Setting up column filtering
---------------------------

The next step is to enable filtering on a per-column basis. Indicia has not
automatically done this for you since it does not know the type of data in each
field yet so it does not know how to write the SQL to filter the records. We can
do this using the ``datatype`` attribute of a column definition, which can be
set to date, text, integer or float. Try this by adding an attribute
``datatype="text"`` to the definition of the Species column, save the report
file and reload the report in the warehouse. You should have an extra box at the
top of the Species column so try typing the first few characters of a species
name followed by * then tabbing out of the box to check it works.

Next step, of course, is to apply the datatype attribute to the other column
definitions. Your XML document should now look like:

.. code-block:: xml

  <?xml version="1.0" encoding="UTF-8"?>
  <report title="Tutorial"
        description="Display some records for the report writing tutorial">
    <query>
      select #columns#
      from cache_occurrences_functional o
      join cache_samples_nonfunctional snf on snf.id=o.sample_Id
      join cache_taxa_taxon_lists cttl on cttl.id=o.taxa_taxon_list_id
      where o.created_on&gt;now()-'1 month'::interval
    </query>
    <columns>
      <column name="id" sql="o.id" visible="false" datatype="integer"/>
      <column name="public_entered_sref" sql="snf.public_entered_sref"
              display="Grid Ref" datatype="text"/>
      <column name="preferred_taxon" sql="cttl.preferred_taxon"
              display="Species" datatype="text"/>
      <column name="default_common_name" sql="cttl.default_common_name"
              display="Common Name" datatype="text"/>
      <column name="date_start" sql="o.date_start" visible="false"/>
      <column name="date_end" sql="o.date_end" visible="false"/>
      <column name="date_type" sql="o.date_type" visible="false"/>
      <column name="date" display="Date" datatype="date"/>
    </columns>
  </report>