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123 lines
3.8 KiB
123 lines
3.8 KiB
/* Copyright (c) 2006, 2017, 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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#ifndef SQL_HANDLER_INCLUDED
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#define SQL_HANDLER_INCLUDED
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#include "my_base.h" /* ha_rkey_function, ha_rows */
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#include "my_sqlcommand.h"
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#include "sql/sql_cmd.h" // Sql_cmd
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class Item;
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class THD;
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struct TABLE_LIST;
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enum class enum_ha_read_modes { RFIRST, RNEXT, RPREV, RLAST, RKEY, RNEXT_SAME };
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template <class T>
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class List;
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/**
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Sql_cmd_handler_open represents HANDLER OPEN statement.
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@note Some information about this statement, for example, table to be
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opened is still kept in LEX class.
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*/
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class Sql_cmd_handler_open : public Sql_cmd {
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public:
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Sql_cmd_handler_open() {}
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virtual ~Sql_cmd_handler_open() {}
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virtual enum_sql_command sql_command_code() const { return SQLCOM_HA_OPEN; }
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virtual bool execute(THD *thd);
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};
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/**
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Sql_cmd_handler_read represents HANDLER READ statement.
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@note Some information about this statement, for example, table
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list element which identifies HANDLER to be read from,
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WHERE and LIMIT clauses is still kept in LEX class.
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*/
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class Sql_cmd_handler_read : public Sql_cmd {
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public:
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Sql_cmd_handler_read(enum_ha_read_modes read_mode, const char *key_name,
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List<Item> *key_expr, ha_rkey_function rkey_mode)
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: m_read_mode(read_mode),
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m_key_name(key_name),
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m_key_expr(key_expr),
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m_rkey_mode(rkey_mode) {}
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virtual ~Sql_cmd_handler_read() {}
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virtual enum_sql_command sql_command_code() const { return SQLCOM_HA_READ; }
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virtual bool execute(THD *thd);
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private:
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/** Read mode for HANDLER READ: FIRST, NEXT, LAST, ... */
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enum_ha_read_modes m_read_mode;
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/**
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Name of key to be used for reading,
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NULL in cases when natural row-order is to be used.
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*/
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const char *m_key_name;
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/** Key values to be satisfied. */
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List<Item> *m_key_expr;
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/** Type of condition for key values to be satisfied. */
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enum ha_rkey_function m_rkey_mode;
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};
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/**
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Sql_cmd_handler_close represents HANDLER CLOSE statement.
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@note Table list element which identifies HANDLER to be closed
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still resides in LEX class.
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*/
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class Sql_cmd_handler_close : public Sql_cmd {
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public:
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Sql_cmd_handler_close() {}
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virtual ~Sql_cmd_handler_close() {}
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virtual enum_sql_command sql_command_code() const { return SQLCOM_HA_CLOSE; }
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virtual bool execute(THD *thd);
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};
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void mysql_ha_flush(THD *thd);
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void mysql_ha_flush_tables(THD *thd, TABLE_LIST *all_tables);
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void mysql_ha_flush_table(THD *thd, const char *db_name,
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const char *table_name);
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void mysql_ha_rm_tables(THD *thd, TABLE_LIST *tables);
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void mysql_ha_rm_temporary_tables(THD *thd);
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void mysql_ha_cleanup(THD *thd);
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void mysql_ha_set_explicit_lock_duration(THD *thd);
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#endif /* SQL_HANDLER_INCLUDED */
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