Index: trunk/Ohana/src/opihi/dvo/dbCmdlineFields.c
===================================================================
--- trunk/Ohana/src/opihi/dvo/dbCmdlineFields.c	(revision 14191)
+++ trunk/Ohana/src/opihi/dvo/dbCmdlineFields.c	(revision 14401)
@@ -70,2 +70,111 @@
   return (fields);
 }
+
+char *strfloat (float value) {
+
+  int Nbyte;
+  char *output;
+  char tmp;
+
+  Nbyte = snprintf (&tmp, 0, "%f", value);
+  ALLOCATE (output, char, Nbyte + 1);
+  snprintf (output, Nbyte + 1, "%f", value);
+  return output;
+}
+
+// identify the fields to be extracted (test for where, check syntax)
+int dbAstroRegionLimits (dbStack **stack, int *nstack, SkyRegionSelection *selection, int table) {
+  
+  int N;
+  double Rmin, Rmax, Dmin, Dmax;
+  char *Rname, *Dname;
+
+  if (!selection->useDisplay && !selection->useSkyregion) return (TRUE);
+
+  // get the ra,dec limits...
+  if (selection->useDisplay) {
+    return (TRUE);
+    // XXX fix this: be more careful with the projection & limits
+
+    Graphdata graphsky;
+    if (!GetGraphData (&graphsky, NULL, NULL)) {
+      gprint (GP_ERR, "region display not available\n");
+      return (FALSE);
+    }
+    
+    // XXX the ra and dec range depend on the projection. 
+    // XXX this is wrong...
+    int status;
+    status = XY_to_RD (&Rmin, &Dmin, graphsky.xmin, graphsky.ymin, &graphsky.coords);
+    status = XY_to_RD (&Rmax, &Dmax, graphsky.xmax, graphsky.ymax, &graphsky.coords);
+  }
+
+  if (selection->useSkyregion) {
+    get_skyregion (&Rmin, &Rmax, &Dmin, &Dmax);
+  }    
+
+  N = *nstack;
+  REALLOCATE (*stack, dbStack, N + 20);
+
+  if (table == DVO_TABLE_AVERAGE) {
+    Rname = strcreate ("RA");
+    Dname = strcreate ("DEC");
+  } else {
+    Rname = strcreate ("RA:AVE");
+    Dname = strcreate ("DEC:AVE");
+  }
+
+  // add: ((ra > rmin) && (ra < rmax) && (dec > dmin) && (dec < dmax))
+  // prepend with && if *nstack > 0
+
+  stack[0][N +  0].name = strcreate (Rname);
+  stack[0][N +  0].type = 'X';
+  stack[0][N +  1].name = strfloat (Rmin);
+  stack[0][N +  1].type = 'X';
+  stack[0][N +  2].name = strcreate (">");
+  stack[0][N +  2].type = 4;
+  // stack[0][N +  3].name = strcreate ("A");
+  // stack[0][N +  3].type = 3;
+
+  stack[0][N +  3].name = strcreate (Rname);
+  stack[0][N +  3].type = 'X';
+  stack[0][N +  4].name = strfloat (Rmax);
+  stack[0][N +  4].type = 'X';
+  stack[0][N +  5].name = strcreate ("<");
+  stack[0][N +  5].type = 4;
+  stack[0][N +  6].name = strcreate ("A");
+  stack[0][N +  6].type = 3;
+
+  stack[0][N +  7].name = strcreate (Dname);
+  stack[0][N +  7].type = 'X';
+  stack[0][N +  8].name = strfloat (Dmin);
+  stack[0][N +  8].type = 'X';
+  stack[0][N +  9].name = strcreate (">");
+  stack[0][N +  9].type = 4;
+  stack[0][N + 10].name = strcreate ("A");
+  stack[0][N + 10].type = 3;
+
+  stack[0][N + 11].name = strcreate (Dname);
+  stack[0][N + 11].type = 'X';
+  stack[0][N + 12].name = strfloat (Dmax);
+  stack[0][N + 12].type = 'X';
+  stack[0][N + 13].name = strcreate ("<");
+  stack[0][N + 13].type = 4;
+  stack[0][N + 14].name = strcreate ("A");
+  stack[0][N + 14].type = 3;
+
+  if (N == 0) {
+    N += 15;
+  } else {
+    stack[0][N + 15].name = strcreate ("A");
+    stack[0][N + 15].type = 3;
+    N += 16;
+  }    
+
+  free (Rname);
+  free (Dname);
+
+  *nstack = N;
+  return (TRUE);
+}
+