[jira] [Created] (ARROW-13873) [C++] Duplicate functions array_filter/array_take and filter/take

["Weston Pace (Jira)" <ji...@apache.org>]

Weston Pace created ARROW-13873:
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             Summary: [C++] Duplicate functions array_filter/array_take and filter/take
                 Key: ARROW-13873
                 URL: https://issues.apache.org/jira/browse/ARROW-13873
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Weston Pace


This has been explained to me as a metafunction and a backend but in that case the backend should not be registered with the function registry.  Note both:

{code:cpp}
const FunctionDoc filter_doc(
    "Filter with a boolean selection filter",
    ("The output is populated with values from the input at positions\n"
     "where the selection filter is non-zero.  Nulls in the selection filter\n"
     "are handled based on FilterOptions."),
    {"input", "selection_filter"}, "FilterOptions");
{code}

and

{code:cpp}
const FunctionDoc array_filter_doc(
    "Filter with a boolean selection filter",
    ("The output is populated with values from the input `array` at positions\n"
     "where the selection filter is non-zero.  Nulls in the selection filter\n"
     "are handled based on FilterOptions."),
    {"array", "selection_filter"}, "FilterOptions");
{code}

which seems wrong as well.



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