Paginación de access

sqlquerybuilder/__init__.py

@@ -292,6 +292,9 @@ class SQLQuery(object):
         clone._group_by = args
         return clone
 
+    def first(self):
+        return self[:1]
+
     def join(self, table, on="", how="inner join"):
         clone = self._clone()
         if on:
@@ -423,6 +426,31 @@ class SQLCompiler(object):
                     self.get_group_by(),
                     self.get_limits(), ") as tbl_paginated WHERE ", conds]
 
+        if self.sql_mode == "ACCESS" and self._limits and \
+           self._limits.start is not None and self._limits.stop is not None:
+            conds = []
+
+            if self._limits.start is not None:
+                conds.append("row_number > %s" % self._limits.start)
+
+            if self._limits.stop is not None:
+                conds.append("row_number <= %s" % self._limits.stop)
+
+            conds = " AND ".join(conds)
+            count = "(select count(*) FROM {table} as t2 WHERE t2.{id} <= {table}.{id}) as row_number".format(table=table,
+                                                                                                              id=self._order_by[0])
+
+            return ["SELECT * FROM (", "SELECT", self.get_columns(), ",",
+                    count,
+                    # "FROM",
+                    # table,
+                    self.get_joins(),
+                    self.get_where(),
+                    self.get_group_by(),
+                    " FROM ",
+                    table,
+                    ") WHERE ", conds]
+
         return sql
 
     def _compile(self):