[GitHub] [age] TalhaMunir-JD commented on issue #966: How to export graph data for Giraph analysis?

["TalhaMunir-JD (via GitHub)" <gi...@apache.org>]

TalhaMunir-JD commented on issue #966:
URL: https://github.com/apache/age/issues/966#issuecomment-1579968648

   Here are some of the steps you can follow to export data generated by Apache Age for analysis with Apache Giraph. 
   
   Let's say you have a graph that represents a set of teachers and their status. The teacher node has properties like "teacher_id", "name", "age", while the status edges will have properties like: "status_id", and "status".
   
   To export this graph data from Apache AGE for analysis with Apache Giraph, you can follow these steps:
   
   Export the data as a separate CSV file: 
   
   - Use the below query to retrieve the Teacher's data from the tables in Apache Age and export it to a CSV file. For example, you will execute a query like:
   
   `COPY (SELECT teacher_id, name, age FROM teacher) TO '/path/to/teachers.csv' CSV HEADER;`
   
   Similarly, exporting the status data as a separate CSV file:
   `COPY (SELECT status_id, status FROM status) TO '/path/to/status.csv' CSV HEADER;`
   
   - Now transport the above-exported data into an edge list.
     - In Apache Giraph the data is typically represented as an edge list, where each line represents an edge between 2 nodes. You need to transform the exported data from apache age into this format. 
     - Create a new file graph.txt and write the transformed data in the edge list format. each line in the file would represent a status edge between 2 teachers.
     - The file will look something like this:
     - `teacher1, teacher2
   teacher1, teacher3
   teacher2, teacher3`
   - Now import the transformed data into the Apache Giraph. You can use different tools of Giraph for analyzing the graph data. 


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