.. _`Lookup Table`:

.. _`org.sysess.sympathy.data.table.lookuptable`:

Lookup Table
~~~~~~~~~~~~

.. image:: lookup.svg
   :width: 48




*Input ports*:
    :lookup: table

        Lookup table
    :lookupee: table

        Control table

*Output ports*:
    :out: table

        Result table

*Configuration*:
    **Lookup columns** (template_columns)
        A list storing columns in the lookup table used for matching. At each index there is a corresponding entry in lookupee_columns.
    **Control columns** (lookupee_columns)
        A list storing columns in the control table used for matching. At each index there is a corresponding entry in template_columns.
    **Event column** (event_column)
        Stores the index of the column pair which is to be matched as events, or -1 if no such column pair has been selected.
    **Require perfect match** (perfect_match)
        If checked, each row in the control table has to match exactly one row in the lookup table.
    **Use zero-like values instead of masks** (nomasks)
        When unchecked rows that can not be matched will be masked. When checked such rows are instead assigned 0, 0.0, False, "", etc. depending on the type of the value column.

.. automodule:: node_lookup_table

.. class:: LookupTableNode


Example flows
#############

* :download:`LookupTable.syx </_examples/Sympathy/Data Processing/Structure/LookupTable.syx>`