Slow query log to file now displays queries with microsecond precission

--long-query-time is now given in seconds with microseconds as decimals
--min_examined_row_limit added for slow query log
long_query_time user variable is now double with 6 decimals
Added functions to get time in microseconds
Added faster time() functions for system that has gethrtime()  (Solaris)
We now do less time() calls.
Added field->in_read_set() and field->in_write_set() for easier field manipulation by handlers
set_var.cc and my_getopt() can now handle DOUBLE variables.
All time() calls changed to my_time()
my_time() now does retry's if time() call fails.
Added debug function for stopping in mysql_admin_table() when tables are locked
Some trivial function and struct variable renames to avoid merge errors.
Fixed compiler warnings
Initialization of some time variables on windows moved to my_init()

sql/sql_table.cc

@@ -54,6 +54,20 @@ mysql_prepare_alter_table(THD *thd, TABLE *table,
                           HA_CREATE_INFO *create_info,
                           Alter_info *alter_info);
 
+#ifndef DBUG_OFF
+
+/* Wait until we get a 'mysql_kill' signal */
+
+static void wait_for_kill_signal(THD *thd)
+{
+  while (thd->killed == 0)
+    sleep(1);
+  // Reset signal and continue as if nothing happend
+  thd->killed= THD::NOT_KILLED;
+}
+#endif
+
+
 /*
   Translate a file name to a table name (WL #1324).
 
@@ -4111,6 +4125,7 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
                               RTFC_WAIT_OTHER_THREAD_FLAG |
                               RTFC_CHECK_KILLED_FLAG);
       thd->exit_cond(old_message);
+      DBUG_EXECUTE_IF("wait_in_mysql_admin_table", wait_for_kill_signal(thd););
       if (thd->killed)
 	goto err;
       /* Flush entries in the query cache involving this table. */