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BUG#23051 (READ COMMITTED breaks mixed and statement-based

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replication):

Patch to add binlog format capabilities to the InnoDB storage engine.
The engine will not allow statement format logging when in READ COMMITTED
or READ UNCOMMITTED transaction isolation level.

In addition, an error is generated when trying to use READ COMMITTED
or READ UNCOMMITTED transaction isolation level in STATEMENT binlog
mode.
This commit is contained in:
mats@kindahl-laptop.dnsalias.net
2007-06-12 21:47:00 +02:00
parent a979a6c51d
commit 526a0cecda
7 changed files with 264 additions and 12 deletions
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114
mysql-test/r/binlog_innodb.result Normal file
View File

@ -0,0 +1,114 @@
SET BINLOG_FORMAT=MIXED;
RESET MASTER;
CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ENGINE=INNODB;
INSERT INTO t1 VALUES (1,1),(2,2),(3,3),(4,4),(5,5),(6,6);
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
UPDATE t1 SET b = 2*a WHERE a > 1;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
UPDATE t1 SET b = a * a WHERE a > 3;
COMMIT;
SET BINLOG_FORMAT=STATEMENT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
UPDATE t1 SET b = 1*a WHERE a > 1;
ERROR HY000: Logging not possible. Message: InnoDB: Transaction level 'READ-UNCOMMITTED' is not safe for binlog mode 'STATEMENT'
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
UPDATE t1 SET b = 2*a WHERE a > 2;
ERROR HY000: Logging not possible. Message: InnoDB: Transaction level 'READ-COMMITTED' is not safe for binlog mode 'STATEMENT'
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
UPDATE t1 SET b = 3*a WHERE a > 3;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
UPDATE t1 SET b = 4*a WHERE a > 4;
COMMIT;
SET BINLOG_FORMAT=MIXED;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
UPDATE t1 SET b = 1*a WHERE a > 1;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
UPDATE t1 SET b = 2*a WHERE a > 2;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
UPDATE t1 SET b = 3*a WHERE a > 3;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
UPDATE t1 SET b = 4*a WHERE a > 4;
COMMIT;
SET BINLOG_FORMAT=ROW;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
UPDATE t1 SET b = 1*a WHERE a > 1;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
UPDATE t1 SET b = 2*a WHERE a > 2;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
UPDATE t1 SET b = 3*a WHERE a > 3;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
UPDATE t1 SET b = 4*a WHERE a > 4;
COMMIT;
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ENGINE=INNODB
master-bin.000001 # Query # # use `test`; INSERT INTO t1 VALUES (1,1),(2,2),(3,3),(4,4),(5,5),(6,6)
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Query # # use `test`; UPDATE t1 SET b = 2*a WHERE a > 1
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t1)
master-bin.000001 # Update_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Query # # use `test`; UPDATE t1 SET b = 3*a WHERE a > 3
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Query # # use `test`; UPDATE t1 SET b = 4*a WHERE a > 4
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t1)
master-bin.000001 # Update_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t1)
master-bin.000001 # Update_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Query # # use `test`; UPDATE t1 SET b = 3*a WHERE a > 3
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Query # # use `test`; UPDATE t1 SET b = 4*a WHERE a > 4
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t1)
master-bin.000001 # Update_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t1)
master-bin.000001 # Update_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t1)
master-bin.000001 # Update_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t1)
master-bin.000001 # Update_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
DROP TABLE t1;

95
mysql-test/t/binlog_innodb.test Normal file
View File

@ -0,0 +1,95 @@
source include/have_innodb.inc;
SET BINLOG_FORMAT=MIXED;
RESET MASTER;
CREATE TABLE t1 (a INT PRIMARY KEY, b INT) ENGINE=INNODB;
INSERT INTO t1 VALUES (1,1),(2,2),(3,3),(4,4),(5,5),(6,6);
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
# Should be logged as statement
UPDATE t1 SET b = 2*a WHERE a > 1;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
# Should be logged as rows
UPDATE t1 SET b = a * a WHERE a > 3;
COMMIT;
# Check that errors are generated when trying to use READ COMMITTED
# transaction isolation level in STATEMENT binlog mode.
SET BINLOG_FORMAT=STATEMENT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
error ER_BINLOG_LOGGING_IMPOSSIBLE;
UPDATE t1 SET b = 1*a WHERE a > 1;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
error ER_BINLOG_LOGGING_IMPOSSIBLE;
UPDATE t1 SET b = 2*a WHERE a > 2;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
UPDATE t1 SET b = 3*a WHERE a > 3;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
UPDATE t1 SET b = 4*a WHERE a > 4;
COMMIT;
SET BINLOG_FORMAT=MIXED;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
UPDATE t1 SET b = 1*a WHERE a > 1;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
UPDATE t1 SET b = 2*a WHERE a > 2;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
UPDATE t1 SET b = 3*a WHERE a > 3;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
UPDATE t1 SET b = 4*a WHERE a > 4;
COMMIT;
SET BINLOG_FORMAT=ROW;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
UPDATE t1 SET b = 1*a WHERE a > 1;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
UPDATE t1 SET b = 2*a WHERE a > 2;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
UPDATE t1 SET b = 3*a WHERE a > 3;
COMMIT;
BEGIN;
SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
UPDATE t1 SET b = 4*a WHERE a > 4;
COMMIT;
source include/show_binlog_events.inc;
DROP TABLE t1;

2
sql/handler.h
View File

@ -1708,6 +1708,8 @@ private:
/* Some extern variables used with handlers */
extern const char *ha_row_type[];
extern const char *tx_isolation_names[];
extern const char *binlog_format_names[];
extern TYPELIB tx_isolation_typelib;
extern TYPELIB myisam_stats_method_typelib;
extern ulong total_ha, total_ha_2pc;

8
sql/share/errmsg.txt
View File

@ -6062,9 +6062,5 @@ ER_NO_PARTITION_FOR_GIVEN_VALUE_SILENT
ER_BINLOG_UNSAFE_STATEMENT
eng "Statement is not safe to log in statement format."
swe "Detta <20>r inte s<>kert att logga i statement-format."
ER_BINLOG_ENGINES_INCOMPATIBLE
eng "It is not possible to log anything with this combination of engines"
ER_BINLOG_STMT_FORMAT_FORBIDDEN
eng "Attempting to log statement in in statement format, but statement format is not possible with this combination of engines"
ER_BINLOG_ROW_FORMAT_FORBIDDEN
eng "Attempting to log statement in in row format, but row format is not possible with this combination of engines"
ER_BINLOG_LOGGING_IMPOSSIBLE
eng "Binary logging not possible. Message: %s"

13
sql/sql_base.cc
View File

@ -3612,18 +3612,24 @@ int decide_logging_format(THD *thd, TABLE_LIST *tables)
int error= 0;
if (binlog_flags == 0)
{
error= ER_BINLOG_ENGINES_INCOMPATIBLE;
my_error((error= ER_BINLOG_LOGGING_IMPOSSIBLE), MYF(0),
"Statement cannot be logged to the binary log in"
" row-based nor statement-based format");
}
else if (thd->variables.binlog_format == BINLOG_FORMAT_STMT &&
(binlog_flags & HA_BINLOG_STMT_CAPABLE) == 0)
{
error= ER_BINLOG_STMT_FORMAT_FORBIDDEN;
my_error((error= ER_BINLOG_LOGGING_IMPOSSIBLE), MYF(0),
"Statement-based format required for this statement,"
" but not allowed by this combination of engines");
}
else if ((thd->variables.binlog_format == BINLOG_FORMAT_ROW ||
thd->lex->is_stmt_unsafe()) &&
(binlog_flags & HA_BINLOG_ROW_CAPABLE) == 0)
{
error= ER_BINLOG_ROW_FORMAT_FORBIDDEN;
my_error((error= ER_BINLOG_LOGGING_IMPOSSIBLE), MYF(0),
"Row-based format required for this statement,"
" but not allowed by this combination of engines");
}
DBUG_PRINT("info", ("error: %d", error));
@ -3631,7 +3637,6 @@ int decide_logging_format(THD *thd, TABLE_LIST *tables)
if (error)
{
ha_rollback_stmt(thd);
my_error(error, MYF(0));
return -1;
}

40
storage/innobase/handler/ha_innodb.cc
View File

@ -1003,6 +1003,7 @@ ha_innobase::ha_innobase(handlerton *hton, TABLE_SHARE *table_arg)
HA_CAN_SQL_HANDLER |
HA_PRIMARY_KEY_REQUIRED_FOR_POSITION |
HA_PRIMARY_KEY_IN_READ_INDEX |
HA_BINLOG_ROW_CAPABLE |
HA_CAN_GEOMETRY | HA_PARTIAL_COLUMN_READ |
HA_TABLE_SCAN_ON_INDEX),
start_of_scan(0),
@ -2314,6 +2315,45 @@ ha_innobase::get_row_type() const
return(ROW_TYPE_NOT_USED);
}
/********************************************************************
Get the table flags to use for the statement. */
handler::Table_flags
ha_innobase::table_flags() const
{
THD *const thd= current_thd;
/* We are using thd->variables.tx_isolation here instead of
trx->isolation_level since store_lock() has not been called
yet.
The trx->isolation_level is set inside store_lock() (which
is called from mysql_lock_tables()) until after this
function has been called (which is called in lock_tables()
before that function calls mysql_lock_tables()). */
ulong const tx_isolation= thd->variables.tx_isolation;
if (tx_isolation <= ISO_READ_COMMITTED)
{
ulong const binlog_format= thd->variables.binlog_format;
/* Statement based binlogging does not work in these
isolation levels since the necessary locks cannot
be taken */
if (binlog_format == BINLOG_FORMAT_STMT)
{
char buf[256];
my_snprintf(buf, sizeof(buf),
"Transaction level '%s' in InnoDB is"
" not safe for binlog mode '%s'",
tx_isolation_names[tx_isolation],
binlog_format_names[binlog_format]);
my_error(ER_BINLOG_LOGGING_IMPOSSIBLE, MYF(0), buf);
}
return int_table_flags;
}
return int_table_flags | HA_BINLOG_STMT_CAPABLE;
}
/********************************************************************
Gives the file extension of an InnoDB single-table tablespace. */
static const char* ha_innobase_exts[] = {

4
storage/innobase/handler/ha_innodb.h
View File

@ -54,7 +54,7 @@ class ha_innobase: public handler
ulong upd_and_key_val_buff_len;
/* the length of each of the previous
two buffers */
ulong int_table_flags;
Table_flags int_table_flags;
uint primary_key;
ulong start_of_scan; /* this is set to 1 when we are
starting a table scan but have not
@ -84,7 +84,7 @@ class ha_innobase: public handler
const char* table_type() const { return("InnoDB");}
const char *index_type(uint key_number) { return "BTREE"; }
const char** bas_ext() const;
ulonglong table_flags() const { return int_table_flags; }
Table_flags table_flags() const;
ulong index_flags(uint idx, uint part, bool all_parts) const
{
return (HA_READ_NEXT |