140 lines
3.9 KiB
C++
140 lines
3.9 KiB
C++
/* Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
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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 St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef RPL_TRANSACTION_WRITE_SET_CTX_H
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#define RPL_TRANSACTION_WRITE_SET_CTX_H
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#include "my_global.h"
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#include <vector>
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#include <map>
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#include <list>
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#include <set>
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#include <string>
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/**
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Server side support to provide a service to plugins to report if
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a given transaction should continue or be aborted.
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Its value is reset on Transaction_ctx::cleanup().
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Its value is set through service service_rpl_transaction_ctx.
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*/
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class Rpl_transaction_write_set_ctx
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{
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public:
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Rpl_transaction_write_set_ctx();
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virtual ~Rpl_transaction_write_set_ctx() {}
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/*
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Function to add the write set of the hash of the PKE in the std::vector
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in the transaction_ctx object.
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@param[in] hash - the uint64 type hash value of the PKE.
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*/
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void add_write_set(uint64 hash);
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/*
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Function to get the pointer of the write set in the
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transaction_ctx object.
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*/
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std::set<uint64> *get_write_set();
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/*
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Cleanup function of the vector which stores the PKE.
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*/
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void clear_write_set();
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/*
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mark transactions that include tables with no pk
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*/
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void set_has_missing_keys();
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/*
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check if the transaction was marked as having missing keys.
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@retval true The transaction accesses tables with no PK.
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@retval false All tables referenced in transaction have PK.
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*/
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bool get_has_missing_keys();
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/*
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mark transactions that include tables referenced by foreign keys
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*/
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void set_has_related_foreign_keys();
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/*
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function to check if the transaction was marked as having missing keys.
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@retval true If the transaction was marked as being referenced by a foreign key
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*/
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bool get_has_related_foreign_keys();
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/**
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Function to add a new SAVEPOINT identifier in the savepoint map in the
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transaction_ctx object.
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@param[in] name - the identifier name of the SAVEPOINT.
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*/
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void add_savepoint(char* name);
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/**
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Function to delete a SAVEPOINT identifier in the savepoint map in the
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transaction_ctx object.
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@param[in] name - the identifier name of the SAVEPOINT.
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*/
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void del_savepoint(char* name);
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/**
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Function to delete all data added to write set and savepoint since
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SAVEPOINT identifier was added to savepoinbt in the transaction_ctx object.
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@param[in] name - the identifier name of the SAVEPOINT.
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*/
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void rollback_to_savepoint(char* name);
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/**
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Function to push savepoint data to a list and clear the savepoint map in
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order to create another identifier context, needed on functions ant trigger.
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*/
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void reset_savepoint_list();
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/**
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Restore previous savepoint map context, called after executed trigger or
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function.
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*/
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void restore_savepoint_list();
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private:
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std::vector<uint64> write_set;
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std::set<uint64> write_set_unique;
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bool m_has_missing_keys;
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bool m_has_related_foreign_keys;
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/**
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Contains information related to SAVEPOINTs. The key on map is the
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identifier and the value is the size of write set when command was
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executed.
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*/
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std::map<std::string, size_t> savepoint;
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/**
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Create a savepoint context hierarchy to support encapsulation of
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identifier name when function or trigger are executed.
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*/
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std::list<std::map<std::string, size_t> > savepoint_list;
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};
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#endif /* RPL_TRANSACTION_WRITE_SET_CTX_H */
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