... that tries to match a locale independent query string.

Going via string queries is likely only necessary for the ugly
alternative "fieldname[member]" syntax, if it is actually unnecessary
for the field1,item1,... syntax needs to be evaluated and if so a
distinct GetPivotData() function evaluating numeric contraints as well
could be introduced.

Change-Id: I2c1fc81c1022b0bba5eef8d86c0c815bb6e31f2d
Reviewed-on: https://gerrit.libreoffice.org/25975Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>