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Posted to issues@madlib.apache.org by "Nandish Jayaram (JIRA)" <ji...@apache.org> on 2017/07/17 17:58:00 UTC

[jira] [Created] (MADLIB-1141) Graph - SSSP with empty string grouping_col fails

Nandish Jayaram created MADLIB-1141:
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             Summary: Graph - SSSP with empty string grouping_col fails
                 Key: MADLIB-1141
                 URL: https://issues.apache.org/jira/browse/MADLIB-1141
             Project: Apache MADlib
          Issue Type: Bug
          Components: Module: Graph
            Reporter: Nandish Jayaram
             Fix For: v1.12


Using the dataset provided in Graph SSSP's user doc page, the following query results in an error:
{code}
SELECT madlib.graph_sssp(                                                                                                                                                                       'vertex',      -- Vertex table                                                                                                                                                       NULL,          -- Vertix id column (NULL means use default naming)                                                                                                                   'edge',        -- Edge table                                                                                                                                                         NULL,          -- Edge arguments (NULL means use default naming)                                                                                                                     0,             -- Source vertex for path calculation                                                                                                                                 'out',
''     -- empty grouping_col);
{code}

The error is:
{code}
ERROR:  spiexceptions.SyntaxError: syntax error at or near ","
LINE 2:                      ,  src AS id, weight,
                             ^
QUERY:   CREATE TABLE out AS (SELECT
                     ,  src AS id, weight,
                    src AS parent FROM edge LIMIT 0)

CONTEXT:  Traceback (most recent call last):
  PL/Python function "graph_sssp", line 23, in <module>
    return sssp.graph_sssp(**globals())
  PL/Python function "graph_sssp", line 151, in graph_sssp
PL/Python function "graph_sssp"
{code}

Empty grouping_col string must be treated the same as a NULL.



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