Github user njayaram2 commented on a diff in the pull request:
https://github.com/apache/incubator-madlib/pull/154#discussion_r129910009
--- Diff: src/ports/postgres/modules/graph/pagerank.py_in ---
@@ -84,11 +85,11 @@ def pagerank(schema_madlib, vertex_table, vertex_id,
edge_table, edge_args,
edge_params = extract_keyvalue_params(edge_args, params_types,
default_args)
# populate default values for optional params if null
- if damping_factor is None:
+ if (damping_factor is None) or (damping_factor == ''):
damping_factor = 0.85
- if max_iter is None:
+ if (max_iter is None) or (max_iter == ''):
max_iter = 100
- if vertex_id is None:
+ if (vertex_id is None) or (vertex_id == ''):
--- End diff --
`if not vertex_id` should work here too.
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