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https://issues.apache.org/jira/browse/MADLIB-1209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16373973#comment-16373973
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ASF GitHub Bot commented on MADLIB-1209:
----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/madlib/pull/238
> Neural nets fails on Greenplum 4.3.x when verbose argument set to TRUE
> ----------------------------------------------------------------------
>
> Key: MADLIB-1209
> URL: https://issues.apache.org/jira/browse/MADLIB-1209
> Project: Apache MADlib
> Issue Type: Bug
> Components: Module: Neural Networks
> Reporter: Frank McQuillan
> Priority: Minor
> Fix For: v1.14
>
>
> In
> {code}
> mlp_classification(
> source_table,
> output_table,
> independent_varname,
> dependent_varname,
> hidden_layer_sizes,
> optimizer_params,
> activation,
> weights,
> warm_start,
> verbose,
> grouping_col
> )
> {code}
> when the `verbose` argument is set to `TRUE` the following error results:
> {code}
> ERROR: plpy.SPIError: function array_length(double precision[], integer)
> does not exist (plpython.c:4656)
> LINE 4: _state_current[array_length(_sta...
> ^
> HINT: No function matches the given name and argument types. You may need to
> add explicit type casts.
> QUERY:
> SELECT
>
> _state_current[array_length(_state_current,1)] AS
> loss
> ,
> __madlib_temp_col_grp_key29688300_1519168141_31322353__
> FROM (
> SELECT grp_key AS
> __madlib_temp_col_grp_key29688300_1519168141_31322353__, state AS
> _state_current FROM madlib._gen_state($3, NULL, $4)
> ) subq1
>
> CONTEXT: Traceback (most recent call last):
> PL/Python function "mlp_classification", line 33, in <module>
> grouping_col
> PL/Python function "mlp_classification", line 290, in mlp
> PL/Python function "mlp_classification", line 455, in
> get_param_value_per_group
> PL/Python function "mlp_classification"
> {code}
> because `array_length` does not exist in Greenplum 4.3.x .
> It works OK in Greenplum 5.x and Postgres 9.x/10 however.
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