ArangoDB：如何将集合导出到CSV？

Question

I have noticed there is a feature in web interface of ArangoDB which allows users to Download or Upload data as JSON file. However, I find nothing similar for CSV exporting. How can an existing Arango DB collection be exported to a .csv file?

Answer 1

If you want to export data from ArangoDB to CSV, then you should use Arangoexport . It is included in the full packages as well as the client-only packages. You find it next to the arangod server executable.

Basic usage:
https://docs.arangodb.com/3.4/Manual/Programs/Arangoexport/Examples.html#export-csv

Also see the CSV example with AQL query:
https://docs.arangodb.com/3.4/Manual/Programs/Arangoexport/Examples.html#export-via-aql-query

Using an AQL query for a CSV export allows you to transform the data if desired, eg to concatenate an array to a string or unpack nested objects. If you don't do that, then the JSON serialization of arrays/objects will be exported (which may or may not be what you want).

Answer 2

The default Arango install includes the following file:

/usr/share/arangodb3/js/contrib/CSV_export/CSVexport.js

It includes this comment:

// This is a generic CSV exporter for collections.
//
// Usage: Run with arangosh like this:
//   arangosh --javascript.execute <CollName> [ <Field1> <Field2> ... ]

Unfortunately, at least in my experience, that usage tip is incorrect . Arango team, if you are reading this, please correct the file or correct my understanding.

Here's how I got it to work:

arangosh --javascript.execute "/usr/share/arangodb3/js/contrib/CSV_export/CSVexport.js" "<CollectionName>"
Please specify a password: 

Then it sends the CSV data to stdout. (If you with to send it to a file, you have to deal with the password prompt in some way.)