How to import data from eXist database to PostgreSQL database?

Question

Is there any extension/tool/script available to import data from eXist database to PostgreSQL database automatically?

Answer 1

From the tag description it's pretty clear that you're going to need to use an ETL tool or some custom code. Which is easier depends on the nature of the data and how you want to migrate it.

I'd start by looking at Talend Studio and Pentaho Kettle. See if either of them can meet your needs.

If you can turn the eXist data into structured CSV exports then you can probably just hand-define tables for it in PostgreSQL then COPY the data into it or use pgloader.

If not, then I'd suggest picking up the language you're most familiar with (Python, Java, whatever) and using the eXist data connector for that language along with the PostgreSQL data connector for the language. Write a script that fetches data from eXist and feeds it to PostgreSQL. If using Python I'd use the Psycopg2 database connector, as it's fast and supports COPY for bulk data loading.