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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 Sun Microsystems, Inc.
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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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/* Copyright (C) 2000-2006 MySQL AB
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* Definitions for parameters to do with handler-routines */
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface /* gcc class implementation */
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#include <my_handler.h>
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#define NO_HASH /* Not yet implemented */
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// the following is for checking tables
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#define HA_ADMIN_ALREADY_DONE 1
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#define HA_ADMIN_NOT_IMPLEMENTED -1
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#define HA_ADMIN_FAILED -2
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#define HA_ADMIN_CORRUPT -3
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#define HA_ADMIN_INTERNAL_ERROR -4
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#define HA_ADMIN_INVALID -5
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#define HA_ADMIN_REJECT -6
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#define HA_ADMIN_TRY_ALTER -7
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#define HA_ADMIN_WRONG_CHECKSUM -8
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#define HA_ADMIN_NOT_BASE_TABLE -9
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#define HA_ADMIN_NEEDS_UPGRADE -10
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#define HA_ADMIN_NEEDS_ALTER -11
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#define HA_ADMIN_NEEDS_CHECK -12
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/* Bits to show what an alter table will do */
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#include <sql_bitmap.h>
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#define HA_MAX_ALTER_FLAGS 39
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typedef Bitmap<HA_MAX_ALTER_FLAGS> HA_ALTER_FLAGS;
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#define HA_ADD_INDEX (0)
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#define HA_DROP_INDEX (1)
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#define HA_ALTER_INDEX (2)
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#define HA_RENAME_INDEX (3)
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#define HA_ADD_UNIQUE_INDEX (4)
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#define HA_DROP_UNIQUE_INDEX (5)
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#define HA_ALTER_UNIQUE_INDEX (6)
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#define HA_RENAME_UNIQUE_INDEX (7)
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#define HA_ADD_PK_INDEX (8)
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#define HA_DROP_PK_INDEX (9)
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#define HA_ALTER_PK_INDEX (10)
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#define HA_ADD_COLUMN (11)
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#define HA_DROP_COLUMN (12)
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#define HA_CHANGE_COLUMN (13)
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#define HA_ALTER_COLUMN_NAME (14)
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#define HA_ALTER_COLUMN_TYPE (15)
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#define HA_ALTER_COLUMN_ORDER (16)
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#define HA_ALTER_COLUMN_NULLABLE (17)
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#define HA_COLUMN_DEFAULT_VALUE (18)
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#define HA_COLUMN_STORAGE (19)
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#define HA_COLUMN_FORMAT (20)
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#define HA_ADD_FOREIGN_KEY (21)
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#define HA_DROP_FOREIGN_KEY (22)
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#define HA_ALTER_FOREIGN_KEY (23)
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#define HA_ADD_CONSTRAINT (24)
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#define HA_CHANGE_CHARACTER_SET (30)
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#define HA_SET_DEFAULT_CHARACTER_SET (31)
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#define HA_CHANGE_AUTOINCREMENT_VALUE (32)
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#define HA_ALTER_STORAGE (33)
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#define HA_ALTER_TABLESPACE (34)
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#define HA_ALTER_ROW_FORMAT (35)
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#define HA_RENAME_TABLE (36)
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#define HA_ALTER_STORAGE_ENGINE (37)
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#define HA_RECREATE (38)
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/* Remember to increase HA_MAX_ALTER_FLAGS when adding more flags! */
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/* Return values for check_if_supported_alter */
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#define HA_ALTER_ERROR -1
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#define HA_ALTER_SUPPORTED_WAIT_LOCK 0
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#define HA_ALTER_SUPPORTED_NO_LOCK 1
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#define HA_ALTER_NOT_SUPPORTED 2
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/* Bits in table_flags() to show what database can do */
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#define HA_NO_TRANSACTIONS (1 << 0) /* Doesn't support transactions */
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#define HA_PARTIAL_COLUMN_READ (1 << 1) /* read may not return all columns */
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#define HA_TABLE_SCAN_ON_INDEX (1 << 2) /* No separate data/index file */
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The following should be set if the following is not true when scanning
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a table with rnd_next()
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- We will see all rows (including deleted ones)
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- Row positions are 'table->s->db_record_offset' apart
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If this flag is not set, filesort will do a postion() call for each matched
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row to be able to find the row later.
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#define HA_REC_NOT_IN_SEQ (1 << 3)
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/* This is now a dead option, just left for compatibility */
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#define HA_CAN_GEOMETRY (1 << 4)
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Reading keys in random order is as fast as reading keys in sort order
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(Used in records.cc to decide if we should use a record cache and by
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filesort to decide if we should sort key + data or key + pointer-to-row
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#define HA_FAST_KEY_READ (1 << 5)
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Set the following flag if we on delete should force all key to be read
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and on update read all keys that changes
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#define HA_REQUIRES_KEY_COLUMNS_FOR_DELETE (1 << 6)
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#define HA_NULL_IN_KEY (1 << 7) /* One can have keys with NULL */
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#define HA_DUPLICATE_POS (1 << 8) /* ha_position() gives dup row */
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#define HA_NO_BLOBS (1 << 9) /* Doesn't support blobs */
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#define HA_CAN_INDEX_BLOBS (1 << 10)
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#define HA_AUTO_PART_KEY (1 << 11) /* auto-increment in multi-part key */
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#define HA_REQUIRE_PRIMARY_KEY (1 << 12) /* .. and can't create a hidden one */
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#define HA_STATS_RECORDS_IS_EXACT (1 << 13) /* stats.records is exact */
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INSERT_DELAYED only works with handlers that uses MySQL internal table
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#define HA_CAN_INSERT_DELAYED (1 << 14)
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If we get the primary key columns for free when we do an index read
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It also implies that we have to retrive the primary key when using
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position() and rnd_pos().
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#define HA_PRIMARY_KEY_IN_READ_INDEX (1 << 15)
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If HA_PRIMARY_KEY_REQUIRED_FOR_POSITION is set, it means that to position()
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uses a primary key. Without primary key, we can't call position().
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#define HA_PRIMARY_KEY_REQUIRED_FOR_POSITION (1 << 16)
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#define HA_CAN_RTREEKEYS (1 << 17) /* Historical, no longer supported */
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#define HA_NOT_DELETE_WITH_CACHE (1 << 18)
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The following is we need to a primary key to delete (and update) a row.
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If there is no primary key, all columns needs to be read on update and delete
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#define HA_PRIMARY_KEY_REQUIRED_FOR_DELETE (1 << 19)
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#define HA_NO_PREFIX_CHAR_KEYS (1 << 20)
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#define HA_CAN_FULLTEXT (1 << 21) /* Historical, no longer supported */
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#define HA_CAN_SQL_HANDLER (1 << 22) /* Historical, no longer supported */
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#define HA_NO_AUTO_INCREMENT (1 << 23)
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#define HA_HAS_CHECKSUM (1 << 24)
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/* Table data are stored in separate files (for lower_case_table_names) */
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#define HA_FILE_BASED (1 << 26)
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#define HA_NO_VARCHAR (1 << 27) /* Historical, no longer supported */
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#define HA_CAN_BIT_FIELD (1 << 28) /* Historical, no longer supported */
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#define HA_NEED_READ_RANGE_BUFFER (1 << 29) /* for read_multi_range */
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#define HA_ANY_INDEX_MAY_BE_UNIQUE (1 << 30)
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#define HA_NO_COPY_ON_ALTER (1LL << 31)
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#define HA_HAS_RECORDS (1LL << 32) /* records() gives exact count*/
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/* Has it's own method of binlog logging */
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#define HA_HAS_OWN_BINLOGGING (1LL << 33) /* Historical, no longer supported */
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#define HA_MRR_CANT_SORT (1LL << 34)
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Engine is capable of row-format and statement-format logging,
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#define HA_BINLOG_ROW_CAPABLE (1LL << 35)
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#define HA_BINLOG_STMT_CAPABLE (1LL << 36)
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#define HA_ONLINE_ALTER (1LL << 37)
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Set of all binlog flags. Currently only contain the capabilities
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#ifndef DRIZZLED_CURSOR_H
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#define DRIZZLED_CURSOR_H
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#include <drizzled/atomics.h>
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#include <drizzled/definitions.h>
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#include <drizzled/discrete_interval.h>
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#include <drizzled/error_t.h>
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#include <drizzled/ha_statistics.h>
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#include <drizzled/handler_structs.h>
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#include <drizzled/identifier.h>
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#include <drizzled/key_map.h>
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#include <drizzled/message/table.h>
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#include <drizzled/sql_list.h>
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#include <drizzled/thr_lock.h>
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#include <drizzled/xid.h>
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#include <drizzled/visibility.h>
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#define HA_MAX_ALTER_FLAGS 40
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typedef std::bitset<HA_MAX_ALTER_FLAGS> HA_ALTER_FLAGS;
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#define HA_BINLOG_FLAGS (HA_BINLOG_ROW_CAPABLE | HA_BINLOG_STMT_CAPABLE)
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/* bits in index_flags(index_number) for what you can do with index */
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#define HA_READ_NEXT 1 /* TODO really use this flag */
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#define HA_READ_PREV 2 /* supports ::index_prev */
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#define HA_READ_ORDER 4 /* index_next/prev follow sort order */
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#define HA_READ_RANGE 8 /* can find all records in a range */
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#define HA_ONLY_WHOLE_INDEX 16 /* Can't use part key searches */
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#define HA_KEYREAD_ONLY 64 /* Support HA_EXTRA_KEYREAD */
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Index scan will not return records in rowid order. Not guaranteed to be
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set for unordered (e.g. HASH) indexes.
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#define HA_KEY_SCAN_NOT_ROR 128
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#define HA_DO_INDEX_COND_PUSHDOWN 256 /* Supports Index Condition Pushdown */
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HA_PARTITION_FUNCTION_SUPPORTED indicates that the function is
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HA_FAST_CHANGE_PARTITION means that optimised variants of the changes
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exists but they are not necessarily done online.
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HA_ONLINE_DOUBLE_WRITE means that the handler supports writing to both
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the new partition and to the old partitions when updating through the
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old partitioning schema while performing a change of the partitioning.
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This means that we can support updating of the table while performing
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the copy phase of the change. For no lock at all also a double write
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from new to old must exist and this is not required when this flag is
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This is actually removed even before it was introduced the first time.
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The new idea is that handlers will handle the lock level already in
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store_lock for ALTER TABLE partitions.
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HA_PARTITION_ONE_PHASE is a flag that can be set by handlers that take
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care of changing the partitions online and in one phase. Thus all phases
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needed to handle the change are implemented inside the storage engine.
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The storage engine must also support auto-discovery since the frm file
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is changed as part of the change and this change must be controlled by
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the storage engine. A typical engine to support this is NDB (through
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#define HA_PARTITION_FUNCTION_SUPPORTED (1L << 1)
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#define HA_FAST_CHANGE_PARTITION (1L << 2)
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#define HA_PARTITION_ONE_PHASE (1L << 3)
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/* operations for disable/enable indexes */
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#define HA_KEY_SWITCH_NONUNIQ 0
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#define HA_KEY_SWITCH_ALL 1
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#define HA_KEY_SWITCH_NONUNIQ_SAVE 2
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#define HA_KEY_SWITCH_ALL_SAVE 3
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Note: the following includes binlog and closing 0.
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so: innodb + bdb + ndb + binlog + myisam + myisammrg + archive +
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example + csv + heap + blackhole + federated + 0
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(yes, the sum is deliberately inaccurate)
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TODO remove the limit, use dynarrays
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Parameters for open() (in register form->filestat)
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HA_GET_INFO does an implicit HA_ABORT_IF_LOCKED
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#define HA_OPEN_KEYFILE 1
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#define HA_OPEN_RNDFILE 2
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#define HA_GET_INDEX 4
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#define HA_GET_INFO 8 /* do a ha_info() after open */
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#define HA_READ_ONLY 16 /* File opened as readonly */
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/* Try readonly if can't open with read and write */
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#define HA_TRY_READ_ONLY 32
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#define HA_WAIT_IF_LOCKED 64 /* Wait if locked on open */
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#define HA_ABORT_IF_LOCKED 128 /* skip if locked on open.*/
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#define HA_BLOCK_LOCK 256 /* unlock when reading some records */
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#define HA_OPEN_TEMPORARY 512
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/* For transactional LOCK TABLE. handler::lock_table() */
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#define HA_LOCK_IN_SHARE_MODE F_RDLCK
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#define HA_LOCK_IN_EXCLUSIVE_MODE F_WRLCK
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/* Some key definitions */
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#define HA_KEY_NULL_LENGTH 1
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#define HA_KEY_BLOB_LENGTH 2
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#define HA_LEX_CREATE_TMP_TABLE 1
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#define HA_LEX_CREATE_IF_NOT_EXISTS 2
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#define HA_LEX_CREATE_TABLE_LIKE 4
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#define HA_OPTION_NO_CHECKSUM (1L << 17)
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#define HA_OPTION_NO_DELAY_KEY_WRITE (1L << 18)
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#define HA_MAX_REC_LENGTH 65535
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/* Table caching type */
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#define HA_CACHE_TBL_NONTRANSACT 0
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#define HA_CACHE_TBL_NOCACHE 1
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#define HA_CACHE_TBL_ASKTRANSACT 2
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#define HA_CACHE_TBL_TRANSACT 4
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/* Options of START TRANSACTION statement (and later of SET TRANSACTION stmt) */
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#define MYSQL_START_TRANS_OPT_WITH_CONS_SNAPSHOT 1
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/* Flags for method is_fatal_error */
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#define HA_CHECK_DUP_KEY 1
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#define HA_CHECK_DUP_UNIQUE 2
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#define HA_CHECK_DUP (HA_CHECK_DUP_KEY + HA_CHECK_DUP_UNIQUE)
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DB_TYPE_UNKNOWN=0,DB_TYPE_DIAB_ISAM=1,
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DB_TYPE_HASH,DB_TYPE_MISAM,DB_TYPE_PISAM,
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DB_TYPE_RMS_ISAM, DB_TYPE_HEAP, DB_TYPE_ISAM,
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DB_TYPE_MRG_ISAM, DB_TYPE_MYISAM, DB_TYPE_MRG_MYISAM,
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DB_TYPE_BERKELEY_DB, DB_TYPE_INNODB,
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DB_TYPE_GEMINI, DB_TYPE_NDBCLUSTER,
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DB_TYPE_EXAMPLE_DB, DB_TYPE_ARCHIVE_DB, DB_TYPE_CSV_DB,
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DB_TYPE_FEDERATED_DB,
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DB_TYPE_BLACKHOLE_DB,
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DB_TYPE_PARTITION_DB,
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DB_TYPE_TABLE_FUNCTION,
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DB_TYPE_FIRST_DYNAMIC=42,
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DB_TYPE_DEFAULT=127 // Must be last
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enum row_type { ROW_TYPE_NOT_USED=-1, ROW_TYPE_DEFAULT, ROW_TYPE_FIXED,
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ROW_TYPE_DYNAMIC, ROW_TYPE_COMPRESSED,
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ROW_TYPE_REDUNDANT, ROW_TYPE_COMPACT, ROW_TYPE_PAGE };
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enum column_format_type { COLUMN_FORMAT_TYPE_NOT_USED= -1,
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COLUMN_FORMAT_TYPE_DEFAULT= 0,
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COLUMN_FORMAT_TYPE_FIXED= 1,
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COLUMN_FORMAT_TYPE_DYNAMIC= 2 };
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enum enum_binlog_func {
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BFN_BINLOG_PURGE_FILE= 5
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enum enum_binlog_command {
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/* struct to hold information about the table that should be created */
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/* Bits in used_fields */
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#define HA_CREATE_USED_AUTO (1L << 0)
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#define HA_CREATE_USED_RAID (1L << 1) /* Historical, no longer supported */
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#define HA_CREATE_USED_UNION (1L << 2)
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#define HA_CREATE_USED_INSERT_METHOD (1L << 3)
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#define HA_CREATE_USED_MIN_ROWS (1L << 4)
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#define HA_CREATE_USED_MAX_ROWS (1L << 5)
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#define HA_CREATE_USED_AVG_ROW_LENGTH (1L << 6)
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#define HA_CREATE_USED_PACK_KEYS (1L << 7)
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#define HA_CREATE_USED_CHARSET (1L << 8)
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#define HA_CREATE_USED_DEFAULT_CHARSET (1L << 9)
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#define HA_CREATE_USED_DATADIR (1L << 10)
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#define HA_CREATE_USED_INDEXDIR (1L << 11)
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#define HA_CREATE_USED_ENGINE (1L << 12)
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#define HA_CREATE_USED_CHECKSUM (1L << 13)
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#define HA_CREATE_USED_DELAY_KEY_WRITE (1L << 14)
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#define HA_CREATE_USED_ROW_FORMAT (1L << 15)
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#define HA_CREATE_USED_COMMENT (1L << 16)
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#define HA_CREATE_USED_PASSWORD (1L << 17)
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#define HA_CREATE_USED_CONNECTION (1L << 18)
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#define HA_CREATE_USED_KEY_BLOCK_SIZE (1L << 19)
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#define HA_CREATE_USED_TRANSACTIONAL (1L << 20)
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#define HA_CREATE_USED_PAGE_CHECKSUM (1L << 21)
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typedef uint64_t my_xid; // this line is the same as in log_event.h
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#define MYSQL_XID_PREFIX "MySQLXid"
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#define MYSQL_XID_PREFIX_LEN 8 // must be a multiple of 8
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#define MYSQL_XID_OFFSET (MYSQL_XID_PREFIX_LEN+sizeof(server_id))
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#define MYSQL_XID_GTRID_LEN (MYSQL_XID_OFFSET+sizeof(my_xid))
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#define XIDDATASIZE MYSQL_XIDDATASIZE
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#define MAXGTRIDSIZE 64
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#define MAXBQUALSIZE 64
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#define COMPATIBLE_DATA_YES 0
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#define COMPATIBLE_DATA_NO 1
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struct xid_t is binary compatible with the XID structure as
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in the X/Open CAE Specification, Distributed Transaction Processing:
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The XA Specification, X/Open Company Ltd., 1991.
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http://www.opengroup.org/bookstore/catalog/c193.htm
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@see MYSQL_XID in mysql/plugin.h
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char data[XIDDATASIZE]; // not \0-terminated !
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xid_t() {} /* Remove gcc warning */
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bool eq(struct xid_t *xid)
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{ return eq(xid->gtrid_length, xid->bqual_length, xid->data); }
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bool eq(long g, long b, const char *d)
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{ return g == gtrid_length && b == bqual_length && !memcmp(d, data, g+b); }
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void set(struct xid_t *xid)
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{ memcpy(this, xid, xid->length()); }
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void set(long f, const char *g, long gl, const char *b, long bl)
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memcpy(data, g, gtrid_length= gl);
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memcpy(data+gl, b, bqual_length= bl);
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void set(uint64_t xid)
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set(MYSQL_XID_PREFIX_LEN, 0, MYSQL_XID_PREFIX);
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memcpy(data+MYSQL_XID_PREFIX_LEN, &server_id, sizeof(server_id));
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memcpy(data+MYSQL_XID_OFFSET, &tmp, sizeof(tmp));
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gtrid_length=MYSQL_XID_GTRID_LEN;
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void set(long g, long b, const char *d)
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memcpy(data, d, g+b);
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bool is_null() { return formatID == -1; }
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void null() { formatID= -1; }
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my_xid quick_get_my_xid()
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memcpy(&tmp, data+MYSQL_XID_OFFSET, sizeof(tmp));
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return gtrid_length == MYSQL_XID_GTRID_LEN && bqual_length == 0 &&
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!memcmp(data+MYSQL_XID_PREFIX_LEN, &server_id, sizeof(server_id)) &&
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!memcmp(data, MYSQL_XID_PREFIX, MYSQL_XID_PREFIX_LEN) ?
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quick_get_my_xid() : 0;
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return sizeof(formatID)+sizeof(gtrid_length)+sizeof(bqual_length)+
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gtrid_length+bqual_length;
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return (uchar *)>rid_length;
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return sizeof(gtrid_length)+sizeof(bqual_length)+gtrid_length+bqual_length;
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typedef struct xid_t XID;
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/* for recover() handlerton call */
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#define MIN_XID_LIST_SIZE 128
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#define MAX_XID_LIST_SIZE (1024*128)
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/* The handler for a table type. Will be included in the TABLE structure */
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typedef struct st_table TABLE;
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typedef struct st_table_share TABLE_SHARE;
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struct st_foreign_key_info;
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typedef struct st_foreign_key_info FOREIGN_KEY_INFO;
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typedef bool (stat_print_fn)(THD *thd, const char *type, uint type_len,
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const char *file, uint file_len,
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const char *status, uint status_len);
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enum ha_stat_type { HA_ENGINE_STATUS, HA_ENGINE_LOGS, HA_ENGINE_MUTEX };
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extern st_plugin_int *hton2plugin[MAX_HA];
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handlerton is a singleton structure - one instance per storage engine -
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to provide access to storage engine functionality that works on the
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"global" level (unlike handler class that works on a per-table basis)
479
usually handlerton instance is defined statically in ha_xxx.cc as
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static handlerton { ... } xxx_hton;
483
savepoint_*, prepare, recover, and *_by_xid pointers can be 0.
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Historical marker for if the engine is available of not
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SHOW_COMP_OPTION state;
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Historical number used for frm file to determine the correct storage engine.
494
This is going away and new engines will just use "name" for this.
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enum legacy_db_type db_type;
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each storage engine has it's own memory area (actually a pointer)
499
in the thd, for storing per-connection information.
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thd->ha_data[xxx_hton.slot]
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slot number is initialized by MySQL after xxx_init() is called.
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to store per-savepoint data storage engine is provided with an area
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of a requested size (0 is ok here).
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savepoint_offset must be initialized statically to the size of
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the needed memory to store per-savepoint information.
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After xxx_init it is changed to be an offset to savepoint storage
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area and need not be used by storage engine.
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see binlog_hton and binlog_savepoint_set/rollback for an example.
516
uint savepoint_offset;
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close_connection is only called if
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thd->ha_data[xxx_hton.slot] is non-zero, so even if you don't need
522
this storage area - set it to something, so that MySQL would know
523
this storage engine was accessed in this connection
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int (*close_connection)(handlerton *hton, THD *thd);
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sv points to an uninitialized storage area of requested size
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(see savepoint_offset description)
530
int (*savepoint_set)(handlerton *hton, THD *thd, void *sv);
532
sv points to a storage area, that was earlier passed
533
to the savepoint_set call
535
int (*savepoint_rollback)(handlerton *hton, THD *thd, void *sv);
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int (*savepoint_release)(handlerton *hton, THD *thd, void *sv);
538
'all' is true if it's a real commit, that makes persistent changes
539
'all' is false if it's not in fact a commit but an end of the
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statement that is part of the transaction.
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NOTE 'all' is also false in auto-commit mode where 'end of statement'
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and 'real commit' mean the same event.
544
int (*commit)(handlerton *hton, THD *thd, bool all);
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int (*rollback)(handlerton *hton, THD *thd, bool all);
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int (*prepare)(handlerton *hton, THD *thd, bool all);
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int (*recover)(handlerton *hton, XID *xid_list, uint len);
548
int (*commit_by_xid)(handlerton *hton, XID *xid);
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int (*rollback_by_xid)(handlerton *hton, XID *xid);
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void *(*create_cursor_read_view)(handlerton *hton, THD *thd);
551
void (*set_cursor_read_view)(handlerton *hton, THD *thd, void *read_view);
552
void (*close_cursor_read_view)(handlerton *hton, THD *thd, void *read_view);
553
handler *(*create)(handlerton *hton, TABLE_SHARE *table, MEM_ROOT *mem_root);
554
void (*drop_database)(handlerton *hton, char* path);
555
int (*panic)(handlerton *hton, enum ha_panic_function flag);
556
int (*start_consistent_snapshot)(handlerton *hton, THD *thd);
557
bool (*flush_logs)(handlerton *hton);
558
bool (*show_status)(handlerton *hton, THD *thd, stat_print_fn *print, enum ha_stat_type stat);
559
int (*fill_files_table)(handlerton *hton, THD *thd,
562
uint32 flags; /* global handler flags */
563
int (*release_temporary_latches)(handlerton *hton, THD *thd);
565
int (*discover)(handlerton *hton, THD* thd, const char *db,
569
int (*table_exists_in_engine)(handlerton *hton, THD* thd, const char *db,
571
uint32 license; /* Flag for Engine License */
572
void *data; /* Location for engines to keep personal structures */
576
/* Possible flags of a handlerton (there can be 32 of them) */
577
#define HTON_NO_FLAGS 0
578
#define HTON_CLOSE_CURSORS_AT_COMMIT (1 << 0)
579
#define HTON_ALTER_NOT_SUPPORTED (1 << 1) //Engine does not support alter
580
#define HTON_CAN_RECREATE (1 << 2) //Delete all is used fro truncate
581
#define HTON_HIDDEN (1 << 3) //Engine does not appear in lists
582
#define HTON_FLUSH_AFTER_RENAME (1 << 4)
583
#define HTON_NOT_USER_SELECTABLE (1 << 5)
584
#define HTON_TEMPORARY_NOT_SUPPORTED (1 << 6) //Having temporary tables not supported
585
#define HTON_SUPPORT_LOG_TABLES (1 << 7) //Engine supports log tables
586
#define HTON_NO_PARTITION (1 << 8) //You can not partition these tables
592
/* true is not all entries in the ht[] support 2pc */
594
/* storage engines that registered in this transaction */
595
Ha_trx_info *ha_list;
597
The purpose of this flag is to keep track of non-transactional
598
tables that were modified in scope of:
599
- transaction, when the variable is a member of
601
- top-level statement or sub-statement, when the variable is a
602
member of THD::transaction.stmt
603
This member has the following life cycle:
604
* stmt.modified_non_trans_table is used to keep track of
605
modified non-transactional tables of top-level statements. At
606
the end of the previous statement and at the beginning of the session,
607
it is reset to false. If such functions
608
as mysql_insert, mysql_update, mysql_delete etc modify a
609
non-transactional table, they set this flag to true. At the
610
end of the statement, the value of stmt.modified_non_trans_table
611
is merged with all.modified_non_trans_table and gets reset.
612
* all.modified_non_trans_table is reset at the end of transaction
614
* Since we do not have a dedicated context for execution of a
615
sub-statement, to keep track of non-transactional changes in a
616
sub-statement, we re-use stmt.modified_non_trans_table.
617
At entrance into a sub-statement, a copy of the value of
618
stmt.modified_non_trans_table (containing the changes of the
619
outer statement) is saved on stack. Then
620
stmt.modified_non_trans_table is reset to false and the
621
substatement is executed. Then the new value is merged with the
624
bool modified_non_trans_table;
626
void reset() { no_2pc= false; modified_non_trans_table= false; }
631
Either statement transaction or normal transaction - related
632
thread-specific storage engine data.
634
If a storage engine participates in a statement/transaction,
635
an instance of this class is present in
636
thd->transaction.{stmt|all}.ha_list. The addition to
637
{stmt|all}.ha_list is made by trans_register_ha().
639
When it's time to commit or rollback, each element of ha_list
640
is used to access storage engine's prepare()/commit()/rollback()
641
methods, and also to evaluate if a full two phase commit is
644
@sa General description of transaction handling in handler.cc.
650
/** Register this storage engine in the given transaction context. */
651
void register_ha(THD_TRANS *trans, handlerton *ht_arg)
653
assert(m_flags == 0);
654
assert(m_ht == NULL);
655
assert(m_next == NULL);
658
m_flags= (int) TRX_READ_ONLY; /* Assume read-only at start. */
660
m_next= trans->ha_list;
661
trans->ha_list= this;
664
/** Clear, prepare for reuse. */
672
Ha_trx_info() { reset(); }
674
void set_trx_read_write()
676
assert(is_started());
677
m_flags|= (int) TRX_READ_WRITE;
679
bool is_trx_read_write() const
681
assert(is_started());
682
return m_flags & (int) TRX_READ_WRITE;
684
bool is_started() const { return m_ht != NULL; }
685
/** Mark this transaction read-write if the argument is read-write. */
686
void coalesce_trx_with(const Ha_trx_info *stmt_trx)
689
Must be called only after the transaction has been started.
690
Can be called many times, e.g. when we have many
691
read-write statements in a transaction.
693
assert(is_started());
694
if (stmt_trx->is_trx_read_write())
695
set_trx_read_write();
697
Ha_trx_info *next() const
699
assert(is_started());
702
handlerton *ht() const
704
assert(is_started());
708
enum { TRX_READ_ONLY= 0, TRX_READ_WRITE= 1 };
709
/** Auxiliary, used for ha_list management */
712
Although a given Ha_trx_info instance is currently always used
713
for the same storage engine, 'ht' is not-NULL only when the
714
corresponding storage is a part of a transaction.
718
Transaction flags related to this engine.
719
Not-null only if this instance is a part of transaction.
720
May assume a combination of enum values above.
726
enum enum_tx_isolation { ISO_READ_UNCOMMITTED, ISO_READ_COMMITTED,
727
ISO_REPEATABLE_READ, ISO_SERIALIZABLE};
730
enum ndb_distribution { ND_KEYHASH= 0, ND_LINHASH= 1 };
734
uint64_t data_file_length;
735
uint64_t max_data_file_length;
736
uint64_t index_file_length;
737
uint64_t delete_length;
739
uint32_t mean_rec_length;
746
#define UNDEF_NODEGROUP 65535
55
class Select_Lex_Unit;
64
typedef List<Item> List_item;
748
struct st_table_log_memory_entry;
750
#define NOT_A_PARTITION_ID ((uint32)-1)
752
enum ha_choice { HA_CHOICE_UNDEF, HA_CHOICE_NO, HA_CHOICE_YES };
754
typedef struct st_ha_create_information
756
CHARSET_INFO *table_charset, *default_table_charset;
757
LEX_STRING connect_string;
759
const char *data_file_name, *index_file_name;
761
uint64_t max_rows,min_rows;
762
uint64_t auto_increment_value;
763
uint32_t table_options;
764
uint32_t avg_row_length;
765
uint32_t used_fields;
766
uint32_t key_block_size;
769
enum row_type row_type;
770
uint null_bits; /* NULL bits at start of record */
771
uint options; /* OR of HA_CREATE_ options */
772
uint merge_insert_method;
773
uint extra_size; /* length of extra data segment */
774
/* 0 not used, 1 if not transactional, 2 if transactional */
775
enum ha_choice transactional;
776
bool table_existed; /* 1 in create if table existed */
777
bool frm_only; /* 1 if no ha_create_table() */
778
bool varchar; /* 1 if table has a VARCHAR */
779
enum ha_choice page_checksum; /* If we have page_checksums */
782
typedef struct st_ha_alter_information
784
KEY *key_info_buffer;
786
uint index_drop_count;
787
uint *index_drop_buffer;
788
uint index_add_count;
789
uint *index_add_buffer;
794
typedef struct st_key_create_information
796
enum ha_key_alg algorithm;
798
LEX_STRING parser_name;
804
Class for maintaining hooks used inside operations on tables such
805
as: create table functions, delete table functions, and alter table
808
Class is using the Template Method pattern to separate the public
809
usage interface from the private inheritance interface. This
810
imposes no overhead, since the public non-virtual function is small
811
enough to be inlined.
813
The hooks are usually used for functions that does several things,
814
e.g., create_table_from_items(), which both create a table and lock
821
virtual ~TABLEOP_HOOKS() {}
823
inline void prelock(TABLE **tables, uint count)
825
do_prelock(tables, count);
828
inline int postlock(TABLE **tables, uint count)
830
return do_postlock(tables, count);
833
/* Function primitive that is called prior to locking tables */
834
virtual void do_prelock(TABLE **tables __attribute__((__unused__)),
835
uint count __attribute__((__unused__)))
837
/* Default is to do nothing */
841
Primitive called after tables are locked.
843
If an error is returned, the tables will be unlocked and error
846
@return Error code or zero.
848
virtual int do_postlock(TABLE **tables __attribute__((__unused__)),
849
uint count __attribute__((__unused__)))
851
return 0; /* Default is to do nothing */
855
typedef struct st_savepoint SAVEPOINT;
856
extern uint32_t savepoint_alloc_size;
65
857
extern KEY_CREATE_INFO default_key_create_info;
67
859
/* Forward declaration for condition pushdown to storage engine */
68
860
typedef class Item COND;
70
typedef struct system_status_var system_status_var;
72
namespace optimizer { class CostVector; }
73
namespace plugin { class StorageEngine; }
862
typedef struct st_ha_check_opt
864
st_ha_check_opt() {} /* Remove gcc warning */
865
uint32_t sort_buffer_size;
866
uint flags; /* isam layer flags (e.g. for myisamchk) */
867
uint sql_flags; /* sql layer flags - for something myisamchk cannot do */
868
KEY_CACHE *key_cache; /* new key cache when changing key cache */
875
This is a buffer area that the handler can use to store rows.
876
'end_of_used_area' should be kept updated after calls to
877
read-functions so that other parts of the code can use the
878
remaining area (until next read calls is issued).
881
typedef struct st_handler_buffer
883
uchar *buffer; /* Buffer one can start using */
884
uchar *buffer_end; /* End of buffer */
885
uchar *end_of_used_area; /* End of area that was used by handler */
888
typedef struct system_status_var SSV;
891
typedef void *range_seq_t;
893
typedef struct st_range_seq_if
896
Initialize the traversal of range sequence
900
init_params The seq_init_param parameter
901
n_ranges The number of ranges obtained
902
flags A combination of HA_MRR_SINGLE_POINT, HA_MRR_FIXED_KEY
905
An opaque value to be used as RANGE_SEQ_IF::next() parameter
907
range_seq_t (*init)(void *init_params, uint n_ranges, uint flags);
911
Get the next range in the range sequence
915
seq The value returned by RANGE_SEQ_IF::init()
916
range OUT Information about the next range
919
0 - Ok, the range structure filled with info about the next range
922
uint (*next) (range_seq_t seq, KEY_MULTI_RANGE *range);
925
uint16 &mrr_persistent_flag_storage(range_seq_t seq, uint idx);
926
char* &mrr_get_ptr_by_idx(range_seq_t seq, uint idx);
931
double io_count; /* number of I/O */
932
double avg_io_cost; /* cost of an average I/O oper. */
933
double cpu_cost; /* cost of operations in CPU */
934
double mem_cost; /* cost of used memory */
935
double import_cost; /* cost of remote operations */
938
enum { CPU_COEFF=1 };
939
enum { MEM_COEFF=1 };
940
enum { IMPORT_COEFF=1 };
942
COST_VECT() {} // keep gcc happy
946
return IO_COEFF*io_count*avg_io_cost + CPU_COEFF * cpu_cost +
947
MEM_COEFF*mem_cost + IMPORT_COEFF*import_cost;
953
io_count= cpu_cost= mem_cost= import_cost= 0.0;
956
void multiply(double m)
961
/* Don't multiply mem_cost */
964
void add(const COST_VECT* cost)
966
double io_count_sum= io_count + cost->io_count;
967
add_io(cost->io_count, cost->avg_io_cost);
968
io_count= io_count_sum;
969
cpu_cost += cost->cpu_cost;
971
void add_io(double add_io_cnt, double add_avg_cost)
973
double io_count_sum= io_count + add_io_cnt;
974
avg_io_cost= (io_count * avg_io_cost +
975
add_io_cnt * add_avg_cost) / io_count_sum;
976
io_count= io_count_sum;
980
void get_sweep_read_cost(TABLE *table, ha_rows nrows, bool interrupted,
984
The below two are not used (and not handled) in this milestone of this WL
985
entry because there seems to be no use for them at this stage of
988
#define HA_MRR_SINGLE_POINT 1
989
#define HA_MRR_FIXED_KEY 2
992
Indicates that RANGE_SEQ_IF::next(&range) doesn't need to fill in the
995
#define HA_MRR_NO_ASSOCIATION 4
998
The MRR user will provide ranges in key order, and MRR implementation
999
must return rows in key order.
1001
#define HA_MRR_SORTED 8
1003
/* MRR implementation doesn't have to retrieve full records */
1004
#define HA_MRR_INDEX_ONLY 16
1007
The passed memory buffer is of maximum possible size, the caller can't
1008
assume larger buffer.
1010
#define HA_MRR_LIMITS 32
1014
Flag set <=> default MRR implementation is used
1015
(The choice is made by **_info[_const]() function which may set this
1016
flag. SQL layer remembers the flag value and then passes it to
1017
multi_read_range_init().
1019
#define HA_MRR_USE_DEFAULT_IMPL 64
1022
Used only as parameter to multi_range_read_info():
1023
Flag set <=> the caller guarantees that the bounds of the scanned ranges
1024
will not have NULL values.
1026
#define HA_MRR_NO_NULL_ENDPOINTS 128
1032
uint64_t data_file_length; /* Length off data file */
1033
uint64_t max_data_file_length; /* Length off data file */
1034
uint64_t index_file_length;
1035
uint64_t max_index_file_length;
1036
uint64_t delete_length; /* Free bytes */
1037
uint64_t auto_increment_value;
1039
The number of records in the table.
1040
0 - means the table has exactly 0 rows
1041
other - if (table_flags() & HA_STATS_RECORDS_IS_EXACT)
1042
the value is the exact number of records in the table
1047
ha_rows deleted; /* Deleted records */
1048
uint32_t mean_rec_length; /* physical reclength */
1049
time_t create_time; /* When table was created */
1052
uint block_size; /* index block size */
1055
data_file_length(0), max_data_file_length(0),
1056
index_file_length(0), delete_length(0), auto_increment_value(0),
1057
records(0), deleted(0), mean_rec_length(0), create_time(0),
1058
check_time(0), update_time(0), block_size(0)
1062
uint calculate_key_len(TABLE *, uint, const uchar *, key_part_map);
76
1064
bitmap with first N+1 bits set
77
1065
(keypart_map for a key prefix of [0..N] keyparts)
80
inline key_part_map make_keypart_map(T a)
82
return (((key_part_map)2 << a) - 1);
1067
#define make_keypart_map(N) (((key_part_map)2 << (N)) - 1)
86
1069
bitmap with first N bits set
87
1070
(keypart_map for a key prefix of [0..N-1] keyparts)
90
inline key_part_map make_prev_keypart_map(T a)
92
return (((key_part_map)1 << a) - 1);
1072
#define make_prev_keypart_map(N) (((key_part_map)1 << (N)) - 1)
96
The Cursor class is the interface for dynamically loadable
1075
The handler class is the interface for dynamically loadable
97
1076
storage engines. Do not add ifdefs and take care when adding or
98
1077
changing virtual functions to avoid vtable confusion
226
1196
Discrete_interval auto_inc_interval_for_cur_row;
228
Cursor(plugin::StorageEngine &engine_arg, Table &share_arg);
229
virtual ~Cursor(void);
230
virtual Cursor *clone(memory::Root *mem_root);
1198
handler(handlerton *ht_arg, TABLE_SHARE *share_arg)
1199
:table_share(share_arg), table(0),
1200
estimation_rows_to_insert(0), ht(ht_arg),
1201
ref(0), in_range_check_pushed_down(false),
1202
key_used_on_scan(MAX_KEY), active_index(MAX_KEY),
1203
ref_length(sizeof(my_off_t)),
1205
locked(false), implicit_emptied(0),
1206
pushed_cond(0), pushed_idx_cond(NULL), pushed_idx_cond_keyno(MAX_KEY),
1207
next_insert_id(0), insert_id_for_cur_row(0)
1209
virtual ~handler(void)
1211
assert(locked == false);
1212
/* TODO: assert(inited == NONE); */
1214
virtual handler *clone(MEM_ROOT *mem_root);
1215
/** This is called after create to allow us to set up cached variables */
1218
cached_table_flags= table_flags();
232
1220
/* ha_ methods: pubilc wrappers for private virtual API */
234
int ha_open(const identifier::Table &identifier, int mode, int test_if_locked);
235
int startIndexScan(uint32_t idx, bool sorted) __attribute__ ((warn_unused_result));
237
int startTableScan(bool scan) __attribute__ ((warn_unused_result));
1222
int ha_open(TABLE *table, const char *name, int mode, int test_if_locked);
1223
int ha_index_init(uint idx, bool sorted)
1226
assert(inited==NONE);
1227
if (!(result= index_init(idx, sorted)))
1234
assert(inited==INDEX);
1237
return(index_end());
1239
int ha_rnd_init(bool scan)
1242
assert(inited==NONE || (inited==RND && scan));
1243
inited= (result= rnd_init(scan)) ? NONE: RND;
1248
assert(inited==RND);
241
1253
/* this is necessary in many places, e.g. in HANDLER command */
242
int ha_index_or_rnd_end();
1254
int ha_index_or_rnd_end()
1256
return inited == INDEX ? ha_index_end() : inited == RND ? ha_rnd_end() : 0;
1258
Table_flags ha_table_flags() const { return cached_table_flags; }
245
1260
These functions represent the public interface to *users* of the
246
Cursor class, hence they are *not* virtual. For the inheritance
247
interface, see the (private) functions doInsertRecord(), doUpdateRecord(),
248
and doDeleteRecord() below.
1261
handler class, hence they are *not* virtual. For the inheritance
1262
interface, see the (private) functions write_row(), update_row(),
1263
and delete_row() below.
250
int ha_external_lock(Session *session, int lock_type);
251
int insertRecord(unsigned char * buf) __attribute__ ((warn_unused_result));
252
int updateRecord(const unsigned char * old_data, unsigned char * new_data) __attribute__ ((warn_unused_result));
253
int deleteRecord(const unsigned char * buf) __attribute__ ((warn_unused_result));
1265
int ha_external_lock(THD *thd, int lock_type);
1266
int ha_write_row(uchar * buf);
1267
int ha_update_row(const uchar * old_data, uchar * new_data);
1268
int ha_delete_row(const uchar * buf);
254
1269
void ha_release_auto_increment();
1271
int ha_check_for_upgrade(HA_CHECK_OPT *check_opt);
256
1272
/** to be actually called to get 'check()' functionality*/
257
int ha_check(Session *session, HA_CHECK_OPT *check_opt);
259
void ha_start_bulk_insert(ha_rows rows);
260
int ha_end_bulk_insert();
1273
int ha_check(THD *thd, HA_CHECK_OPT *check_opt);
1274
int ha_repair(THD* thd, HA_CHECK_OPT* check_opt);
1275
void ha_start_bulk_insert(ha_rows rows)
1277
estimation_rows_to_insert= rows;
1278
start_bulk_insert(rows);
1280
int ha_end_bulk_insert()
1282
estimation_rows_to_insert= 0;
1283
return end_bulk_insert();
1285
int ha_bulk_update_row(const uchar *old_data, uchar *new_data,
1286
uint *dup_key_found);
261
1287
int ha_delete_all_rows();
262
1288
int ha_reset_auto_increment(uint64_t value);
263
int ha_analyze(Session* session, HA_CHECK_OPT* check_opt);
265
int ha_disable_indexes(uint32_t mode);
266
int ha_enable_indexes(uint32_t mode);
267
int ha_discard_or_import_tablespace(bool discard);
268
void closeMarkForDelete(const char *name);
1289
int ha_optimize(THD* thd, HA_CHECK_OPT* check_opt);
1290
int ha_analyze(THD* thd, HA_CHECK_OPT* check_opt);
1291
bool ha_check_and_repair(THD *thd);
1292
int ha_disable_indexes(uint mode);
1293
int ha_enable_indexes(uint mode);
1294
int ha_discard_or_import_tablespace(my_bool discard);
1295
void ha_prepare_for_alter();
1296
int ha_rename_table(const char *from, const char *to);
1297
int ha_delete_table(const char *name);
1298
void ha_drop_table(const char *name);
1300
int ha_create(const char *name, TABLE *form, HA_CREATE_INFO *info);
1302
int ha_create_handler_files(const char *name, const char *old_name,
1303
int action_flag, HA_CREATE_INFO *info);
270
1305
void adjust_next_insert_id_after_explicit_value(uint64_t nr);
271
1306
int update_auto_increment();
1307
void print_keydup_error(uint key_nr, const char *msg);
1308
virtual void print_error(int error, myf errflag);
1309
virtual bool get_error_message(int error, String *buf);
1310
uint get_dup_key(int error);
1311
virtual void change_table_ptr(TABLE *table_arg, TABLE_SHARE *share)
273
1316
/* Estimates calculation */
274
1317
virtual double scan_time(void)
275
{ return static_cast<double>(stats.data_file_length) / IO_SIZE + 2; }
276
virtual double read_time(uint32_t, uint32_t ranges, ha_rows rows)
277
{ return ranges + rows; }
279
virtual double index_only_read_time(uint32_t keynr, double records);
281
virtual ha_rows multi_range_read_info_const(uint32_t keyno, RANGE_SEQ_IF *seq,
282
void *seq_init_param,
283
uint32_t n_ranges, uint32_t *bufsz,
284
uint32_t *flags, optimizer::CostVector *cost);
285
virtual int multi_range_read_info(uint32_t keyno, uint32_t n_ranges, uint32_t keys,
286
uint32_t *bufsz, uint32_t *flags, optimizer::CostVector *cost);
1318
{ return uint64_t2double(stats.data_file_length) / IO_SIZE + 2; }
1319
virtual double read_time(uint index __attribute__((__unused__)),
1320
uint ranges, ha_rows rows)
1321
{ return rows2double(ranges+rows); }
1323
virtual double index_only_read_time(uint keynr, double records);
1325
virtual ha_rows multi_range_read_info_const(uint keyno, RANGE_SEQ_IF *seq,
1326
void *seq_init_param,
1327
uint n_ranges, uint *bufsz,
1328
uint *flags, COST_VECT *cost);
1329
virtual int multi_range_read_info(uint keyno, uint n_ranges, uint keys,
1330
uint *bufsz, uint *flags, COST_VECT *cost);
287
1331
virtual int multi_range_read_init(RANGE_SEQ_IF *seq, void *seq_init_param,
288
uint32_t n_ranges, uint32_t mode);
1332
uint n_ranges, uint mode,
1333
HANDLER_BUFFER *buf);
289
1334
virtual int multi_range_read_next(char **range_info);
292
virtual const key_map *keys_to_use_for_scanning();
293
bool has_transactions();
1337
virtual const key_map *keys_to_use_for_scanning() { return &key_map_empty; }
1338
bool has_transactions()
1339
{ return (ha_table_flags() & HA_NO_TRANSACTIONS) == 0; }
1340
virtual uint extra_rec_buf_length() const { return 0; }
296
1343
This method is used to analyse the error to see whether the error
297
1344
is ignorable or not, certain handlers can have more error that are
298
ignorable than others. E.g. the partition Cursor can get inserts
1345
ignorable than others. E.g. the partition handler can get inserts
299
1346
into a range where there is no partition and this is an ignorable
301
1348
HA_ERR_FOUND_DUP_UNIQUE is a special case in MyISAM that means the
302
1349
same thing as HA_ERR_FOUND_DUP_KEY but can in some cases lead to
303
1350
a slightly different error message.
305
virtual bool is_fatal_error(int error, uint32_t flags);
1352
virtual bool is_fatal_error(int error, uint flags)
1355
((flags & HA_CHECK_DUP_KEY) &&
1356
(error == HA_ERR_FOUND_DUPP_KEY ||
1357
error == HA_ERR_FOUND_DUPP_UNIQUE)))
308
1363
Number of rows in table. It will only be called if
309
1364
(table_flags() & (HA_HAS_RECORDS | HA_STATS_RECORDS_IS_EXACT)) != 0
311
virtual ha_rows records();
312
virtual uint64_t tableSize();
313
virtual uint64_t rowSize();
1366
virtual ha_rows records() { return stats.records; }
315
1368
Return upper bound of current number of records in the table
316
1369
(max. of how many records one will retrieve when doing a full table scan)
478
1685
@note that one can NOT rely on table->in_use in store_lock(). It may
479
refer to a different thread if called from abortLockForThread().
1686
refer to a different thread if called from mysql_lock_abort_for_thread().
481
1688
@note If the table is MERGE, store_lock() can return less locks
482
1689
than lock_count() claimed. This can happen when the MERGE children
483
1690
are not attached when this is called from another thread.
485
virtual THR_LOCK_DATA **store_lock(Session *,
1692
virtual THR_LOCK_DATA **store_lock(THD *thd,
486
1693
THR_LOCK_DATA **to,
1694
enum thr_lock_type lock_type)=0;
1696
/** Type of table for caching query */
1697
virtual uint8 table_cache_type() { return HA_CACHE_TBL_NONTRANSACT; }
1701
@brief Register a named table with a call back function to the query cache.
1703
@param thd The thread handle
1704
@param table_key A pointer to the table name in the table cache
1705
@param key_length The length of the table name
1706
@param[out] engine_callback The pointer to the storage engine call back
1708
@param[out] engine_data Storage engine specific data which could be
1711
This method offers the storage engine, the possibility to store a reference
1712
to a table name which is going to be used with query cache.
1713
The method is called each time a statement is written to the cache and can
1714
be used to verify if a specific statement is cachable. It also offers
1715
the possibility to register a generic (but static) call back function which
1716
is called each time a statement is matched against the query cache.
1718
@note If engine_data supplied with this function is different from
1719
engine_data supplied with the callback function, and the callback returns
1720
false, a table invalidation on the current table will occur.
1722
@return Upon success the engine_callback will point to the storage engine
1723
call back function, if any, and engine_data will point to any storage
1724
engine data used in the specific implementation.
1725
@retval true Success
1726
@retval false The specified table or current statement should not be
1731
register_query_cache_table(THD *thd __attribute__((__unused__)),
1732
char *table_key __attribute__((__unused__)),
1733
uint key_length __attribute__((__unused__)),
1734
qc_engine_callback *engine_callback,
1735
uint64_t *engine_data __attribute__((__unused__)))
489
assert(0); // Impossible programming situation
1737
*engine_callback= 0;
495
1743
@retval true Primary key (if there is one) is clustered
496
1744
key covering all fields
497
1745
@retval false otherwise
499
1747
virtual bool primary_key_is_clustered() { return false; }
500
virtual int cmp_ref(const unsigned char *ref1, const unsigned char *ref2)
1748
virtual int cmp_ref(const uchar *ref1, const uchar *ref2)
502
1750
return memcmp(ref1, ref2, ref_length);
505
virtual bool isOrdered(void)
1754
Condition pushdown to storage engines
1758
Push condition down to the table handler.
1760
@param cond Condition to be pushed. The condition tree must not be
1761
modified by the by the caller.
1764
The 'remainder' condition that caller must use to filter out records.
1765
NULL means the handler will not return rows that do not match the
1769
The pushed conditions form a stack (from which one can remove the
1770
last pushed condition using cond_pop).
1771
The table handler filters out rows using (pushed_cond1 AND pushed_cond2
1772
AND ... AND pushed_condN)
1773
or less restrictive condition, depending on handler's capabilities.
1775
handler->ha_reset() call empties the condition stack.
1776
Calls to rnd_init/rnd_end, index_init/index_end etc do not affect the
1779
virtual const COND *cond_push(const COND *cond) { return cond; }
1782
Pop the top condition from the condition stack of the handler instance.
1784
Pops the top if condition stack, if stack is not empty.
1786
virtual void cond_pop(void) { return; }
1789
*idx_cond_push(uint keyno __attribute__((__unused__)),
1790
Item* idx_cond __attribute__((__unused__)))
1791
{ return idx_cond; }
1794
Part of old fast alter table, to be depricated
1797
check_if_incompatible_data(HA_CREATE_INFO *create_info __attribute__((__unused__)),
1798
uint table_changes __attribute__((__unused__)))
1799
{ return COMPATIBLE_DATA_NO; }
1801
/* On-line ALTER TABLE interface */
1804
Check if a storage engine supports a particular alter table on-line
1806
@param altered_table A temporary table show what table is to
1808
@param create_info Information from the parsing phase about new
1810
@param alter_flags Bitmask that shows what will be changed
1811
@param table_changes Shows if table layout has changed (for
1812
backwards compatibility with
1813
check_if_incompatible_data
1815
@retval HA_ALTER_ERROR Unexpected error
1816
@retval HA_ALTER_SUPPORTED_WAIT_LOCK Supported, but requires DDL lock
1817
@retval HA_ALTER_SUPPORTED_NO_LOCK Supported
1818
@retval HA_ALTER_NOT_SUPPORTED Not supported
1821
The default implementation is implemented to support fast
1822
alter table (storage engines that support some changes by
1823
just changing the frm file) without any change in the handler
1827
check_if_supported_alter(TABLE *altered_table __attribute__((__unused__)),
1828
HA_CREATE_INFO *create_info,
1829
HA_ALTER_FLAGS *alter_flags __attribute__((__unused__)),
1832
if (this->check_if_incompatible_data(create_info, table_changes)
1833
== COMPATIBLE_DATA_NO)
1834
return(HA_ALTER_NOT_SUPPORTED);
1836
return(HA_ALTER_SUPPORTED_WAIT_LOCK);
1839
Tell storage engine to prepare for the on-line alter table (pre-alter)
1841
@param thd The thread handle
1842
@param altered_table A temporary table show what table is to
1844
@param alter_info Storage place for data used during phase1
1846
@param alter_flags Bitmask that shows what will be changed
1849
@retval error error code passed from storage engine
1851
virtual int alter_table_phase1(THD *thd __attribute__((__unused__)),
1852
TABLE *altered_table __attribute__((__unused__)),
1853
HA_CREATE_INFO *create_info __attribute__((__unused__)),
1854
HA_ALTER_INFO *alter_info __attribute__((__unused__)),
1855
HA_ALTER_FLAGS *alter_flags __attribute__((__unused__)))
1857
return HA_ERR_UNSUPPORTED;
1860
Tell storage engine to perform the on-line alter table (alter)
1862
@param thd The thread handle
1863
@param altered_table A temporary table show what table is to
1865
@param alter_info Storage place for data used during phase1
1867
@param alter_flags Bitmask that shows what will be changed
1870
@retval error error code passed from storage engine
1873
If check_if_supported_alter returns HA_ALTER_SUPPORTED_WAIT_LOCK
1874
this call is to be wrapped with a DDL lock. This is currently NOT
1877
virtual int alter_table_phase2(THD *thd __attribute__((__unused__)),
1878
TABLE *altered_table __attribute__((__unused__)),
1879
HA_CREATE_INFO *create_info __attribute__((__unused__)),
1880
HA_ALTER_INFO *alter_info __attribute__((__unused__)),
1881
HA_ALTER_FLAGS *alter_flags __attribute__((__unused__)))
1883
return HA_ERR_UNSUPPORTED;
1886
Tell storage engine that changed frm file is now on disk and table
1887
has been re-opened (post-alter)
1889
@param thd The thread handle
1890
@param table The altered table, re-opened
1892
virtual int alter_table_phase3(THD *thd __attribute__((__unused__)),
1893
TABLE *table __attribute__((__unused__)))
1895
return HA_ERR_UNSUPPORTED;
1899
use_hidden_primary_key() is called in case of an update/delete when
1900
(table_flags() and HA_PRIMARY_KEY_REQUIRED_FOR_DELETE) is defined
1901
but we don't have a primary key
1903
virtual void use_hidden_primary_key();
1908
@param thd Thread handle
1909
@param lock_type HA_LOCK_IN_SHARE_MODE (F_RDLCK)
1910
HA_LOCK_IN_EXCLUSIVE_MODE (F_WRLCK)
1911
@param lock_timeout -1 default timeout
1913
>0 wait timeout in milliseconds.
1916
lock_timeout >0 is not used by MySQL currently. If the storage
1917
engine does not support NOWAIT (lock_timeout == 0) it should
1918
return an error. But if it does not support WAIT X (lock_timeout
1919
>0) it should treat it as lock_timeout == -1 and wait a default
1920
(or even hard-coded) timeout.
1922
@retval HA_ERR_WRONG_COMMAND Storage engine does not support
1924
@retval HA_ERR_UNSUPPORTED Storage engine does not support NOWAIT
1925
@retval HA_ERR_LOCK_WAIT_TIMEOUT Lock request timed out or
1926
lock conflict with NOWAIT option
1927
@retval HA_ERR_LOCK_DEADLOCK Deadlock detected
1929
virtual int lock_table(THD *thd __attribute__((unused)),
1930
int lock_type __attribute__((unused)),
1931
int lock_timeout __attribute__((unused)))
1933
return HA_ERR_WRONG_COMMAND;
512
1937
/* Service methods for use by storage engines. */
513
void ha_statistic_increment(uint64_t system_status_var::*offset) const;
514
void **ha_data(Session *) const;
1938
void ha_statistic_increment(ulong SSV::*offset) const;
1939
void **ha_data(THD *) const;
1940
THD *ha_thd(void) const;
1943
Default rename_table() and delete_table() rename/delete files with a
1944
given name and extensions from bas_ext().
1946
These methods can be overridden, but their default implementation
1947
provide useful functionality.
1949
virtual int rename_table(const char *from, const char *to);
1951
Delete a table in the engine. Called for base as well as temporary
1954
virtual int delete_table(const char *name);
517
1957
/* Private helpers */
518
inline void setTransactionReadWrite();
1958
inline void mark_trx_read_write();
521
1961
Low-level primitives for storage engines. These should be
580
2022
@return non-0 in case of failure, 0 in case of success.
581
2023
When lock_type is F_UNLCK, the return value is ignored.
583
virtual int external_lock(Session *, int)
2025
virtual int external_lock(THD *thd __attribute__((unused)),
2026
int lock_type __attribute__((unused)))
587
virtual void release_auto_increment(void) { return; }
2030
virtual void release_auto_increment(void) { return; };
588
2031
/** admin commands - called from mysql_admin_table */
589
virtual int check(Session *)
2032
virtual int check_for_upgrade(HA_CHECK_OPT *check_opt __attribute__((__unused__)))
2034
virtual int check(THD* thd __attribute__((__unused__)),
2035
HA_CHECK_OPT* check_opt __attribute__((__unused__)))
590
2036
{ return HA_ADMIN_NOT_IMPLEMENTED; }
592
virtual void start_bulk_insert(ha_rows)
2039
In this method check_opt can be modified
2040
to specify CHECK option to use to call check()
2043
virtual int repair(THD* thd __attribute__((__unused__)),
2044
HA_CHECK_OPT* check_opt __attribute__((__unused__)))
2045
{ return HA_ADMIN_NOT_IMPLEMENTED; }
2046
virtual void start_bulk_insert(ha_rows rows __attribute__((__unused__)))
594
2048
virtual int end_bulk_insert(void) { return 0; }
595
virtual int index_read(unsigned char *, const unsigned char *,
596
uint32_t, enum ha_rkey_function)
2049
virtual int index_read(uchar * buf __attribute__((__unused__)),
2050
const uchar * key __attribute__((__unused__)),
2051
uint key_len __attribute__((__unused__)),
2052
enum ha_rkey_function find_flag __attribute__((__unused__)))
597
2053
{ return HA_ERR_WRONG_COMMAND; }
598
virtual int index_read_last(unsigned char *, const unsigned char *, uint32_t)
599
{ return (errno= HA_ERR_WRONG_COMMAND); }
2054
virtual int index_read_last(uchar * buf __attribute__((__unused__)),
2055
const uchar * key __attribute__((__unused__)),
2056
uint key_len __attribute__((__unused__)))
2057
{ return (my_errno= HA_ERR_WRONG_COMMAND); }
2059
This method is similar to update_row, however the handler doesn't need
2060
to execute the updates at this point in time. The handler can be certain
2061
that another call to bulk_update_row will occur OR a call to
2062
exec_bulk_update before the set of updates in this query is concluded.
2064
@param old_data Old record
2065
@param new_data New record
2066
@param dup_key_found Number of duplicate keys found
2068
@retval 0 Bulk delete used by handler
2069
@retval 1 Bulk delete not used, normal operation used
2071
virtual int bulk_update_row(const uchar *old_data __attribute__((__unused__)),
2072
uchar *new_data __attribute__((__unused__)),
2073
uint *dup_key_found __attribute__((__unused__)))
2076
return HA_ERR_WRONG_COMMAND;
601
2079
This is called to delete all rows in a table
602
If the Cursor don't support this, then this function will
2080
If the handler don't support this, then this function will
603
2081
return HA_ERR_WRONG_COMMAND and MySQL will delete the rows one
606
2084
virtual int delete_all_rows(void)
607
{ return (errno=HA_ERR_WRONG_COMMAND); }
2085
{ return (my_errno=HA_ERR_WRONG_COMMAND); }
609
2087
Reset the auto-increment counter to the given value, i.e. the next row
610
2088
inserted will get the given value. This is called e.g. after TRUNCATE
611
2089
is emulated by doing a 'DELETE FROM t'. HA_ERR_WRONG_COMMAND is
612
2090
returned by storage engines that don't support this operation.
614
virtual int reset_auto_increment(uint64_t)
615
{ return HA_ERR_WRONG_COMMAND; }
617
virtual int analyze(Session *)
618
{ return HA_ADMIN_NOT_IMPLEMENTED; }
620
virtual int disable_indexes(uint32_t)
621
{ return HA_ERR_WRONG_COMMAND; }
623
virtual int enable_indexes(uint32_t)
624
{ return HA_ERR_WRONG_COMMAND; }
626
virtual int discard_or_import_tablespace(bool)
627
{ return (errno=HA_ERR_WRONG_COMMAND); }
630
@todo this is just for the HEAP engine, it should
631
be removed at some point in the future (and
632
no new engine should ever use it). Right
633
now HEAP does rely on it, so we cannot remove it.
2092
virtual int reset_auto_increment(uint64_t value __attribute__((__unused__)))
2093
{ return HA_ERR_WRONG_COMMAND; }
2094
virtual int optimize(THD* thd __attribute__((__unused__)),
2095
HA_CHECK_OPT* check_opt __attribute__((__unused__)))
2096
{ return HA_ADMIN_NOT_IMPLEMENTED; }
2097
virtual int analyze(THD* thd __attribute__((__unused__)),
2098
HA_CHECK_OPT* check_opt __attribute__((__unused__)))
2099
{ return HA_ADMIN_NOT_IMPLEMENTED; }
2100
virtual bool check_and_repair(THD *thd __attribute__((__unused__)))
2102
virtual int disable_indexes(uint mode __attribute__((__unused__)))
2103
{ return HA_ERR_WRONG_COMMAND; }
2104
virtual int enable_indexes(uint mode __attribute__((__unused__)))
2105
{ return HA_ERR_WRONG_COMMAND; }
2106
virtual int discard_or_import_tablespace(my_bool discard __attribute__((__unused__)))
2107
{ return (my_errno=HA_ERR_WRONG_COMMAND); }
2108
virtual void prepare_for_alter(void) { return; }
635
2109
virtual void drop_table(const char *name);
2110
virtual int create(const char *name __attribute__((__unused__)),
2111
TABLE *form __attribute__((__unused__)),
2112
HA_CREATE_INFO *info __attribute__((__unused__)))=0;
2114
virtual int create_handler_files(const char *name __attribute__((__unused__)),
2115
const char *old_name __attribute__((__unused__)),
2116
int action_flag __attribute__((__unused__)),
2117
HA_CREATE_INFO *info __attribute__((__unused__)))
2124
A Disk-Sweep MRR interface implementation
2126
This implementation makes range (and, in the future, 'ref') scans to read
2127
table rows in disk sweeps.
2129
Currently it is used by MyISAM and InnoDB. Potentially it can be used with
2130
any table handler that has non-clustered indexes and on-disk rows.
2136
typedef void (handler::*range_check_toggle_func_t)(bool on);
2141
handler *h; /* The "owner" handler object. It is used for scanning the index */
2142
TABLE *table; /* Always equal to h->table */
2145
Secondary handler object. It is used to retrieve full table rows by
2150
/* Buffer to store rowids, or (rowid, range_id) pairs */
2152
uchar *rowids_buf_cur; /* Current position when reading/writing */
2153
uchar *rowids_buf_last; /* When reading: end of used buffer space */
2154
uchar *rowids_buf_end; /* End of the buffer */
2156
bool dsmrr_eof; /* true <=> We have reached EOF when reading index tuples */
2158
/* true <=> need range association, buffer holds {rowid, range_id} pairs */
2161
bool use_default_impl; /* true <=> shortcut all calls to default MRR impl */
2163
void init(handler *h_arg, TABLE *table_arg)
2168
int dsmrr_init(handler *h, KEY *key, RANGE_SEQ_IF *seq_funcs,
2169
void *seq_init_param, uint n_ranges, uint mode,
2170
HANDLER_BUFFER *buf);
2172
int dsmrr_fill_buffer(handler *h);
2173
int dsmrr_next(handler *h, char **range_info);
2175
int dsmrr_info(uint keyno, uint n_ranges, uint keys, uint *bufsz,
2176
uint *flags, COST_VECT *cost);
2178
ha_rows dsmrr_info_const(uint keyno, RANGE_SEQ_IF *seq,
2179
void *seq_init_param, uint n_ranges, uint *bufsz,
2180
uint *flags, COST_VECT *cost);
2182
bool key_uses_partial_cols(uint keyno);
2183
bool choose_mrr_impl(uint keyno, ha_rows rows, uint *flags, uint *bufsz,
2185
bool get_disk_sweep_mrr_cost(uint keynr, ha_rows rows, uint flags,
2186
uint *buffer_size, COST_VECT *cost);
638
2189
extern const char *ha_row_type[];
2190
extern const char *tx_isolation_names[];
2191
extern const char *binlog_format_names[];
2192
extern TYPELIB tx_isolation_typelib;
2193
extern TYPELIB myisam_stats_method_typelib;
2194
extern uint32_t total_ha, total_ha_2pc;
2196
/* Wrapper functions */
2197
#define ha_commit(thd) (ha_commit_trans((thd), true))
2198
#define ha_rollback(thd) (ha_rollback_trans((thd), true))
2201
handlerton *ha_default_handlerton(THD *thd);
2202
plugin_ref ha_resolve_by_name(THD *thd, const LEX_STRING *name);
2203
plugin_ref ha_lock_engine(THD *thd, handlerton *hton);
2204
handlerton *ha_resolve_by_legacy_type(THD *thd, enum legacy_db_type db_type);
2205
handler *get_new_handler(TABLE_SHARE *share, MEM_ROOT *alloc,
2206
handlerton *db_type);
2207
handlerton *ha_checktype(THD *thd, enum legacy_db_type database_type,
2208
bool no_substitute, bool report_error);
2211
static inline enum legacy_db_type ha_legacy_type(const handlerton *db_type)
2213
return (db_type == NULL) ? DB_TYPE_UNKNOWN : db_type->db_type;
2216
static inline const char *ha_resolve_storage_engine_name(const handlerton *db_type)
2218
return db_type == NULL ? "UNKNOWN" : hton2plugin[db_type->slot]->name.str;
2221
static inline bool ha_check_storage_engine_flag(const handlerton *db_type, uint32 flag)
2223
return db_type == NULL ? false : test(db_type->flags & flag);
2226
static inline bool ha_storage_engine_is_enabled(const handlerton *db_type)
2228
return (db_type && db_type->create) ?
2229
(db_type->state == SHOW_OPTION_YES) : false;
640
2232
/* basic stuff */
641
void ha_init_errors(void);
644
SortField *make_unireg_sortorder(Order *order, uint32_t *length,
645
SortField *sortorder);
646
int setup_order(Session *session, Item **ref_pointer_array, TableList *tables,
647
List<Item> &fields, List <Item> &all_fields, Order *order);
648
int setup_group(Session *session, Item **ref_pointer_array, TableList *tables,
649
List<Item> &fields, List<Item> &all_fields, Order *order,
650
bool *hidden_group_fields);
651
bool fix_inner_refs(Session *session, List<Item> &all_fields, Select_Lex *select,
652
Item **ref_pointer_array);
654
bool handle_select(Session *session, LEX *lex, select_result *result,
655
uint64_t setup_tables_done_option);
656
void free_underlaid_joins(Session *session, Select_Lex *select);
658
bool handle_derived(LEX *lex, bool (*processor)(Session *session,
661
bool derived_prepare(Session *session, LEX *lex, TableList *t);
662
bool derived_filling(Session *session, LEX *lex, TableList *t);
663
int prepare_create_field(CreateField *sql_field,
664
uint32_t *blob_columns,
665
int *timestamps, int *timestamps_with_niladic);
667
bool create_table(Session *session,
668
const identifier::Table &identifier,
669
HA_CREATE_INFO *create_info,
670
message::Table &table_proto,
671
AlterInfo *alter_info,
672
bool tmp_table, uint32_t select_field_count,
673
bool is_if_not_exists);
675
bool create_table_no_lock(Session *session,
676
const identifier::Table &identifier,
677
HA_CREATE_INFO *create_info,
678
message::Table &table_proto,
679
AlterInfo *alter_info,
680
bool tmp_table, uint32_t select_field_count,
681
bool is_if_not_exists);
683
bool create_like_table(Session* session,
684
identifier::Table::const_reference destination_identifier,
685
identifier::Table::const_reference source_identifier,
686
message::Table &create_table_proto,
687
bool is_if_not_exists,
690
bool rename_table(Session &session,
691
plugin::StorageEngine *base,
692
const identifier::Table &old_identifier,
693
const identifier::Table &new_identifier);
695
bool prepare_update(Session *session, TableList *table_list,
696
Item **conds, uint32_t order_num, Order *order);
697
int update_query(Session *session,TableList *tables,List<Item> &fields,
698
List<Item> &values,COND *conds,
699
uint32_t order_num, Order *order, ha_rows limit,
700
enum enum_duplicates handle_duplicates, bool ignore);
701
bool prepare_insert(Session *session, TableList *table_list, Table *table,
702
List<Item> &fields, List_item *values,
703
List<Item> &update_fields,
704
List<Item> &update_values, enum_duplicates duplic,
705
COND **where, bool select_insert,
706
bool check_fields, bool abort_on_warning);
707
bool insert_query(Session *session,TableList *table,List<Item> &fields,
708
List<List_item> &values, List<Item> &update_fields,
709
List<Item> &update_values, enum_duplicates flag,
711
int check_that_all_fields_are_given_values(Session *session, Table *entry,
712
TableList *table_list);
713
int prepare_delete(Session *session, TableList *table_list, Item **conds);
714
bool delete_query(Session *session, TableList *table_list, COND *conds,
715
SQL_LIST *order, ha_rows rows, uint64_t options,
716
bool reset_auto_increment);
717
bool truncate(Session& session, TableList *table_list);
718
TableShare *get_table_share(Session *session, TableList *table_list, char *key,
719
uint32_t key_length, uint32_t db_flags, int *error);
720
TableShare *get_cached_table_share(const char *db, const char *table_name);
721
bool reopen_name_locked_table(Session* session, TableList* table_list, bool link_in);
722
bool reopen_tables(Session *session,bool get_locks,bool in_refresh);
723
void close_handle_and_leave_table_as_lock(Table *table);
724
bool wait_for_tables(Session *session);
725
bool table_is_used(Table *table, bool wait_for_name_lock);
726
Table *drop_locked_tables(Session *session, const drizzled::identifier::Table &identifier);
727
void abort_locked_tables(Session *session, const drizzled::identifier::Table &identifier);
728
extern Field *not_found_field;
729
extern Field *view_ref_found;
732
find_field_in_tables(Session *session, Item_ident *item,
733
TableList *first_table, TableList *last_table,
734
Item **ref, find_item_error_report_type report_error,
735
bool register_tree_change);
737
find_field_in_table_ref(Session *session, TableList *table_list,
738
const char *name, uint32_t length,
739
const char *item_name, const char *db_name,
740
const char *table_name, Item **ref,
742
uint32_t *cached_field_index_ptr,
743
bool register_tree_change, TableList **actual_table);
745
find_field_in_table(Session *session, Table *table, const char *name, uint32_t length,
746
bool allow_rowid, uint32_t *cached_field_index_ptr);
748
} /* namespace drizzled */
750
#endif /* DRIZZLED_CURSOR_H */
2233
int ha_init_errors(void);
2236
int ha_initialize_handlerton(st_plugin_int *plugin);
2237
int ha_finalize_handlerton(st_plugin_int *plugin);
2239
TYPELIB *ha_known_exts(void);
2240
int ha_panic(enum ha_panic_function flag);
2241
void ha_close_connection(THD* thd);
2242
bool ha_flush_logs(handlerton *db_type);
2243
void ha_drop_database(char* path);
2244
int ha_create_table(THD *thd, const char *path,
2245
const char *db, const char *table_name,
2246
HA_CREATE_INFO *create_info,
2247
bool update_create_info);
2248
int ha_delete_table(THD *thd, handlerton *db_type, const char *path,
2249
const char *db, const char *alias, bool generate_warning);
2251
/* statistics and info */
2252
bool ha_show_status(THD *thd, handlerton *db_type, enum ha_stat_type stat);
2255
int ha_create_table_from_engine(THD* thd, const char *db, const char *name);
2256
int ha_discover(THD* thd, const char* dbname, const char* name,
2257
uchar** frmblob, size_t* frmlen);
2258
int ha_find_files(THD *thd,const char *db,const char *path,
2259
const char *wild, bool dir, List<LEX_STRING>* files);
2260
int ha_table_exists_in_engine(THD* thd, const char* db, const char* name);
2263
extern "C" int ha_init_key_cache(const char *name, KEY_CACHE *key_cache);
2264
int ha_resize_key_cache(KEY_CACHE *key_cache);
2265
int ha_change_key_cache_param(KEY_CACHE *key_cache);
2266
int ha_change_key_cache(KEY_CACHE *old_key_cache, KEY_CACHE *new_key_cache);
2267
int ha_end_key_cache(KEY_CACHE *key_cache);
2269
/* report to InnoDB that control passes to the client */
2270
int ha_release_temporary_latches(THD *thd);
2272
/* transactions: interface to handlerton functions */
2273
int ha_start_consistent_snapshot(THD *thd);
2274
int ha_commit_or_rollback_by_xid(XID *xid, bool commit);
2275
int ha_commit_one_phase(THD *thd, bool all);
2276
int ha_rollback_trans(THD *thd, bool all);
2277
int ha_prepare(THD *thd);
2278
int ha_recover(HASH *commit_list);
2280
/* transactions: these functions never call handlerton functions directly */
2281
int ha_commit_trans(THD *thd, bool all);
2282
int ha_autocommit_or_rollback(THD *thd, int error);
2283
int ha_enable_transaction(THD *thd, bool on);
2286
int ha_rollback_to_savepoint(THD *thd, SAVEPOINT *sv);
2287
int ha_savepoint(THD *thd, SAVEPOINT *sv);
2288
int ha_release_savepoint(THD *thd, SAVEPOINT *sv);
2290
/* these are called by storage engines */
2291
void trans_register_ha(THD *thd, bool all, handlerton *ht);
2294
Storage engine has to assume the transaction will end up with 2pc if
2295
- there is more than one 2pc-capable storage engine available
2296
- in the current transaction 2pc was not disabled yet
2298
#define trans_need_2pc(thd, all) ((total_ha_2pc > 1) && \
2299
!((all ? &thd->transaction.all : &thd->transaction.stmt)->no_2pc))
2301
#ifdef HAVE_NDB_BINLOG
2302
int ha_reset_logs(THD *thd);
2303
int ha_binlog_index_purge_file(THD *thd, const char *file);
2304
void ha_reset_slave(THD *thd);
2305
void ha_binlog_log_query(THD *thd, handlerton *db_type,
2306
enum_binlog_command binlog_command,
2307
const char *query, uint query_length,
2308
const char *db, const char *table_name);
2309
void ha_binlog_wait(THD *thd);
2310
int ha_binlog_end(THD *thd);
2312
#define ha_reset_logs(a) do {} while (0)
2313
#define ha_binlog_index_purge_file(a,b) do {} while (0)
2314
#define ha_reset_slave(a) do {} while (0)
2315
#define ha_binlog_log_query(a,b,c,d,e,f,g) do {} while (0)
2316
#define ha_binlog_wait(a) do {} while (0)
2317
#define ha_binlog_end(a) do {} while (0)