RELATIONSHIP) :: NODE`
| Returns the end `NODE` of a `RELATIONSHIP`.
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54 changes: 29 additions & 25 deletions modules/ROOT/pages/functions/scalar.adoc
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Expand Up @@ -282,46 +282,50 @@ elementId(expression)
|===


.+elementId()+
.+elementId() for nodes+
======

////
CREATE
(alice:Developer {name:'Alice', age: 38, eyes: 'brown'}),
(bob {name: 'Bob', age: 25, eyes: 'blue'}),
(charlie {name: 'Charlie', age: 53, eyes: 'green'}),
(daniel {name: 'Daniel', age: 54, eyes: 'brown'}),
(eskil {name: 'Eskil', age: 41, eyes: 'blue', liked_colors: ['pink', 'yellow', 'black']}),
(alice)-[:KNOWS]->(bob),
(alice)-[:KNOWS]->(charlie),
(bob)-[:KNOWS]->(daniel),
(charlie)-[:KNOWS]->(daniel),
(bob)-[:MARRIED]->(eskil)
////

.Query
[source, cypher]
----
MATCH (a)
RETURN elementId(a)
MATCH (n:Developer)
RETURN elementId(n)
----

The node identifier for each of the nodes is returned.
The identifier for each `Developer` node is returned.

.Result
[role="queryresult",options="header,footer",cols="1*<m"]
|===
| +elementId(a)+
| +"4:c0a65d96-4993-4b0c-b036-e7ebd9174905:0"+
| +"4:c0a65d96-4993-4b0c-b036-e7ebd9174905:1"+
| +"4:c0a65d96-4993-4b0c-b036-e7ebd9174905:2"+
| +"4:c0a65d96-4993-4b0c-b036-e7ebd9174905:3"+
| +"4:c0a65d96-4993-4b0c-b036-e7ebd9174905:4"+
1+d|Rows: 5
| +elementId(n)+
| "4:d8d172ec-96d8-4364-8f5d-9353d776aeb3:0"
1+d|Rows: 1
|===

======

.+elementId() for relationships+
======

.Query
[source, cypher]
----
MATCH (:Developer)-[r]-()
RETURN elementId(r)
----

The identifier for each relationship connected to a `Developer` node is returned.

.Result
[role="queryresult",options="header,footer",cols="1*<m"]
|===
| +elementId(r)+
| "5:d8d172ec-96d8-4364-8f5d-9353d776aeb3:0"
| "5:d8d172ec-96d8-4364-8f5d-9353d776aeb3:1"
1+d|Rows: 2
|===

======

[[functions-endnode]]
== endNode()
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