Merge ahristov@bk-internal.mysql.com:/home/bk/mysql-5.1-runtime

into  example.com:/work/mysql-5.1-runtime

include/my_time.h

@@ -100,6 +100,8 @@ int my_TIME_to_str(const MYSQL_TIME *l_time, char *to);
 /*
   The following must be sorted so that simple intervals comes first.
   (get_interval_value() depends on this)
+  When updating this enum please update 
+  LEX_STRING interval_type_to_name[] in sql/time.cc
 */
 
 enum interval_type

sql/event_data_objects.cc

@@ -886,14 +886,29 @@ Event_queue_element::load_from_row(TABLE *table)
     goto error;
 
   /*
-    In DB the values start from 1 but enum interval_type starts
-    from 0
+    We load the interval type from disk as string and then map it to
+    an integer. This decouples the values of enum interval_type
+    and values actually stored on disk. Therefore the type can be
+    reordered without risking incompatibilities of data between versions.
   */
   if (!table->field[ET_FIELD_TRANSIENT_INTERVAL]->is_null())
-    interval= (interval_type) ((ulonglong)
-          table->field[ET_FIELD_TRANSIENT_INTERVAL]->val_int() - 1);
-  else
-    interval= (interval_type) 0;
+  {
+    int i;
+    char buff[MAX_FIELD_WIDTH];
+    String str(buff, sizeof(buff), &my_charset_bin);
+    LEX_STRING tmp;
+
+    table->field[ET_FIELD_TRANSIENT_INTERVAL]->val_str(&str);
+    if (!(tmp.length= str.length()))
+      goto error;
+
+    tmp.str= str.c_ptr_safe();
+
+    i= find_string_in_array(interval_type_to_name, &tmp, system_charset_info);
+    if (i < 0)
+      goto error;
+    interval= (interval_type) i;
+  }
 
   table->field[ET_FIELD_LAST_EXECUTED]->get_date(&last_executed,
                                                  TIME_NO_ZERO_DATE);

sql/event_db_repository.cc

@@ -188,11 +188,11 @@ mysql_event_fill_row(THD *thd, TABLE *table, Event_parse_data *et,
     fields[ET_FIELD_INTERVAL_EXPR]->store((longlong)et->expression, TRUE);
 
     fields[ET_FIELD_TRANSIENT_INTERVAL]->set_notnull();
-    /*
-      In the enum (C) intervals start from 0 but in mysql enum valid values
-      start from 1. Thus +1 offset is needed!
-    */
-    fields[ET_FIELD_TRANSIENT_INTERVAL]->store((longlong)et->interval+1, TRUE);
+
+    fields[ET_FIELD_TRANSIENT_INTERVAL]->
+                            store(interval_type_to_name[et->interval].str,
+                                  interval_type_to_name[et->interval].length,
+                                  scs);
 
     fields[ET_FIELD_EXECUTE_AT]->set_null();
 

sql/mysql_priv.h

@@ -1481,6 +1481,8 @@ uint find_type2(TYPELIB *lib, const char *find, uint length, CHARSET_INFO *cs);
 void unhex_type2(TYPELIB *lib);
 uint check_word(TYPELIB *lib, const char *val, const char *end,
 		const char **end_of_word);
+int find_string_in_array(LEX_STRING * const haystack, LEX_STRING * const needle,
+                         CHARSET_INFO *cs);
 
 
 bool is_keyword(const char *name, uint len);

sql/strfunc.cc

@@ -312,3 +312,33 @@ uint strconvert(CHARSET_INFO *from_cs, const char *from,
   return (uint32) (to - to_start);
 
 }
+
+
+/*
+  Searches for a LEX_STRING in an LEX_STRING array.
+
+  SYNOPSIS
+    find_string_in_array()
+      heap    The array
+      needle  The string to search for
+
+  NOTE
+    The last LEX_STRING in the array should have str member set to NULL
+
+  RETURN VALUES
+    -1   Not found
+    >=0  Ordinal position
+*/
+
+int find_string_in_array(LEX_STRING * const haystack, LEX_STRING * const needle,
+                         CHARSET_INFO * const cs)
+{
+  const LEX_STRING *pos;
+  for (pos= haystack; pos->str; pos++)
+    if (!cs->coll->strnncollsp(cs, (uchar *) pos->str, pos->length,
+                               (uchar *) needle->str, needle->length, 0))
+    {
+      return (pos - haystack);
+    }
+  return -1;
+}