Question

My goal is to produce a table with two header rows. The first with a few column-spanning cells, the second with all 1-cell headers, but with sortBy and filterBy enabled.

<p:dataTable ....  >
  <p:columnGroup type="header">
    <p:row>
      <p:column colspan="3" headerText="my header 1" />
      <p:column colspan="3" headerText="my header 2" />
    </p:row>
  </p:columnGroup>
  <p:column sortBy="#{myBean.var1}" filterBy="#{myBean.var1}" headerText="var1">
    <h:outputText value="#{...var1}" />
  </p:column>
  .
  .
</p:dataTable>

I can get either the columnGroup to show up or the per-column headerText with sortBy and filterBy, but not both. When I mix them, the header components from the per-column header row disappears.

Answer 1

As it turns out, it is possible to nest dataTables via the subTable component. This showcase example demonstrates nesting a subTable in a larger dataTable, there-by achieving filtering and sorting combined with columnGroups in the headers.