The fix is that if the slave has a different integer size than
the master, then they will assume the master has the same signed/unsigned modifier
as the slave.
This means that one can safely change a coon the slave an int to a bigint
or an unsigned int to an unsigned int. Changing an unsigned int to an
signed bigint will cause replication failures when the high bit of the
unsigned int is set.
We can't give an error if the signess is different on the master and slave
as the binary log doesn't contain the signess of the column on the master.
Changing the error message to:
"...from type 'decimal(0,?)/*old*/' to type ' 'decimal(10,7)'..."
So it's now clear that the master data type is OLD decimal.
(MYSQLBINLOG -V CRASHES WITH THAT BINLOG)
Problem: If slave receives a corrupted row event,
slave server is crashing.
Analysis: When slave is unpacking the row event, it is
not validating the data before applying the event. If the
data is corrupted for eg: the length of a field is wrong,
it could end up reading wrong data leading to a crash.
A similar problem happens when mysqlbinlog tool is used
against a corrupted binlog using '-v' option. Due to -v
option, the tool tries to print the values of all the
fields. Corrupted field length could lead to a crash.
Fix: Before unpacking the field, a verification
will be made on the length. If it falls into the event
range, only then it will be unpacked. Otherwise,
"ER_SLAVE_CORRUPT_EVENT" error will be thrown.
Incase mysqlbinlog -v case, the field value will not be
printed and the processing of the file will be stopped.
sql/field.h:
Removed a function which is not required anymore
sql/log_event.cc:
Adding a validation on the field length before
the tool tries to print the value.
sql/log_event.h:
Changing unpack_row call according to the new arguments
sql/log_event_old.h:
Changing unpack_row call according to the new arguments
sql/rpl_record.cc:
Adding a new argument 'row_end' which tells
the end position of the complete data in the
row event. It will be used to do validation
before doing 'unpack' field.
sql/rpl_record.h:
Adding a new argument 'row_end' which tells
the end position of the complete data in the
row event. It will be used to do validation
before doing 'unpack' field.
sql/rpl_utility.cc:
Now calc_field_size() is required for client too.
mysql-test/suite/rpl/r/last_insert_id.result:
Test case for last_insert_id
mysql-test/suite/rpl/t/last_insert_id.cnf:
Test case for last_insert_id
mysql-test/suite/rpl/t/last_insert_id.test:
Test case for last_insert_id
sql/log_event.cc:
Added DBUG_PRINT
Set thd->first_successful_insert_id_in_prev_stmt_for_binlog when setting thd->first_successful_insert_id_in_prev_stmt.
This is required to get last_insert_id() replicated.
This is analog to how read_first_successful_insert_id_in_prev_stmt() works.
sql/rpl_utility.cc:
Added DBUG_PRINT
OF OLD STYLE DECIMALS
Problem: In RBR, Slave is unable to read row buffer
properly when the row event contains MYSQL_TYPE_DECIMAL
(old style decimals) data type column.
Analysis: In RBR, Slave assumes that Master sends
meta data information for all column types like
text,blob,varchar,old decimal,new decimal,float,
and few other types along with row buffer event.
But Master is not sending this meta data information
for old style decimal columns. Hence Slave is crashing
due to unknown precision value for these column types.
Master cannot send this precision value to Slave which
will break replication cross-version compatibility.
Fix: To fix the crash, Slave will now throw error if it
receives old-style decimal datatype. User should
consider changing the old-style decimal to new style
decimal data type by executing "ALTER table modify column"
query as mentioned in http://dev.mysql.com/
doc/refman/5.0/en/upgrading-from-previous-series.html.
Due to not resetting a member (last_added) of
Deferred events class inside a clean up function
(Deferred_log_events::rewind), there is a memory
leak on filtered slaves.
Fix:
Resetting last_added to NULL in rewind() function.
sql/rpl_utility.cc:
Resetting last_added to NULL to avoid memory leak
LESS COLUMNS THAN MASTER
Problem:
========
If DML operation requires a converstion at slave and if slave contains
less number of columns than master, slave is crashing.
Fix:
====
When Slave applies any DML operation, it sees if any of the columns
requires conversion. If yes, it creates conversion table.
While creating the coversion table, it should look into the actual number
of columns required to create the table instead of getting the number
of columns from Master (size()). Columns would have dropped or added
at Slave. So the value should be min(columns@master, columns@slave)
sql/rpl_utility.cc:
loop through only correct number of columns
two tests still fail:
main.innodb_icp and main.range_vs_index_merge_innodb
call records_in_range() with both range ends being open
(which triggers an assert)
MySQL introduced a class Deferred_log_events. This class keeps a pointer
last_added. The code was keeping this pointer around even after the memory
pointed to was freed, and later comparing the bogus pointer against other
allocated memory. This is illegal, and can randomly produce false equal
comparisons depending on whatever the malloc() subsystem decides to return.
BUG#11761686 insert_id event is not filtered.
Two issues are covered.
INSERT into autoincrement field which is not the first part in the composed primary key
is unsafe by autoincrement logging design. The case is specific to MyISAM engine
because Innodb does not allow such table definition.
However no warnings and row-format logging in the MIXED mode was done, and
that is fixed.
Int-, Rand-, User-var log-events were not filtered along with their parent
query that made possible them to screw up execution context of the following
query.
Fixed with deferring their execution until the parent query.
******
Bug#11754117
Post review fixes.
mysql-test/suite/rpl/r/rpl_auto_increment_bug45679.result:
a new result file is added.
mysql-test/suite/rpl/r/rpl_filter_tables_not_exist.result:
results updated.
mysql-test/suite/rpl/t/rpl_auto_increment_bug45679.test:
regression test for BUG#11754117-45670 is added.
mysql-test/suite/rpl/t/rpl_filter_tables_not_exist.test:
regression test for filtering issue of BUG#11754117 - 45670 is added.
sql/log_event.cc:
Logics are added for deferring and executing events associated
with the Query event.
sql/log_event.h:
Interface to deferred events batch execution is added.
sql/rpl_rli.cc:
initialization for new RLI members is added.
sql/rpl_rli.h:
New members to RLI are added to facilitate deferred events gathering
and execution control;
two general character RLI cleanup methods are constructed.
sql/rpl_utility.cc:
Deferred_log_events methods are difined.
sql/rpl_utility.h:
A new class Deferred_log_events is defined to implement
IRU events gathering, execution and cleanup.
sql/slave.cc:
Necessary changes to initialize `rli->deferred_events' and prevent
deferred event deletion in the main read-exec branch.
sql/sql_base.cc:
A new safe-check function for multi-part pk with auto-increment is defined
and deployed in lock_tables().
sql/sql_class.cc:
Initialization for a new member and replication cleanups are added
to THD class.
sql/sql_class.h:
THD class receives a new member to hold a specific execution
context for slave applier.
sql/sql_parse.cc:
Execution of the deferred event in started prior to its parent query.
sql/sql_insert.cc:
CREATE ... IF NOT EXISTS may do nothing, but
it is still not a failure. don't forget to my_ok it.
******
CREATE ... IF NOT EXISTS may do nothing, but
it is still not a failure. don't forget to my_ok it.
sql/sql_table.cc:
small cleanup
******
small cleanup
A lot of small fixes and new test cases.
client/mysqlbinlog.cc:
Cast removed
client/mysqltest.cc:
Added missing DBUG_RETURN
include/my_pthread.h:
set_timespec_time_nsec() now only takes one argument
mysql-test/t/date_formats.test:
Remove --disable_ps_protocl as now also ps supports microseconds
mysys/my_uuid.c:
Changed to use my_interval_timer() instead of my_getsystime()
mysys/waiting_threads.c:
Changed to use my_hrtime()
sql/field.h:
Added bool special_const_compare() for fields that may convert values before compare (like year)
sql/field_conv.cc:
Added test to get optimal copying of identical temporal values.
sql/item.cc:
Return that item_int is equal if it's positive, even if unsigned flag is different.
Fixed Item_cache_str::save_in_field() to have identical null check as other similar functions
Added proper NULL check to Item_cache_int::save_in_field()
sql/item_cmpfunc.cc:
Don't call convert_constant_item() if there is nothing that is worth converting.
Simplified test when years should be converted
sql/item_sum.cc:
Mark cache values in Item_sum_hybrid as not constants to ensure they are not replaced by other cache values in compare_datetime()
sql/item_timefunc.cc:
Changed sec_to_time() to take a my_decimal argument to ensure we don't loose any sub seconds.
Added Item_temporal_func::get_time() (This simplifies some things)
sql/mysql_priv.h:
Added Lazy_string_decimal()
sql/mysqld.cc:
Added my_decimal constants max_seconds_for_time_type, time_second_part_factor
sql/table.cc:
Changed expr_arena to be of type CONVENTIONAL_EXECUTION to ensure that we don't loose any items that are created by fix_fields()
sql/tztime.cc:
TIME_to_gmt_sec() now sets *in_dst_time_gap in case of errors
This is needed to be able to detect if timestamp is 0
storage/maria/lockman.c:
Changed from my_getsystime() to set_timespec_time_nsec()
storage/maria/ma_loghandler.c:
Changed from my_getsystime() to my_hrtime()
storage/maria/ma_recovery.c:
Changed from my_getsystime() to mmicrosecond_interval_timer()
storage/maria/unittest/trnman-t.c:
Changed from my_getsystime() to mmicrosecond_interval_timer()
storage/xtradb/handler/ha_innodb.cc:
Added support for new time,datetime and timestamp
unittest/mysys/thr_template.c:
my_getsystime() -> my_interval_timer()
unittest/mysys/waiting_threads-t.c:
my_getsystime() -> my_interval_timer()
Essentially, the problem is that safemalloc is excruciatingly
slow as it checks all allocated blocks for overrun at each
memory management primitive, yielding a almost exponential
slowdown for the memory management functions (malloc, realloc,
free). The overrun check basically consists of verifying some
bytes of a block for certain magic keys, which catches some
simple forms of overrun. Another minor problem is violation
of aliasing rules and that its own internal list of blocks
is prone to corruption.
Another issue with safemalloc is rather the maintenance cost
as the tool has a significant impact on the server code.
Given the magnitude of memory debuggers available nowadays,
especially those that are provided with the platform malloc
implementation, maintenance of a in-house and largely obsolete
memory debugger becomes a burden that is not worth the effort
due to its slowness and lack of support for detecting more
common forms of heap corruption.
Since there are third-party tools that can provide the same
functionality at a lower or comparable performance cost, the
solution is to simply remove safemalloc. Third-party tools
can provide the same functionality at a lower or comparable
performance cost.
The removal of safemalloc also allows a simplification of the
malloc wrappers, removing quite a bit of kludge: redefinition
of my_malloc, my_free and the removal of the unused second
argument of my_free. Since free() always check whether the
supplied pointer is null, redudant checks are also removed.
Also, this patch adds unit testing for my_malloc and moves
my_realloc implementation into the same file as the other
memory allocation primitives.
client/mysqldump.c:
Pass my_free directly as its signature is compatible with the
callback type -- which wasn't the case for free_table_ent.
This patch:
- Moves all definitions from the mysql_priv.h file into
header files for the component where the variable is
defined
- Creates header files if the component lacks one
- Eliminates all include directives from mysql_priv.h
- Eliminates all circular include cycles
- Rename time.cc to sql_time.cc
- Rename mysql_priv.h to sql_priv.h
for InnoDB
The class Field_bit_as_char stores the metadata for the
field incorrecly because bytes_in_rec and bit_len are set
to (field_length + 7 ) / 8 and 0 respectively, while
Field_bit has the correct values field_length / 8 and
field_length % 8.
Solved the problem by re-computing the values for the
metadata based on the field_length instead of using the
bytes_in_rec and bit_len variables.
To handle compatibility with old server, a table map
flag was added to indicate that the bit computation is
exact. If the flag is clear, the slave computes the
number of bytes required to store the bit field and
compares that instead, effectively allowing replication
*without conversion* from any field length that require
the same number of bytes to store.
mysql-test/suite/rpl/t/rpl_typeconv_innodb.test:
Adding test to check compatibility for bit field
replication when using InnoDB
sql/field.cc:
Extending compatible_field_size() with flags from
table map to allow fields to check master info.
sql/field.h:
Extending compatible_field_size() with flags from
table map to allow fields to check master info.
sql/log.cc:
Removing table map flags since they are not used
outside table map class.
sql/log_event.cc:
Removing flags parameter from table map constructor
since it is not used and does not have to be exposed.
sql/log_event.h:
Adding flag to denote that bit length for bit field type
is exact and not potentially rounded to even bytes.
sql/rpl_utility.cc:
Adding fields to table_def to store table map flags.
sql/rpl_utility.h:
Removing obsolete comment and adding flags to store
table map flags from master.
In BUG#51787 we were using the wrong charset to print out the
data. We were using the field charset for the string that would
hold the information. This caused the assertion, because the
string length was not aligned with UTF32 bytes requirements for
storage.
We fix this by using &my_charset_latin1 in the string object
instead of the field->charset(). As a side-effect, we needed to
extend the show_sql_type interface so that it took the field
charset is now passed as a parameter, so that one is able to
calculate the correct field size.
In BUG#51716 we had issues with Field_string::pack and
Field_string::unpack. When packing, the length was incorrectly
calculated. When unpacking, the padding the string would be
padded with the wrong bytes (a few bytes less than it should).
We fix this by resorting to charset abstractions (functions) that
calculate the correct length when packing and pad correctly the
string when unpacking.
replicating
Replace c_ptr() calls with c_ptr_safe() calls to
avoid valgrind warnings.
Adding code to to handle the case that no metadata
was present in the table map for the column.
Allow first parameter to unpack_row() to be NULL,
in which case no source tables is used and hence
no checks nor conversions are done.
Clarifying some comments and fixing documentation
for unpack_row().
WL#5151 was pushed.
Problem 1: Some old binlog events do not contain metadata. This
makes checking whether the field can be converted or not rather
impossible because one cannot compare, for instance, field sizes
from original table and target table.
Solution 1: When an event does not contain metadata, we will just
check if field types are equal and assume that original field
definition matched with the one in the target table.
Problem 2: There is a second fix, which involves lack of
information regarding maybe_null. This was causing a conditional
jump warning when creating a conversion table.
Solution 2: We will just assume that all fields that need to be
in the conversion table may be null.
Metadata for geometric fields was not being properly stored by
the slave in its the table definition. This happened because
MYSQL_TYPE_GEOMETRY was not included in the 'switch... case' that
handles field metadata according to the field type. Therefore, it
would default to 0, leading to always have a mismatch between
master's field and slave fields'.
We fix this by deploying the missing 'case MYSQL_TYPE_GEOMETRY:'.
mysql-test/extra/rpl_tests/type_conversions.test:
Added some tests for blob fields and also the particular
case for replicating from/into BLOB into/from GEOMETRY.
sql/field.h:
As requested by Mats, reverted function added by him in
changeset:
http://lists.mysql.com/commits/95313
This patch fixes these warnings and some compile time warnings.
On top of that, it also fixes rpl_err_ignoredtable test failure.
This test was failing because the warning suppression text was not
matching the latest text. We fix this by making them match.
mysql-test/suite/rpl/t/rpl_err_ignoredtable.test:
Replaced the suppression text.
sql/rpl_record.cc:
- Fixed some compile time warnings (replaced %d --> %ld and
removed unused mas mask variable.
- Fixed valgrind warnings when using c_ptr(). Replaced with
c_ptr_safe().
sql/rpl_utility.cc:
- Fixed valgrind warnings when using c_ptr(). Replaced with
c_ptr_safe().
for InnoDB
The class Field_bit_as_char stores the metadata for the
field incorrecly because bytes_in_rec and bit_len are set
to (field_length + 7 ) / 8 and 0 respectively, while
Field_bit has the correct values field_length / 8 and
field_length % 8.
Solved the problem by re-computing the values for the
metadata based on the field_length instead of using the
bytes_in_rec and bit_len variables.
To handle compatibility with old server, a table map
flag was added to indicate that the bit computation is
exact. If the flag is clear, the slave computes the
number of bytes required to store the bit field and
compares that instead, effectively allowing replication
*without conversion* from any field length that require
the same number of bytes to store.
mysql-test/suite/rpl/t/rpl_typeconv_innodb.test:
Adding test to check compatibility for bit field
replication when using InnoDB.
sql/field.cc:
Extending compatible_field_size() with flags from
table map to allow fields to check master info.
sql/field.h:
Extending compatible_field_size() with flags from
table map to allow fields to check master info.
sql/log.cc:
Removing table map flags since they are not used
outside table map class.
sql/log_event.cc:
Removing flags parameter from table map constructor
since it is not used and does not have to be exposed.
sql/log_event.h:
Adding flag to denote that bit length for bit field type
is exact and not potentially rounded to even bytes.
sql/rpl_utility.cc:
Adding fields to table_def to store table map flags.
sql/rpl_utility.h:
Removing obsolete comment and adding flags to store
table map flags from master.
Row-based replication requires the types of columns on the
master and slave to be approximately the same (some safe
conversions between strings are allowed), but does not
allow safe conversions between fields of similar types such
as TINYINT and INT.
This patch implement type conversions between similar fields
on the master and slave.
The conversions are controlled using a new variable
SLAVE_TYPE_CONVERSIONS of type SET('ALL_LOSSY','ALL_NON_LOSSY').
Non-lossy conversions are any conversions that do not run the
risk of losing any information, while lossy conversions can
potentially truncate the value. The column definitions are
checked to decide if the conversion is acceptable.
If neither conversion is enabled, it is required that the
definitions of the columns are identical on master and slave.
Conversion is done by creating an internal conversion table,
unpacking the master data into it, and then copy the data to
the real table on the slave.
.bzrignore:
New files added
client/Makefile.am:
New files added
client/mysqlbinlog.cc:
Functions in rpl_utility.cc is now needed by mysqlbinlog.cc.
libmysqld/Makefile.am:
New files added
mysql-test/extra/rpl_tests/check_type.inc:
Test include file to check a single type conversion.
mysql-test/extra/rpl_tests/rpl_extraSlave_Col.test:
Switching to use INT instead of TEXT for column that should not have matching types.
mysql-test/extra/rpl_tests/rpl_row_basic.test:
Adding code to enable type conversions for BIT tests since InnoDB
cannot handle them properly due to incorrect information stored as
metadata.
mysql-test/extra/rpl_tests/type_conversions.test:
Test file to check a set of type conversions
with current settings of slave_type_conversions.
mysql-test/suite/rpl/t/rpl_typeconv.test:
Test file to test conversions from master to slave with
all possible values for slave_type_conversions.
The test also checks that the slave_type_conversions
variable works as expected.
sql/field.cc:
Changing definition of compatible_field_size to both check if
two field with identical base types are compatible and give an
order between them if they are compatible.
This only implement checking on the slave, so it will not affect
replication from an old master to a new slave.
sql/field.h:
Changing prototypes for functions:
- compatible_field_size()
- init_for_tmp_table()
- row_pack_length()
sql/log_event.cc:
Changing compability checks to build a conversion table if the fields
are compatible, but does not have the same base type.
sql/log_event_old.cc:
Changing compability checks to build a conversion table if the fields
are compatible, but does not have the same base type.
sql/mysql_priv.h:
Adding global option variable for SLAVE_TYPE_CONVERSIONS
sql/mysqld.cc:
Adding SLAVE_TYPE_CONVERSIONS global server variable.
sql/rpl_record.cc:
Changing unpack_row to use the conversion table if present.
sql/rpl_rli.h:
Removing function get_tabledef and replacing it with get_table_data().
This function retrieve data for table opened for replication, not just
table definition.
sql/rpl_utility.cc:
Function table_def::compatible_with is changed to compare table on master
and slave for compatibility and generate a conversions table if they are
compatible.
Computing real type of fields from metadata for ENUM and SET types.
Computing pack_length correctly for ENUM, SET, and BLOB types.
Adding optimization to not check compatibility if no
slave type conversions are enabled.
sql/rpl_utility.h:
Changing prototypes since implementation has changed.
Modifying table_def::type() to return real type instead of stored type.
sql/set_var.cc:
Adding SLAVE_TYPE_CONVERSIONS variable.
sql/set_var.h:
Adding SLAVE_TYPE_CONVERSIONS variable.
sql/share/errmsg.txt:
Adding error messages for slave type conversions.
sql/sql_class.h:
Adding SLAVE_TYPE_CONVERSIONS variable.
sql/sql_select.cc:
Correcting create_virtual_tmp_table() to compute null bit positions
correctly in the presence of bit fields.
In order to handle CHAR() fields, 8 bits were reserved for
the size of the CHAR field. However, instead of denoting the
number of characters in the field, field_length was used which
denotes the number of bytes in the field.
Since UTF-8 fields can have three bytes per character (and
has been extended to have four bytes per character in 6.0),
an extra two bits have been encoded in the field metadata
work for fields of type Field_string (i.e., CHAR fields).
Since the metadata word is filled, the extra bits have been
encoded in the upper 4 bits of the real type (the most
significant byte of the metadata word) by computing the
bitwise xor of the extra two bits. Since the upper 4 bits
of the real type always is 1111 for Field_string, this
means that for fields of length <256, the encoding is
identical to the encoding used in pre-5.1.26 servers, but
for lengths of 256 or more, an unrecognized type is formed,
causing an old slave (that does not handle lengths of 256
or more) to stop.
mysql-test/extra/rpl_tests/rpl_row_basic.test:
Adding test cases for replicating UTF-8 fields of lengths
of 256 or more (bytes).
mysql-test/suite/binlog/r/binlog_base64_flag.result:
Result file change.
mysql-test/suite/binlog/t/binlog_base64_flag.test:
Adding tests to trigger check that an error is generated when replicating from a
5.1.25 server for tables with a CHAR(128) but not when replicating a table with a
CHAR(63). Although the bug indicates that the limit is 83, we elected to use CHAR(63)
since 6.0 uses 4-byte UTF-8, and anything exceeding 63 would then cause the test to fail
when the patch is merged to 6.0.
mysql-test/suite/bugs/combinations:
Adding combinations file to run all bug reports in all binlog modes (where
applicable).
mysql-test/suite/bugs/r/rpl_bug37426.result:
Result file change.
mysql-test/suite/bugs/t/rpl_bug37426.test:
Added test for reported bug.
mysql-test/suite/rpl/r/rpl_row_basic_2myisam.result:
Result file change.
mysql-test/suite/rpl/r/rpl_row_basic_3innodb.result:
Result file change.
sql/field.cc:
Encoding an extra two bits in the most significant nibble (4 bits)
of the metadata word. Adding assertions to ensure that no attempt
is made to use lengths longer than supported.
Extending compatible_field_size() function with an extra parameter
holding a Relay_log_instace for error reporting.
Field_string::compatible_field_size() now reports an error if field
size for a CHAR is >255.
sql/field.h:
Field length is now computed from most significant 4 bits
of metadata word, or is equal to the row pack length if
there is no metadata.
Extending compatible_field_size() function with an extra parameter
holding a Relay_log_instace for error reporting.
sql/rpl_utility.cc:
Adding relay log parameter to compatible_field_size().
Minor refactoring to eliminate duplicate code.
sql/slave.cc:
Extending rpl_master_has_bug() with a single-argument predicate function and
a parameter to the predicate function. The predicate function can be used to
test for extra conditions for the bug before writing an error message.
sql/slave.h:
Extending rpl_master_has_bug() with a single-argument predicate function and
a parameter to the predicate function. The predicate function can be used to
test for extra conditions for the bug before writing an error message.
Also removing gratuitous default argument.
sql/sql_insert.cc:
Changing calls to rpl_master_has_bug() to adapt to changed signature.
BitKeeper/deleted/.del-show_binlog_events2.inc:
Delete: mysql-test/include/show_binlog_events2.inc
client/mysqlbinlog.cc:
char -> uchar for raw memory.
sql/item_cmpfunc.cc:
Adding cast to remove warning when converting negative integer
to unsigned type.
sql/log_event.cc:
char -> uchar for raw memory.
sql/log_event.h:
char -> uchar for raw memory.
sql/rpl_utility.cc:
Adding cast to remove warning when converting negative integer
to unsigned type.
sql/slave.cc:
char -> uchar for raw memory.
sql/sql_repl.cc:
char -> uchar for raw memory.
sql-common/client.c:
char -> uchar for raw memory.
