moved prune_partition_set decl from handler.h to sql_partition.h during merge

cleaned up some files from the partition code move

sql/Makefile.am

@@ -65,7 +65,8 @@ noinst_HEADERS =	item.h item_func.h item_sum.h item_cmpfunc.h \
 			sp_head.h sp_pcontext.h sp_rcontext.h sp.h sp_cache.h \
 			parse_file.h sql_view.h	sql_trigger.h \
 			sql_array.h sql_cursor.h event.h event_priv.h \
-			sql_plugin.h authors.h sql_partition.h partition_info.h partition_element.h
+			sql_plugin.h authors.h sql_partition.h partition_info.h \
+			partition_element.h
 mysqld_SOURCES =	sql_lex.cc sql_handler.cc sql_partition.cc \
 			item.cc item_sum.cc item_buff.cc item_func.cc \
 			item_cmpfunc.cc item_strfunc.cc item_timefunc.cc \

sql/partition_info.cpp

@@ -191,7 +191,7 @@ bool partition_info::set_up_default_partitions(handler *file, ulonglong max_rows
 bool partition_info::set_up_default_subpartitions(handler *file, 
                                                   ulonglong max_rows)
 {
-  uint i, j; //, no_parts, no_subparts;
+  uint i, j;
   char *default_name, *name_ptr;
   bool result= TRUE;
   partition_element *part_elem;
@@ -200,16 +200,11 @@ bool partition_info::set_up_default_subpartitions(handler *file,
 
   if (no_subparts == 0)
     no_subparts= file->get_default_no_partitions(max_rows);
-//  no_parts= part_info->no_parts;
-  //no_subparts= part_info->no_subparts;
   if (unlikely((no_parts * no_subparts) > MAX_PARTITIONS))
   {
     my_error(ER_TOO_MANY_PARTITIONS_ERROR, MYF(0));
     goto end;
   }
-//  if (unlikely((!(default_name=
-  //           create_default_partition_names(no_subparts, (uint)0, TRUE)))))
-    //goto end;
   i= 0;
   do
   {
@@ -277,6 +272,17 @@ bool partition_info::set_up_defaults_for_partitioning(handler *file,
   DBUG_RETURN(FALSE);
 }
 
+/*
+  A support function to check if a partition element's name is unique
+  
+  SYNOPSIS
+    has_unique_name()
+    partition_element  element to check
+
+  RETURN VALUES
+    TRUE               Has unique name
+    FALSE              Doesn't
+*/
 bool partition_info::has_unique_name(partition_element *element)
 {
   DBUG_ENTER("partition_info::has_unique_name");

sql/sql_partition.h

@@ -92,6 +92,7 @@ int get_parts_for_update(const byte *old_data, byte *new_data,
                          longlong *func_value);
 int get_part_for_delete(const byte *buf, const byte *rec0,
                         partition_info *part_info, uint32 *part_id);
+void prune_partition_set(const TABLE *table, part_id_range *part_spec);
 bool check_partition_info(partition_info *part_info,handlerton **eng_type,
                           handler *file, ulonglong max_rows);
 bool fix_partition_func(THD *thd, const char *name, TABLE *table,