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Allow multiple :START_ID/:END_ID columns in CSV input for importer #2420

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Jul 9, 2025
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Allow multiple :START_ID/:END_ID columns in CSV input for importer #2420

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13 changes: 7 additions & 6 deletions modules/ROOT/pages/import.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -1462,8 +1462,9 @@ Now use the previously defined ID spaces when connecting the actors to movies.
[[import-tool-multiple-ids]]
== Using multiple node IDs

A node header can also contain multiple `ID` columns, where the relationship data references the composite value of all those columns.
This also implies using `string` as `id-type`.
A node header can contain multiple `ID` columns.
The relationship data must then use a matching number of `START_ID` / `END_ID` columns as references to the composite value of those ID columns.
This implies using `string` as `id-type`.

For each `ID` column, you can specify to store its values as different node properties.
However, the composite value cannot be stored as a node property.
Expand Down Expand Up @@ -1498,13 +1499,13 @@ Now use both IDs when defining the relationship:
.relationships_header.csv
[source, csv]
----
:START_ID,:TYPE,:END_ID
:START_ID,:START_ID,:TYPE,:END_ID,:END_ID
----

.relationships.csv
[source, csv]
----
aa11,WORKS_WITH,bb22
aa,11,WORKS_WITH,bb,22
----
====

Expand Down Expand Up @@ -1532,13 +1533,13 @@ Now use the defined ID space when connecting John with Paul, and use both IDs in
.relationships_header.csv
[source, csv]
----
:START_ID(MyGroup),:TYPE,:END_ID(MyGroup)
:START_ID(MyGroup),:START_ID(MyGroup),:TYPE,:END_ID(MyGroup),:END_ID(MyGroup)
----

.relationships.csv
[source, csv]
----
aa11,WORKS_WITH,bb22
aa,11,WORKS_WITH,bb,22
----
====

Expand Down