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mariadb/storage/innobase/include/mtr0mtr.h
aivanov@mysql.com d33b523271 Applied innodb-5.1-ss269 snapshot. 
Fixed BUGS:
  #3300: "UPDATE statement with no index column in where condition locks
    all rows"
    Implement semi-consistent read to reduce lock conflicts at the cost
    of breaking serializability.
    ha_innobase::unlock_row(): reset the "did semi consistent read" flag
    ha_innobase::was_semi_consistent_read(),
    ha_innobase::try_semi_consistent_read(): new methods
    row_prebuilt_t, row_create_prebuilt(): add field row_read_type for
    keeping track of semi-consistent reads
    row_vers_build_for_semi_consistent_read(),
    row_sel_build_committed_vers_for_mysql(): new functions
    row_search_for_mysql(): implement semi-consistent reads

  #9802: "Foreign key checks disallow alter table".
    Added test cases.

  #12456: "Cursor shows incorrect data - DML does not affect,
    probably caching"
    This patch implements a high-granularity read view to be used with
    cursors. In this high-granularity consistent read view modifications 
    done by the creating transaction after the cursor is created or 
   future transactions are not visible. But those modifications that 
   transaction did before the cursor was created are visible.

  #12701: "Support >4GB buffer pool and log files on 64-bit Windows"
    Do not call os_file_create_tmpfile() at runtime. Instead, create all
    tempfiles at startup and guard access to them with mutexes.

  #13778: "If FOREIGN_KEY_CHECKS=0, one can create inconsistent FOREIGN KEYs".
    When FOREIGN_KEY_CHECKS=0 we still need to check that datatypes between
    foreign key references are compatible.

  #14189: "VARBINARY and BINARY variables: trailing space ignored with InnoDB"
    innobase_init(): Assert that
    DATA_MYSQL_BINARY_CHARSET_COLL == my_charset_bin.number.
    dtype_get_pad_char(): Do not pad VARBINARY or BINARY columns.
    row_ins_cascade_calc_update_vec(): Refuse ON UPDATE CASCADE when trying
    to change the length of a VARBINARY column that refers to or is referenced
    by a BINARY column. BINARY columns are no longer padded on comparison,
    and thus they cannot be padded on storage either.

  #14747: "Race condition can cause btr_search_drop_page_hash_index() to crash"
    Note that buf_block_t::index should be protected by btr_search_latch
    or an s-latch or x-latch on the index page.
    btr_search_drop_page_hash_index(): Read block->index while holding
    btr_search_latch and use the cached value in the loop.  Remove some
    redundant assertions.

  #15108: "mysqld crashes when innodb_log_file_size is set > 4G"

  #15308: "Problem of Order with Enum Column in Primary Key"

  #15550: "mysqld crashes in printing a FOREIGN KEY error in InnoDB"
    row_ins_foreign_report_add_err(): When printing the parent record,
    use the index in the parent table rather than the index in the child table.

  #15653: "Slow inserts to InnoDB if many thousands of .ibd files"
    Keep track on unflushed modifications to file spaces.  When there are tens
    of thousands of file spaces, flushing all files in fil_flush_file_spaces()
    would be very slow.
    fil_flush_file_spaces(): Only flush unflushed file spaces.
    fil_space_t, fil_system_t: Add a list of unflushed spaces.

  #15991: "innodb-file-per-table + symlink database + rename = cr"
   os_file_handle_error(): Map the error codes EXDEV, ENOTDIR, and EISDIR
   to the new code OS_FILE_PATH_ERROR. Treat this code as OS_FILE_PATH_ERROR.
   This fixes the crash on RENAME TABLE when the .ibd file is a symbolic link
   to a different file system.

  #16157: "InnoDB crashes when main location settings are empty"
    This patch is from Heikki.

  #16298: "InnoDB segfaults in INSERTs in upgrade of 4.0 -> 5.0 tables
    with VARCHAR BINARY"
    dict_load_columns(): Set the charset-collation code
    DATA_MYSQL_BINARY_CHARSET_COLL for those binary string columns
    that lack a charset-collation code, i.e., the tables were created
    with an older version of MySQL/InnoDB than 4.1.2.

  #16229: "MySQL/InnoDB uses full explicit table locks in trigger processing"
    Take a InnoDB table lock only if user has explicitly requested a table
    lock. Added some additional comments to store_lock() and external_lock().

  #16387: "InnoDB crash when dropping a foreign key <table>_ibfk_0"
    Do not mistake TABLENAME_ibfk_0 for auto-generated id.
    dict_table_get_highest_foreign_id(): Ignore foreign constraint
    identifiers starting with the pattern TABLENAME_ibfk_0.

  #16582: "InnoDB: Error in an adaptive hash index pointer to page"
    Account for a race condition when dropping the adaptive hash index
    for a B-tree page.
    btr_search_drop_page_hash_index(): Retry the operation if a hash index
    with different parameters was built meanwhile.  Add diagnostics for the
    case that hash node pointers to the page remain.
    btr_search_info_update_hash(), btr_search_info_update_slow():
    Document the parameter "info" as in/out.

  #16814: "SHOW INNODB STATUS format error in LATEST FOREIGN KEY ERROR
    section"
    Add a missing newline to the LAST FOREIGN KEY ERROR section in SHOW
    INNODB STATUS output.
    dict_foreign_error_report(): Always print a newline after invoking
    dict_print_info_on_foreign_key_in_create_format().

  #16827: "Better InnoDB error message if ibdata files omitted from my.cnf"

  #17126: "CHECK TABLE on InnoDB causes a short hang during check of adaptive
    hash"
    CHECK TABLE blocking other queries, by releasing the btr_search_latch
    periodically during the adaptive hash table validation.

  #17405: "Valgrind: conditional jump or move depends on unititialised values"
    buf_block_init(): Reset magic_n, buf_fix_count and io_fix to avoid
    testing uninitialized variables.
2006-03-10 19:22:21 +03:00

344 lines
12 KiB
C
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/******************************************************
Mini-transaction buffer
(c) 1995 Innobase Oy
Created 11/26/1995 Heikki Tuuri
*******************************************************/
#ifndef mtr0mtr_h
#define mtr0mtr_h
#include "univ.i"
#include "mem0mem.h"
#include "dyn0dyn.h"
#include "buf0types.h"
#include "sync0rw.h"
#include "ut0byte.h"
#include "mtr0types.h"
#include "page0types.h"
/* Logging modes for a mini-transaction */
#define MTR_LOG_ALL 21 /* default mode: log all operations
modifying disk-based data */
#define MTR_LOG_NONE 22 /* log no operations */
/*#define MTR_LOG_SPACE 23 */ /* log only operations modifying
file space page allocation data
(operations in fsp0fsp.* ) */
#define MTR_LOG_SHORT_INSERTS 24 /* inserts are logged in a shorter
form */
/* Types for the mlock objects to store in the mtr memo; NOTE that the
first 3 values must be RW_S_LATCH, RW_X_LATCH, RW_NO_LATCH */
#define MTR_MEMO_PAGE_S_FIX RW_S_LATCH
#define MTR_MEMO_PAGE_X_FIX RW_X_LATCH
#define MTR_MEMO_BUF_FIX RW_NO_LATCH
#define MTR_MEMO_MODIFY 54
#define MTR_MEMO_S_LOCK 55
#define MTR_MEMO_X_LOCK 56
/* Log item types: we have made them to be of the type 'byte'
for the compiler to warn if val and type parameters are switched
in a call to mlog_write_ulint. NOTE! For 1 - 8 bytes, the
flag value must give the length also! */
#define MLOG_SINGLE_REC_FLAG 128 /* if the mtr contains only
one log record for one page,
i.e., write_initial_log_record
has been called only once,
this flag is ORed to the type
of that first log record */
#define MLOG_1BYTE (1) /* one byte is written */
#define MLOG_2BYTES (2) /* 2 bytes ... */
#define MLOG_4BYTES (4) /* 4 bytes ... */
#define MLOG_8BYTES (8) /* 8 bytes ... */
#define MLOG_REC_INSERT ((byte)9) /* record insert */
#define MLOG_REC_CLUST_DELETE_MARK ((byte)10) /* mark clustered index record
deleted */
#define MLOG_REC_SEC_DELETE_MARK ((byte)11) /* mark secondary index record
deleted */
#define MLOG_REC_UPDATE_IN_PLACE ((byte)13) /* update of a record,
preserves record field sizes */
#define MLOG_REC_DELETE ((byte)14) /* delete a record from a
page */
#define MLOG_LIST_END_DELETE ((byte)15) /* delete record list end on
index page */
#define MLOG_LIST_START_DELETE ((byte)16) /* delete record list start on
index page */
#define MLOG_LIST_END_COPY_CREATED ((byte)17) /* copy record list end to a
new created index page */
#define MLOG_PAGE_REORGANIZE ((byte)18) /* reorganize an index page */
#define MLOG_PAGE_CREATE ((byte)19) /* create an index page */
#define MLOG_UNDO_INSERT ((byte)20) /* insert entry in an undo
log */
#define MLOG_UNDO_ERASE_END ((byte)21) /* erase an undo log page end */
#define MLOG_UNDO_INIT ((byte)22) /* initialize a page in an
undo log */
#define MLOG_UNDO_HDR_DISCARD ((byte)23) /* discard an update undo log
header */
#define MLOG_UNDO_HDR_REUSE ((byte)24) /* reuse an insert undo log
header */
#define MLOG_UNDO_HDR_CREATE ((byte)25) /* create an undo log header */
#define MLOG_REC_MIN_MARK ((byte)26) /* mark an index record as the
predefined minimum record */
#define MLOG_IBUF_BITMAP_INIT ((byte)27) /* initialize an ibuf bitmap
page */
/*#define MLOG_FULL_PAGE ((byte)28) full contents of a page */
#define MLOG_INIT_FILE_PAGE ((byte)29) /* this means that a file page
is taken into use and the prior
contents of the page should be
ignored: in recovery we must
not trust the lsn values stored
to the file page */
#define MLOG_WRITE_STRING ((byte)30) /* write a string to a page */
#define MLOG_MULTI_REC_END ((byte)31) /* if a single mtr writes
log records for several pages,
this log record ends the
sequence of these records */
#define MLOG_DUMMY_RECORD ((byte)32) /* dummy log record used to
pad a log block full */
#define MLOG_FILE_CREATE ((byte)33) /* log record about an .ibd
file creation */
#define MLOG_FILE_RENAME ((byte)34) /* log record about an .ibd
file rename */
#define MLOG_FILE_DELETE ((byte)35) /* log record about an .ibd
file deletion */
#define MLOG_COMP_REC_MIN_MARK ((byte)36) /* mark a compact index record
as the predefined minimum
record */
#define MLOG_COMP_PAGE_CREATE ((byte)37) /* create a compact
index page */
#define MLOG_COMP_REC_INSERT ((byte)38) /* compact record insert */
#define MLOG_COMP_REC_CLUST_DELETE_MARK ((byte)39)
/* mark compact clustered index
record deleted */
#define MLOG_COMP_REC_SEC_DELETE_MARK ((byte)40)/* mark compact secondary index
record deleted; this log
record type is redundant, as
MLOG_REC_SEC_DELETE_MARK is
independent of the record
format. */
#define MLOG_COMP_REC_UPDATE_IN_PLACE ((byte)41)/* update of a compact record,
preserves record field sizes */
#define MLOG_COMP_REC_DELETE ((byte)42) /* delete a compact record
from a page */
#define MLOG_COMP_LIST_END_DELETE ((byte)43) /* delete compact record list
end on index page */
#define MLOG_COMP_LIST_START_DELETE ((byte)44) /* delete compact record list
start on index page */
#define MLOG_COMP_LIST_END_COPY_CREATED ((byte)45)
/* copy compact record list end
to a new created index page */
#define MLOG_COMP_PAGE_REORGANIZE ((byte)46) /* reorganize an index page */
#define MLOG_BIGGEST_TYPE ((byte)46) /* biggest value (used in
asserts) */
/*******************************************************************
Starts a mini-transaction and creates a mini-transaction handle
and buffer in the memory buffer given by the caller. */
UNIV_INLINE
mtr_t*
mtr_start(
/*======*/
/* out: mtr buffer which also acts as
the mtr handle */
mtr_t* mtr); /* in: memory buffer for the mtr buffer */
/*******************************************************************
Starts a mini-transaction and creates a mini-transaction handle
and buffer in the memory buffer given by the caller. */
mtr_t*
mtr_start_noninline(
/*================*/
/* out: mtr buffer which also acts as
the mtr handle */
mtr_t* mtr); /* in: memory buffer for the mtr buffer */
/*******************************************************************
Commits a mini-transaction. */
void
mtr_commit(
/*=======*/
mtr_t* mtr); /* in: mini-transaction */
/**************************************************************
Sets and returns a savepoint in mtr. */
UNIV_INLINE
ulint
mtr_set_savepoint(
/*==============*/
/* out: savepoint */
mtr_t* mtr); /* in: mtr */
/**************************************************************
Releases the latches stored in an mtr memo down to a savepoint.
NOTE! The mtr must not have made changes to buffer pages after the
savepoint, as these can be handled only by mtr_commit. */
void
mtr_rollback_to_savepoint(
/*======================*/
mtr_t* mtr, /* in: mtr */
ulint savepoint); /* in: savepoint */
/**************************************************************
Releases the (index tree) s-latch stored in an mtr memo after a
savepoint. */
UNIV_INLINE
void
mtr_release_s_latch_at_savepoint(
/*=============================*/
mtr_t* mtr, /* in: mtr */
ulint savepoint, /* in: savepoint */
rw_lock_t* lock); /* in: latch to release */
/*******************************************************************
Gets the logging mode of a mini-transaction. */
UNIV_INLINE
ulint
mtr_get_log_mode(
/*=============*/
/* out: logging mode: MTR_LOG_NONE, ... */
mtr_t* mtr); /* in: mtr */
/*******************************************************************
Changes the logging mode of a mini-transaction. */
UNIV_INLINE
ulint
mtr_set_log_mode(
/*=============*/
/* out: old mode */
mtr_t* mtr, /* in: mtr */
ulint mode); /* in: logging mode: MTR_LOG_NONE, ... */
/************************************************************
Reads 1 - 4 bytes from a file page buffered in the buffer pool. */
ulint
mtr_read_ulint(
/*===========*/
/* out: value read */
byte* ptr, /* in: pointer from where to read */
ulint type, /* in: MLOG_1BYTE, MLOG_2BYTES, MLOG_4BYTES */
mtr_t* mtr); /* in: mini-transaction handle */
/************************************************************
Reads 8 bytes from a file page buffered in the buffer pool. */
dulint
mtr_read_dulint(
/*============*/
/* out: value read */
byte* ptr, /* in: pointer from where to read */
mtr_t* mtr); /* in: mini-transaction handle */
/*************************************************************************
This macro locks an rw-lock in s-mode. */
#define mtr_s_lock(B, MTR) mtr_s_lock_func((B), __FILE__, __LINE__,\
(MTR))
/*************************************************************************
This macro locks an rw-lock in x-mode. */
#define mtr_x_lock(B, MTR) mtr_x_lock_func((B), __FILE__, __LINE__,\
(MTR))
/*************************************************************************
NOTE! Use the macro above!
Locks a lock in s-mode. */
UNIV_INLINE
void
mtr_s_lock_func(
/*============*/
rw_lock_t* lock, /* in: rw-lock */
const char* file, /* in: file name */
ulint line, /* in: line number */
mtr_t* mtr); /* in: mtr */
/*************************************************************************
NOTE! Use the macro above!
Locks a lock in x-mode. */
UNIV_INLINE
void
mtr_x_lock_func(
/*============*/
rw_lock_t* lock, /* in: rw-lock */
const char* file, /* in: file name */
ulint line, /* in: line number */
mtr_t* mtr); /* in: mtr */
/*******************************************************
Releases an object in the memo stack. */
void
mtr_memo_release(
/*=============*/
mtr_t* mtr, /* in: mtr */
void* object, /* in: object */
ulint type); /* in: object type: MTR_MEMO_S_LOCK, ... */
/**************************************************************
Checks if memo contains the given item. */
UNIV_INLINE
ibool
mtr_memo_contains(
/*==============*/
/* out: TRUE if contains */
mtr_t* mtr, /* in: mtr */
void* object, /* in: object to search */
ulint type); /* in: type of object */
/*************************************************************
Prints info of an mtr handle. */
void
mtr_print(
/*======*/
mtr_t* mtr); /* in: mtr */
/*######################################################################*/
#define MTR_BUF_MEMO_SIZE 200 /* number of slots in memo */
/*******************************************************************
Returns the log object of a mini-transaction buffer. */
UNIV_INLINE
dyn_array_t*
mtr_get_log(
/*========*/
/* out: log */
mtr_t* mtr); /* in: mini-transaction */
/*******************************************************
Pushes an object to an mtr memo stack. */
UNIV_INLINE
void
mtr_memo_push(
/*==========*/
mtr_t* mtr, /* in: mtr */
void* object, /* in: object */
ulint type); /* in: object type: MTR_MEMO_S_LOCK, ... */
/* Type definition of a mini-transaction memo stack slot. */
typedef struct mtr_memo_slot_struct mtr_memo_slot_t;
struct mtr_memo_slot_struct{
ulint type; /* type of the stored object (MTR_MEMO_S_LOCK, ...) */
void* object; /* pointer to the object */
};
/* Mini-transaction handle and buffer */
struct mtr_struct{
ulint state; /* MTR_ACTIVE, MTR_COMMITTING, MTR_COMMITTED */
dyn_array_t memo; /* memo stack for locks etc. */
dyn_array_t log; /* mini-transaction log */
ibool modifications;
/* TRUE if the mtr made modifications to
buffer pool pages */
ulint n_log_recs;
/* count of how many page initial log records
have been written to the mtr log */
ulint log_mode; /* specifies which operations should be
logged; default value MTR_LOG_ALL */
dulint start_lsn;/* start lsn of the possible log entry for
this mtr */
dulint end_lsn;/* end lsn of the possible log entry for
this mtr */
ulint magic_n;
};
#define MTR_MAGIC_N 54551
#define MTR_ACTIVE 12231
#define MTR_COMMITTING 56456
#define MTR_COMMITTED 34676
#ifndef UNIV_NONINL
#include "mtr0mtr.ic"
#endif
#endif
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