Batch Import on the existing nodes and relationships

[jexp]

Batch Import on the existing nodes and relationships

[jexp]

Please explain your use-case.

It can append to existing databases, if you configure it like that.

[prashant23]

actually am trying to import data in neo4j using this utility at first am able to do the same but when i try to export new data then it overwrites the existing one so can you tell me how i can import the new relationship or append the existing relationship's data b/w existing nodes using this utility.

[jexp]

Please study the readme file.

[prashant23]

yes i have tried using batch_import.keep_db=true in batch.properties file but it is creating new nodes and new relationship can you tell me how i can update the existing relationship if will provide new relationship.csv file will all the updated information in it ??

[prashant23]

now the data is not being deleted that problem is solved existing data is also there and it is making new nodes and relationships!!

[prashant23]

Can any body tell me that is it possible what am trying to do with batch-import tool or not ???

[jexp]

This csv-importer is meant for initial imports of CSV-files, not updates.

But you can easily write your own import/update tool using Neo4j's BatchInserter API, feel free to reuse code from this tool for that.

[prashant23]

Hi can you provide some example code or sample code for doing update in existing nodes and relationships on the basis of their index that will be very helpful. am trying to do same kind of thing which you have done for generating nodes and relationship of Callers and Calls made. i have seen that example which you have given on stack overflow.

http://stackoverflow.com/questions/7794972/neo4j-huge-graph-and-solution

[jexp]

I think if you don't want to go with the CSV-batch-inserter it is best to ask on the google group or stackoverflow, so that more people benefit from the answer. Also please share there the work you've already done and where you got stuck.

[prashant23]

sure i'll post my question there also, can you show some light on what am trying to do i want to update the relationship in existing nodes in batch mode can you help ??

[stephanf]

The batch importer is for clean import only, it erases all data in a graph db.

To do a continous update / insert on a graph db you need to program you own logic or use a standard ETL tool with the neo4j jdbc driver.

In my opinion jdbc is ok but not perfect. Building your own update mechanism is more effort but better for you specific domain. Also because ETL tools do follow a SQL paradigma - which can hurt.

You also can have a look at the OGM of hibernate.

Sorry for posting here...

On 28.10.2013, at 11:50, prashant23 [email protected] wrote:

sure i'll post my question there also, can you show some light on what am trying to do i want to update the relationship in existing nodes in batch mode can you help ??

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