Use db.getcolumndata to determine column type as previous version did not work for sqlite

lib/dbmodelfunctions.lua

@@ -126,14 +126,15 @@ function mymodule.list_table_entries(dbase, self, clientdata)
 			if t == retval.value.table.value then
 				retval.value.table.errtxt = nil
 				retval.errtxt = nil
-				-- FIXME - in the future, we should be able to do next these three things in one function call to db
-				retval.value.fields.value = db.listcolumns(t) or {}
-				retval.value.keyfields.value = db.listkeycolumns(t) or {}
-				-- this will not work for sqlite and the results are database-specific
-				local sql = "SELECT data_type FROM information_schema.columns WHERE table_name = '"..db.escape(t).."' ORDER BY ordinal_position"
-				local types = db.getselectresponse(sql)
 				local fieldtypes = {}
-				for i,f in ipairs(types) do fieldtypes[retval.value.fields.value[i]] = f.data_type end
+				local columndata = db.getcolumndata(t)
+				for i,c in ipairs(columndata) do
+					retval.value.fields.value[#retval.value.fields.value+1] = c.name
+					if c.key then
+						retval.value.keyfields.value[#retval.value.keyfields.value+1] = c.name
+					end
+					fieldtypes[c.name] = c.type
+				end
 
 				local orderby = {}
 				local columns = {}