[GitHub] [arrow] lidavidm commented on pull request #12033: ARROW-15091: [C++][Doc] Document nodes in C++ streaming execution engine

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lidavidm commented on pull request #12033:
URL: https://github.com/apache/arrow/pull/12033#issuecomment-1004989201


   Can we add a placeholder section and link to that perhaps?
   
   On Tue, Jan 4, 2022, at 11:48, Vibhatha Lakmal Abeykoon wrote:
   > 
   > 
   > ***@***.**** commented on this pull request.
   > 
   > 
   > In docs/source/cpp/streaming_execution.rst <https://github.com/apache/arrow/pull/12033#discussion_r778232832>:
   > 
   > > +    // data schema 
   > +    auto schema = arrow::schema({...})
   > +    
   > +    // source node options
   > +    auto source_node_options = arrow::compute::SourceNodeOptions{schema, gen};
   > +    
   > +    // create a source node
   > +    ARROW_ASSIGN_OR_RAISE(arrow::compute::ExecNode * source,
   > +                            arrow::compute::MakeExecNode("source", plan.get(), {}, 
   > +                            source_node_options));
   > +
   > +``FilterNode``
   > +--------------
   > +
   > +:class:`FilterNode`, as the name suggests, provide a container to define a data filtering criteria. 
   > +Filter can be written using :class:`arrow::compute::Expression`. For instance if the row values
   > 
   > compute.rst contains a some of the function definitions, but not a detailed examples on how to use expressions.
   > 
   > 
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