- Fixed that Aria works with HANDLER commands

- Added test case for Aria
- Tested HANDLER with HEAP (changes to HEAP code will be pushed in 5.3)
- Moved all HANDLER test to suite/handler.


mysql-test/Makefile.am:
  Added suite/handler
mysql-test/mysql-test-run.pl:
  Added suite/handler
mysql-test/r/lock_multi.result:
  Remove test that is already in handler test suite
mysql-test/suite/handler/aria.result:
  Test for HANDLER with Aria storage engine
mysql-test/suite/handler/aria.test:
  Test for HANDLER with Aria storage engine
mysql-test/suite/handler/handler.inc:
  Extended the general handler test
  Moved interface testing to 'interface.test'
mysql-test/suite/handler/init.inc:
  Common init for handler tests.
mysql-test/suite/handler/innodb.result:
  New results
mysql-test/suite/handler/innodb.test:
  Update to use new include files
mysql-test/suite/handler/interface.result:
  Test of HANDLER interface (not storage engine dependent parts)
mysql-test/suite/handler/interface.test:
  Test of HANDLER interface (not storage engine dependent parts)
mysql-test/suite/handler/myisam.result:
  New results
mysql-test/suite/handler/myisam.test:
  Update to use new include files
mysql-test/t/lock_multi.test:
  Remove test that is already in handler test suite
mysys/tree.c:
  Added missing handling of read previous (showed up in HEAP testing)
sql/handler.cc:
  Don't marka 'HA_ERR_RECORD_CHANGED' as fatal (can be used with HANDLER READ, especially with MEMORY ENGINE)
sql/handler.h:
  Added prototype for can_continue_handler_scan()
sql/sql_handler.cc:
  Re-initialize search if we switch from key to table search.
  Check if handler can continue searching between calls (via can_continue_handler_scan())
  Don't write common not fatal errors to log
storage/maria/ma_extra.c:
  Don't set index 0 as default. This forces call to ma_check_index() to set up index variables.
storage/maria/ma_ft_boolean_search.c:
  Ensure that info->last_key.keyinfo is set
storage/maria/ma_open.c:
  Don't set index 0 as default. This forces call to ma_check_index() to set up index variables.
storage/maria/ma_rkey.c:
  Trivial optimization
storage/maria/ma_rnext.c:
  Added missing code from mi_rnext.c to ensure that handler next/prev works.
storage/maria/ma_rsame.c:
  Simple optimizations
storage/maria/ma_search.c:
  Initialize info->last_key once and for all when we change keys.
storage/maria/ma_unique.c:
  Ensure that info->last_key.keyinfo is up to date.

sql/sql_handler.cc

@@ -548,6 +548,12 @@ retry:
         mode= RLAST;
     }
   }
+  else if (table->file->inited != handler::RND)
+  {
+    /* Convert RNEXT to RFIRST if we haven't started row scan */
+    if (mode == RNEXT)
+      mode= RFIRST;
+  }
 
   if (insert_fields(thd, &thd->lex->select_lex.context,
                     tables->db, tables->alias, &it, 0))
@@ -569,6 +575,8 @@ retry:
     case RNEXT:
       if (table->file->inited != handler::NONE)
       {
+        if ((error= table->file->can_continue_handler_scan()))
+          break;
         if (keyname)
         {
           /* Check if we read from the same index. */
@@ -603,6 +611,8 @@ retry:
       DBUG_ASSERT((uint) keyno == table->file->get_index());
       if (table->file->inited != handler::NONE)
       {
+        if ((error= table->file->can_continue_handler_scan()))
+          break;
         error=table->file->index_prev(table->record[0]);
         break;
       }
@@ -673,8 +683,11 @@ retry:
         continue;
       if (error != HA_ERR_KEY_NOT_FOUND && error != HA_ERR_END_OF_FILE)
       {
-        sql_print_error("mysql_ha_read: Got error %d when reading table '%s'",
-                        error, tables->table_name);
+        /* Don't give error in the log file for some expected problems */
+        if (error != HA_ERR_RECORD_CHANGED && error != HA_ERR_WRONG_COMMAND)
+          sql_print_error("mysql_ha_read: Got error %d when reading "
+                          "table '%s'",
+                          error, tables->table_name);
         table->file->print_error(error,MYF(0));
         goto err;
       }