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23f9e34256
XA support for online alter was totally missing. Tying on binlog_hton made this hardly visible: simply having binlog_commit called from xa_commit made an impression that it will automagically work for online alter, which turns out wrong: all binlog does is writes "XA END" into trx cache and flushes it to a real binlog. In comparison, online alter can't do the same, since online replication happens in a single transaction. Solution: make a dedicated XA support. * Extend struct xid_t with a pointer to Online_alter_cache_list * On prepare: move online alter cache from THD::ha_data to XID passed * On XA commit/rollback: use the online alter cache stored in this XID. This makes us pass xid_cache_element->xid to xa_commit/xa_rollback instead of lex->xid * Use manual memory management for online alter cache list, instead of mem_root allocation, since we don't have mem_root connected to the XA transaction.
60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
#ifndef XA_INCLUDED
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#define XA_INCLUDED
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/*
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Copyright (c) 2000, 2016, Oracle and/or its affiliates.
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Copyright (c) 2009, 2019, MariaDB Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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class XID_cache_element;
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enum xa_states
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{
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XA_ACTIVE= 0,
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XA_IDLE,
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XA_PREPARED,
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XA_ROLLBACK_ONLY,
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XA_NO_STATE
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};
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struct XID_STATE {
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XID_cache_element *xid_cache_element;
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bool check_has_uncommitted_xa() const;
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bool is_explicit_XA() const { return xid_cache_element != 0; }
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void set_error(uint error);
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void set_online_alter_cache(Online_alter_cache_list *);
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void er_xaer_rmfail() const;
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XID *get_xid() const;
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enum xa_states get_state_code() const;
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};
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void xid_cache_init(void);
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void xid_cache_free(void);
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bool xid_cache_insert(XID *xid);
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bool xid_cache_insert(THD *thd, XID_STATE *xid_state, XID *xid);
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void xid_cache_delete(THD *thd, XID_STATE *xid_state);
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bool trans_xa_start(THD *thd);
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bool trans_xa_end(THD *thd);
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bool trans_xa_prepare(THD *thd);
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bool trans_xa_commit(THD *thd);
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bool trans_xa_rollback(THD *thd);
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bool trans_xa_detach(THD *thd);
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bool mysql_xa_recover(THD *thd);
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void xa_recover_get_fields(THD *thd, List<Item> *field_list,
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my_hash_walk_action *action);
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#endif /* XA_INCLUDED */
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