From c4ff5981886baee63913cff212e3a99598a04a21 Mon Sep 17 00:00:00 2001
From: unknown <konstantin@mysql.com>
Date: Wed, 20 Jul 2005 20:02:36 +0400
Subject: Implement MySQL framework to support consistent read views in
 cursors. This should fix Bug#11813 when InnoDB part is in (tested with a
 draft patch). The idea of the patch is that if a storage engine supports
 consistent read views, we open one when open a cursor, set is as the active
 view when fetch from the cursor, and close together with cursor close.

sql/examples/ha_archive.cc:
  - extend handlerton with cursors methods; fix coding style
sql/examples/ha_example.cc:
  - extend handlerton with cursors methods; fix coding style
sql/examples/ha_tina.cc:
  - extend handlerton with cursors methods; fix coding style
sql/ha_berkeley.cc:
  - extend handlerton with cursors methods
sql/ha_blackhole.cc:
  - extend handlerton with cursors methods; fix coding style
sql/ha_federated.cc:
  - extend handlerton with cursors methods; fix coding style
sql/ha_heap.cc:
  - extend handlerton with cursors methods; fix coding style
sql/ha_innodb.cc:
  - extend handlerton with cursors methods
sql/ha_myisam.cc:
  - extend handlerton with cursors methods; fix coding style
sql/ha_myisammrg.cc:
  - extend handlerton with cursors methods; fix coding style
sql/ha_ndbcluster.cc:
  - extend handlerton with cursors methods
sql/handler.h:
  - extend handlerton with cursors methods
sql/sql_select.cc:
  - create a consistent read view when we open a cursor,
    set it for a fetch, and free when we closing the cursor.
sql/sql_select.h:
  - add Cursor::ht_info to remember read views used in a cursor.
tests/mysql_client_test.c:
  Disable an assert that will be no longer valid when consistent
  read views in InnoDB are used.
---
 sql/ha_blackhole.cc | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

(limited to 'sql/ha_blackhole.cc')

diff --git a/sql/ha_blackhole.cc b/sql/ha_blackhole.cc
index ae6952d4e5b..43a286a541f 100644
--- a/sql/ha_blackhole.cc
+++ b/sql/ha_blackhole.cc
@@ -30,16 +30,19 @@ static handlerton blackhole_hton= {
   "BLACKHOLE",
   0,       /* slot */
   0,       /* savepoint size. */
-  0,       /* close_connection */
-  0,       /* savepoint */
-  0,       /* rollback to savepoint */
-  0,       /* release savepoint */
-  0,       /* commit */
-  0,       /* rollback */
-  0,       /* prepare */
-  0,       /* recover */
-  0,       /* commit_by_xid */
-  0,       /* rollback_by_xid */
+  NULL,    /* close_connection */
+  NULL,    /* savepoint */
+  NULL,    /* rollback to savepoint */
+  NULL,    /* release savepoint */
+  NULL,    /* commit */
+  NULL,    /* rollback */
+  NULL,    /* prepare */
+  NULL,    /* recover */
+  NULL,    /* commit_by_xid */
+  NULL,    /* rollback_by_xid */
+  NULL,    /* create_cursor_read_view */
+  NULL,    /* set_cursor_read_view */
+  NULL,    /* close_cursor_read_view */
   HTON_NO_FLAGS
 };
 
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