Github user orhankislal commented on the issue:
https://github.com/apache/incubator-madlib/pull/78
@decibel Thanks for your comments. Let me try to address some of them.
Number of updates are bound by the number of vertices in the worst case.
Since one of our supported platforms (greenplum) has a 1 GB limit for any given
field I am somewhat hesitant in this method. I will give it a try though.
The `distributed by` clauses guide the database system for the indices. I
agree that they would be useful for postgres.
I will try the edge representation with pgplsql to see how it affects the
performance.
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