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174 lines
7.2 KiB
174 lines
7.2 KiB
5 months ago
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#ifndef DD_SQL_VIEW_INCLUDED
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#define DD_SQL_VIEW_INCLUDED
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/* Copyright (c) 2016, 2019, 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, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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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, version 2.0, 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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#include "mysql/psi/psi_base.h"
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#include "prealloced_array.h"
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class THD;
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class sp_name;
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struct TABLE_LIST;
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/**
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Guard class which allows to invalidate TDC entries for specific tables/views.
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We use it to get rid of TABLE_SHARE objects corresponding to tables/views
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which definitions are not committed yet (and possibly won't be!).
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*/
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class Uncommitted_tables_guard {
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public:
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Uncommitted_tables_guard(THD *thd)
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: m_thd(thd), m_uncommitted_tables(PSI_INSTRUMENT_ME) {}
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~Uncommitted_tables_guard();
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void add_table(TABLE_LIST *table) { m_uncommitted_tables.push_back(table); }
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private:
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THD *m_thd;
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Prealloced_array<TABLE_LIST *, 1> m_uncommitted_tables;
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};
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/**
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Update metadata of views referencing the table.
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@param thd Thread handle.
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@param db_name Database name.
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@param table_name Update metadata of views referencing
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this table.
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@param commit_dd_changes Indicates whether changes to DD need
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to be committed.
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@param[in,out] uncommitted_tables Helper class to store list of views
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which shares need to be removed from
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TDC if we fail to commit changes to
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DD. Only used if commit_dd_changes
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is false.
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@note In case when commit_dd_changes is false, the caller must rollback
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both statement and transaction on failure, before any further
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accesses to DD. This is because such a failure might be caused by
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a deadlock, which requires rollback before any other operations on
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SE (including reads using attachable transactions) can be done.
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If case when commit_dd_changes is true this function will handle
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transaction rollback itself.
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@retval false Success.
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@retval true Failure.
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*/
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bool update_referencing_views_metadata(
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THD *thd, const char *db_name, const char *table_name,
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bool commit_dd_changes, Uncommitted_tables_guard *uncommitted_tables);
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/**
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Update metadata of views referencing the table.
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@param thd Thread handle.
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@param table Update metadata of views referencing
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this table.
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@param commit_dd_changes Indicates whether changes to DD need
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to be committed.
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@param[in,out] uncommitted_tables Helper class to store list of views
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which shares need to be removed from
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TDC if we fail to commit changes to
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DD. Only used if commit_dd_changes
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is false.
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@note In case when commit_dd_changes is false, the caller must rollback
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both statement and transaction on failure, before any further
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accesses to DD. This is because such a failure might be caused by
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a deadlock, which requires rollback before any other operations on
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SE (including reads using attachable transactions) can be done.
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If case when commit_dd_changes is true this function will handle
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transaction rollback itself.
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@retval false Success.
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@retval true Failure.
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*/
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bool update_referencing_views_metadata(
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THD *thd, const TABLE_LIST *table, bool commit_dd_changes,
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Uncommitted_tables_guard *uncommitted_tables);
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/**
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Update metadata of views referencing "table" being renamed and views
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referencing (if there any) new table name "new_db.new_table_name".
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@param thd Thread handle.
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@param table Update metadata of views referencing this
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table.
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@param new_db New db name set in the rename operation.
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@param new_table_name New table name set in the rename
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@param commit_dd_changes Indicates whether changes to DD need
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to be committed.
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@param[in,out] uncommitted_tables Helper class to store list of views
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which shares need to be removed from
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TDC if we fail to commit changes to
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DD. Only used if commit_dd_changes
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is false.
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@note In case when commit_dd_changes is false, the caller must rollback
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both statement and transaction on failure, before any further
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accesses to DD. This is because such a failure might be caused by
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a deadlock, which requires rollback before any other operations on
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SE (including reads using attachable transactions) can be done.
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If case when commit_dd_changes is true this function will handle
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transaction rollback itself.
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operation.
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@retval false Success.
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@retval true Failure.
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*/
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bool update_referencing_views_metadata(
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THD *thd, const TABLE_LIST *table, const char *new_db,
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const char *new_table_name, bool commit_dd_changes,
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Uncommitted_tables_guard *uncommitted_tables);
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/**
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Method to update metadata of views using stored function.
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@param thd Thread handle.
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@param spname Name of the stored function.
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@retval false Success.
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@retval true Failure.
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*/
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bool update_referencing_views_metadata(THD *thd, const sp_name *spname);
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/**
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Push error or warnings in case a view is invalid and return
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the error message to the caller.
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@param thd Thread handle.
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@param db Database name.
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@param view_name View name.
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returns The error/warning message string.
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*/
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std::string push_view_warning_or_error(THD *thd, const char *db,
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const char *view_name);
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#endif // DD_SQL_VIEW_INCLUDED
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