Fixes #4263: Adds docs for apoc triggers helper functions

docs/asciidoc/modules/ROOT/examples/generated-documentation/apoc.trigger.nodesByLabel.adoc

@@ -1,5 +1,5 @@
 ¦xref::overview/apoc.trigger/apoc.trigger.nodesByLabel.adoc[apoc.trigger.nodesByLabel icon:book[]] +
 
-``
+`apoc.trigger.nodesByLabel(labelEntries, label)` - function to filter labelEntries by label, to be used within a trigger kernelTransaction with `$assignedLabels`, `$removedLabels`, `$assigned/removedNodeProperties`.
 ¦label:function[]
 ¦label:apoc-extended[]

docs/asciidoc/modules/ROOT/examples/generated-documentation/apoc.trigger.propertiesByKey.adoc

@@ -1,5 +1,5 @@
 ¦xref::overview/apoc.trigger/apoc.trigger.propertiesByKey.adoc[apoc.trigger.propertiesByKey icon:book[]] +
 
-``
+`apoc.trigger.propertiesByKey(propertyEntries, key)` - function to filter propertyEntries by property-key, to be used within a trigger kernelTransaction with `$assignedNode/RelationshipProperties` and `$removedNode/RelationshipProperties`. Returns [`old`,`new`,`key`,`node`,`relationship`].
 ¦label:function[]
 ¦label:apoc-extended[]

docs/asciidoc/modules/ROOT/examples/generated-documentation/apoc.trigger.toNode-lite.csv

@@ -0,0 +1,2 @@
+¦signature
+¦apoc.trigger.nodesByLabel(labelEntries :: ANY?, label :: STRING?) :: (LIST? OF ANY?)

docs/asciidoc/modules/ROOT/examples/generated-documentation/apoc.trigger.toNode.adoc

@@ -0,0 +1,5 @@
+¦xref::overview/apoc.trigger/apoc.trigger.toNode.adoc[apoc.trigger.toNode icon:book[]] +
+
+`apoc.trigger.toNode(node, removedLabels, removedNodeProperties)` - function to rebuild a node as a virtual, to be used in triggers with a not 'afterAsync' phase.
+¦label:function[]
+¦label:apoc-extended[]

docs/asciidoc/modules/ROOT/examples/generated-documentation/apoc.trigger.toNode.csv

@@ -0,0 +1,2 @@
+¦type¦qualified name¦signature¦description
+¦function¦apoc.trigger.nodesByLabel¦apoc.trigger.nodesByLabel(labelEntries :: ANY?, label :: STRING?) :: (LIST? OF ANY?)¦

docs/asciidoc/modules/ROOT/examples/generated-documentation/apoc.trigger.toRelationship-lite.csv

@@ -0,0 +1,2 @@
+¦signature
+¦apoc.trigger.nodesByLabel(labelEntries :: ANY?, label :: STRING?) :: (LIST? OF ANY?)

docs/asciidoc/modules/ROOT/examples/generated-documentation/apoc.trigger.toRelationship.adoc

@@ -0,0 +1,5 @@
+¦xref::overview/apoc.trigger/apoc.trigger.toRelationship.adoc[apoc.trigger.toRelationship icon:book[]] +
+
+`apoc.trigger.toRelationship(rel, removedRelationshipProperties)` - function to rebuild a relationship as a virtual, to be used in triggers with a not 'afterAsync' phase.
+¦label:function[]
+¦label:apoc-extended[]

docs/asciidoc/modules/ROOT/examples/generated-documentation/apoc.trigger.toRelationship.csv

@@ -0,0 +1,2 @@
+¦type¦qualified name¦signature¦description
+¦function¦apoc.trigger.nodesByLabel¦apoc.trigger.nodesByLabel(labelEntries :: ANY?, label :: STRING?) :: (LIST? OF ANY?)¦

docs/asciidoc/modules/ROOT/nav.adoc

@@ -79,6 +79,7 @@ include::partial$generated-documentation/nav.adoc[]
 
 * xref:background-operations/index.adoc[]
     ** xref::background-operations/apoc-load-directory-async.adoc[]
+    ** xref:background-operations/triggers.adoc[]
 
 * xref:database-introspection/index.adoc[]
     ** xref::database-introspection/config.adoc[]

docs/asciidoc/modules/ROOT/pages/background-operations/index.adoc

@@ -5,4 +5,5 @@
 
 It's possible to define listeners on one or more folders which trigger the executing of custom cypher queries if changes are observed:
 
-* xref::background-operations/apoc-load-directory-async.adoc[]
+* xref::background-operations/apoc-load-directory-async.adoc[]
+* xref:background-operations/triggers.adoc[]

docs/asciidoc/modules/ROOT/pages/background-operations/triggers.adoc

@@ -0,0 +1,16 @@
+APOC Core provides a set of procedures for running Cypher queries that are called when data in Neo4j is changed (created, updated, deleted).
+
+https://neo4j.com/docs/apoc/current/background-operations/triggers/[See here for more info].
+
+In addition, APOC Extended provides some helper procedures to more easily manipulate Cypher queries and solve some transaction use cases that cannot be solved otherwise.
+
+== Helper Functions
+
+[separator=¦,opts=header,cols="5,1m,1m"]
+|===
+¦Qualified Name¦Type¦Release
+include::example$generated-documentation/apoc.trigger.nodesByLabel.adoc[]
+include::example$generated-documentation/apoc.trigger.propertiesByKey.adoc[]
+include::example$generated-documentation/apoc.trigger.toNode.adoc[]
+include::example$generated-documentation/apoc.trigger.toRelationship.adoc[]
+|===

docs/asciidoc/modules/ROOT/pages/overview/apoc.dv/apoc.dv.catalog.add.adoc

@@ -5,7 +5,7 @@ This file is generated by DocsTest, so don't change it!
 = apoc.dv.catalog.add
 :description: This section contains reference documentation for the apoc.dv.catalog.add procedure.
 
-label:procedure[] label:apoc-extended[]
+label:procedure[] label:apoc-extended[] label:deprecated[]
 
 [.emphasis]
 Add a virtualized resource configuration
@@ -17,6 +17,8 @@ Add a virtualized resource configuration
 apoc.dv.catalog.add(name :: STRING?, config = {} :: MAP?) :: (name :: STRING?, type :: STRING?, url :: STRING?, desc :: STRING?, labels :: LIST? OF STRING?, query :: STRING?, params :: LIST? OF STRING?)
 ----
 
+include::partial$/dv/deprecated.adoc[]
+
 [WARNING]
 ====
 This procedure is not intended to be used in a cluster environment, and may act unpredictably.

docs/asciidoc/modules/ROOT/pages/overview/apoc.dv/apoc.dv.catalog.list.adoc

@@ -5,7 +5,7 @@ This file is generated by DocsTest, so don't change it!
 = apoc.dv.catalog.list
 :description: This section contains reference documentation for the apoc.dv.catalog.list procedure.
 
-label:procedure[] label:apoc-extended[]
+label:procedure[] label:apoc-extended[] label:deprecated[]
 
 [.emphasis]
 List all virtualized resource configuration
@@ -17,6 +17,8 @@ List all virtualized resource configuration
 apoc.dv.catalog.list() :: (name :: STRING?, type :: STRING?, url :: STRING?, desc :: STRING?, labels :: LIST? OF STRING?, query :: STRING?, params :: LIST? OF STRING?)
 ----
 
+include::partial$/dv/deprecated.adoc[]
+
 == Output parameters
 [.procedures, opts=header]
 |===

docs/asciidoc/modules/ROOT/pages/overview/apoc.dv/apoc.dv.catalog.remove.adoc

@@ -5,7 +5,7 @@ This file is generated by DocsTest, so don't change it!
 = apoc.dv.catalog.remove
 :description: This section contains reference documentation for the apoc.dv.catalog.remove procedure.
 
-label:procedure[] label:apoc-extended[]
+label:procedure[] label:apoc-extended[] label:deprecated[]
 
 [.emphasis]
 Remove a virtualized resource config by name
@@ -17,6 +17,8 @@ Remove a virtualized resource config by name
 apoc.dv.catalog.remove(name :: STRING?) :: (name :: STRING?, type :: STRING?, url :: STRING?, desc :: STRING?, labels :: LIST? OF STRING?, query :: STRING?, params :: LIST? OF STRING?)
 ----
 
+include::partial$/dv/deprecated.adoc[]
+
 [WARNING]
 ====
 This procedure is not intended to be used in a cluster environment, and may act unpredictably.

docs/asciidoc/modules/ROOT/pages/overview/apoc.trigger/apoc.trigger.toNode.adoc

@@ -0,0 +1,28 @@
+
+= apoc.trigger.toNode
+:description: This section contains reference documentation for the apoc.trigger.toNode function.
+
+label:function[] label:apoc-extended[]
+
+== Signature
+
+[source]
+----
+apoc.trigger.toNode(node :: NODE, removedLabels :: MAP, removedNodeProperties :: MAP) :: RELATIONSHIPH
+----
+
+== Input parameters
+[.procedures, opts=header]
+|===
+| Name | Type | Default 
+|node|NODE|null
+|removedLabels|MAP|null
+|removedNodeProperties|MAP|null
+|===
+
+[[usage-apoc.trigger.nodesByLabel]]
+== Usage Examples
+include::partial$usage/apoc.trigger.toNode.adoc[]
+
+xref::background-operations/triggers.adoc[More documentation of apoc.trigger.toNode,role=more information]
+

docs/asciidoc/modules/ROOT/pages/overview/apoc.trigger/apoc.trigger.toRelationship.adoc

@@ -0,0 +1,27 @@
+
+= apoc.trigger.toRelationship
+:description: This section contains reference documentation for the apoc.trigger.toRelationship function.
+
+label:function[] label:apoc-extended[]
+
+== Signature
+
+[source]
+----
+apoc.trigger.toRelationship(rel :: RELATIONSHIP, removedRelationshipProperties :: MAP) :: RELATIONSHIP
+----
+
+== Input parameters
+[.procedures, opts=header]
+|===
+| Name | Type | Default 
+|rel|RELATIONSHIP|null
+|removedRelationshipProperties|MAP|null
+|===
+
+[[usage-apoc.trigger.nodesByLabel]]
+== Usage Examples
+include::partial$usage/apoc.trigger.toRelationship.adoc[]
+
+xref::background-operations/triggers.adoc[More documentation of apoc.trigger.toNode,role=more information]
+

docs/asciidoc/modules/ROOT/pages/virtual-resource/index.adoc

@@ -2,6 +2,8 @@
 = Virtual Resource
 :description: This chapter describes how to handle external data sources as virtual resource without persisting them in the database
 
+include::partial$systemdbonly.note.adoc[]
+
 [NOTE]
 ====
 There are situations where we would like to enrich/complement the results of a cypher query in a Neo4j graph with additional
@@ -40,10 +42,11 @@ image::apoc.dv.imported-graph-from-RDB.png[scaledwidth="100%"]
 == Managing a Virtualized Resource via JDBC
 
 === Creating a Virtualized Resource (JDBC)
-Before we can query a Virtualized Resource, we need to define it. We do this using the `apoc.dv.catalog.add` procedure.
-The procedure takes two parameters:
+Before we can query a Virtualized Resource, we need to define it. We do this using the `apoc.dv.catalog.install` procedure.
+The procedure takes three parameters:
 
 * a name that uniquely identifies the virtualized resource and can be used to query that resource
+* the database name where we want to use the resource (default is `'neo4j'`)
 * a set of parameters indicating the type of the resource (type), the access point (url), the parameterised query
 that will be run on the access point (query) and the labels that will be applied to the generated virtual nodes (labels).
 
@@ -56,7 +59,7 @@ Here is the cypher that creates such virtualized resource:
 
 [source,cypher]
 ----
-CALL apoc.dv.catalog.add("fr-towns-by-dept", {
+CALL apoc.dv.catalog.install("fr-towns-by-dept", "neo4j", {
   type: "JDBC",
   url: "jdbc:postgresql://localhost/communes?user=jb&password=jb",
   labels: ["Town","PopulatedPlace"],
@@ -124,19 +127,19 @@ RETURN path
 ----
 
 === Listing the Virtualized Resource Catalog
-The apoc.dv.catalog.list procedure returns a list with all the existing Virtualized resources and their descriptions. It takes no parameters.
+The apoc.dv.catalog.list procedure returns a list with all the existing Virtualized resources and their descriptions. It accepts one parameter: i.e. the database name where we want to use the resource (default is 'neo4j').
 
 [source,cypher]
 ----
-CALL apoc.dv.catalog.list()
+CALL apoc.dv.catalog.show()
 ----
 
 === Removing Virtualized Resources from the Catalog
 When a Virtualized Resource is no longer needed it can be removed from the catalog by using the apoc.dv.catalog.remove procedure passing as parameter the unique name of the VR.
 
 [source,cypher]
 ----
-CALL apoc.dv.catalog.remove("vr-name")
+CALL apoc.dv.catalog.drop("vr-name", <dbName>)
 ----
 
 === Export metadata
@@ -165,7 +168,7 @@ Here is the cypher that creates such virtualized resource:
 
 [source,cypher]
 ----
-CALL apoc.dv.catalog.add("prod-details-by-id", {
+CALL apoc.dv.catalog.install("prod-details-by-id", "neo4j", {
   type: "CSV",
   url: "http://data.neo4j.com/northwind/products.csv",
   labels: ["ProductDetails"],

docs/asciidoc/modules/ROOT/partials/dv/deprecated.adoc

@@ -0,0 +1,19 @@
+[WARNING]
+====
+Please note that this procedure is deprecated.
+
+Use the following ones instead, which allow for better support in a cluster:
+
+[opts="header"]
+|===
+| deprecated procedure | new procedure
+| `apoc.dv.catalog.add(<name>, $config)` | `apoc.dv.catalog.install('<name>', '<dbName>', $config)`
+| `apoc.dv.catalog.remove('<name>')` | `apoc.dv.catalog.drop('<name>', '<dbName>')`
+| `apoc.dv.catalog.list()` | `apoc.dv.catalog.show('<dbName>')`
+|===
+
+where `<dbName>` is the database where we want to execute the procedure
+
+xref::virtual-resource/index.adoc[See here for more info].
+
+====

docs/asciidoc/modules/ROOT/partials/usage/apoc.trigger.nodesByLabel.adoc

@@ -6,14 +6,15 @@ create constraint for (p:Person)
 require p.id is unique;
 ----
 
-This function is used inside an apoc.trigger.add Cypher statement.
+This function is intended to be used inside an apoc.trigger.install Cypher statement.
 
 We can use it to conditionally run Cypher statements when labels are added or removed or when properties are added or removed.
 For example, we add an `id` property to all `Person` nodes that is the lower case value of the `name` property of that node, by defining the following trigger:
 
 [source,cypher]
 ----
-CALL apoc.trigger.add(
+CALL apoc.trigger.install(
+  'neo4j',
   'lowercase',
   'UNWIND apoc.trigger.nodesByLabel($assignedLabels,"Person") AS n
    SET n.id = toLower(n.name)',

docs/asciidoc/modules/ROOT/partials/usage/apoc.trigger.propertiesByKey.adoc

@@ -1,11 +1,12 @@
-This function is used inside an apoc.trigger.add.adoc Cypher statement.
+This function is intended to be used inside an apoc.trigger.install Cypher statement.
 
 We can use it to conditionally run Cypher statements when properties are added or removed.
 For example, we can connect nodes with a `genre` property to a `Genre` node, with the following trigger:
 
 [source,cypher]
 ----
-CALL apoc.trigger.add(
+CALL apoc.trigger.install(
+  'neo4j',
   'triggerTest',
   'UNWIND apoc.trigger.propertiesByKey($assignedNodeProperties, "genre") as prop
    WITH prop.node as n

docs/asciidoc/modules/ROOT/partials/usage/apoc.trigger.toNode.adoc

@@ -0,0 +1,46 @@
+This function is intended to be used within an `apoc.trigger.install` Cypher statement.
+
+If we want to create a 'before' or 'after' trigger query using `$deletedNodes`, and retrieve entity information such as labels and/or properties, we cannot use the classic Cypher functions labels() and properties().
+Instead, we have to leverage virtual nodes through the function `apoc.trigger.toNode(node, $removedLabels, $removedNodeProperties)`.
+
+For example, to create a new `Report` node with a list of deleted node IDs and all the labels retrieved for each deleted node, we can execute:
+[source,cypher]
+----
+CALL apoc.trigger.install(
+    'neo4j', 'myTrigger',
+    "UNWIND $deletedNodes as deletedNode
+    WITH apoc.trigger.toNode(deletedNode, $removedLabels, $removedNodeProperties) AS deletedNode
+    CALL apoc.merge.node(
+          ['Report'],
+          {labels: apoc.node.labels(deletedNode)},
+          {created: datetime()},
+          {updated: datetime()}
+    ) YIELD node AS report
+    WITH report, deletedNode
+    SET report.deletedIds = coalesce(report.deletedIds, [])+[id(deletedNode)]" ,
+    {phase:'before'}
+);
+----
+
+Now, let's create and delete a `Movie` node:
+
+[source,cypher]
+----
+CREATE (:Movie {title: "The White Tiger"});
+MATCH (movie:Movie {title: "The White Tiger"}) DELETE movie;
+----
+
+Finally, let's check the `Report` node:
+
+[source,cypher]
+----
+MATCH (report:Report {labels: ['Movie']})
+RETURN report;
+----
+
+.Results
+[opts="header"]
+|===
+| report
+| (:Report {"created": "2024-12-12T08:33:27.188000000Z", "deletedIds": [12], "labels": ["Movie"]})
+|===