| Commit message (Collapse) | Author | Age | Files | Lines |
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Problem:-
using last_insert_id() on an auto_incremented bigint unsigned does
not work for values which are greater than max-bigint-signed.
Analysis:-
last_insert_id() returns the first auto_incremented value for a column
and an auto_incremented value can have only positive values.
In our code, when we are initializing a last_insert_id object, we are
taking it as a signed BIGINT, So when the auto_incremented value reaches
greater than max signed bigint, last_insert_id gives negative result.
Solution:
When we are fetching the value from last_insert_id, We are setting the
unsigned_flag, so that it take only unsigned BIGINT value.
sql/item_func.cc:
here unsigned value is converted to signed value.
sql/item_func.h:
last_insert_id() gives an auto_incremented value which can be
positive only,so defined it as a unsigned longlong sets the
unsigned_flag to 1.
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Problem:-
using last_insert_id() on an auto_incremented bigint unsigned does
not work for values which are greater than max-bigint-signed.
Analysis:-
last_insert_id() returns the first auto_incremented value for a column
and an auto_incremented value can have only positive values.
In our code, when we are initializing a last_insert_id object, we are
taking it as a signed BIGINT, So when the auto_incremented value reaches
greater than max signed bigint, last_insert_id gives negative result.
Solution:
When we are fetching the value from last_insert_id, We are setting the
unsigned_flag, so that it take only unsigned BIGINT value.
sql/item_func.cc:
here unsigned value is converted to signed value.
sql/item_func.h:
last_insert_id() gives an auto_incremented value which can be
positive only,so defined it as a unsigned longlong sets the
unsigned_flag to 1.
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my_double_round(DBL_MAX, -12, ....)
should return 'inf' rather than DBL_MAX
The problem is that floor(value/tmp) * tmp
is inlined, and optimized away.
The solution seems to be to prevent inlining by pre-computing value/tmp and
storing it in a variable.
No new test case: main.type_float fails without this patch.
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SENSE
Truncate result of decimal division before converting to integer.
mysql-test/r/func_math.result:
New test case.
mysql-test/t/func_math.test:
New test case.
sql/item_func.cc:
Item_func_int_div::val_int():
Truncate result of decimal division before converting to integer.
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GCC 4.6 has new -Wunused-but-set-variable flag, which is enabled
by -Wall, that causes GCC to emit a warning whenever a local variable
is assigned to, but otherwise unused (aside from its declaration).
Since the maintainer mode uses -Wall and -Werror, source code which
triggers these warnings will be rejected. That is, these warnings
become hard errors.
The solution is to fix the code which triggers these specific warnings.
In most of the cases, this is a welcome cleanup as code which triggers
this warning is probably dead anyway.
dbug/dbug.c:
Unused but set.
libmysqld/lib_sql.cc:
Length is not necessary as the converted error message is always
null-terminated.
sql/item_func.cc:
Make get_var_with_binlog private to this compilation unit.
If a error was raised, do not attempt to evaluate the user
variable as the statement execution will be interrupted
anyway.
sql/mysqld.cc:
Use a void expression to silence the warning. Avoids the use of
macros that would make the code more unreadable than it already is.
sql/protocol.cc:
Length is not necessary as the converted error message is always
null-terminated. Remove unnecessary casts and assignment.
sql/sql_class.h:
Function is only used in a single compilation unit.
sql/sql_load.cc:
Only use the variable outside of EMBEDDED_LIBRARY.
storage/innobase/btr/btr0cur.c:
Do not retrieve field, only the record length is being used.
storage/perfschema/pfs.cc:
Use a void expression to silence the warning.
tests/mysql_client_test.c:
Unused but set.
unittest/mysys/lf-t.c:
Unused but set.
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Assertion happens due to missing NULL value check in
Item_func_round::fix_length_and_dec() function.
The fix: added NULL value check for second parameter.
mysql-test/r/func_math.result:
test case
mysql-test/t/func_math.test:
test case
sql/item_func.cc:
added NULL value check for second parameter.
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In sql_class.cc, 'row_count', of type 'ha_rows', was used as last argument for
ER_TRUNCATED_WRONG_VALUE_FOR_FIELD which is
"Incorrect %-.32s value: '%-.128s' for column '%.192s' at row %ld".
So 'ha_rows' was used as 'long'.
On SPARC32 Solaris builds, 'long' is 4 bytes and 'ha_rows' is 'longlong' i.e. 8 bytes.
So the printf-like code was reading only the first 4 bytes.
Because the CPU is big-endian, 1LL is 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x01
so the first four bytes yield 0. So the warning message had "row 0" instead of
"row 1" in test outfile_loaddata.test:
-Warning 1366 Incorrect string value: '\xE1\xE2\xF7' for column 'b' at row 1
+Warning 1366 Incorrect string value: '\xE1\xE2\xF7' for column 'b' at row 0
All error-messaging functions which internally invoke some printf-life function
are potential candidate for such mistakes.
One apparently easy way to catch such mistakes is to use
ATTRIBUTE_FORMAT (from my_attribute.h).
But this works only when call site has both:
a) the format as a string literal
b) the types of arguments.
So:
func(ER(ER_BLAH), 10);
will silently not be checked, because ER(ER_BLAH) is not known at
compile time (it is known at run-time, and depends on the chosen
language).
And
func("%s", a va_list argument);
has the same problem, as the *real* type of arguments is not
known at this site at compile time (it's known in some caller).
Moreover,
func(ER(ER_BLAH));
though possibly correct (if ER(ER_BLAH) has no '%' markers), will not
compile (gcc says "error: format not a string literal and no format
arguments").
Consequences:
1) ATTRIBUTE_FORMAT is here added only to functions which in practice
take "string literal" formats: "my_error_reporter" and "print_admin_msg".
2) it cannot be added to the other functions: my_error(),
push_warning_printf(), Table_check_intact::report_error(),
general_log_print().
To do a one-time check of functions listed in (2), the following
"static code analysis" has been done:
1) replace
my_error(ER_xxx, arguments for substitution in format)
with the equivalent
my_printf_error(ER_xxx,ER(ER_xxx), arguments for substitution in
format),
so that we have ER(ER_xxx) and the arguments *in the same call site*
2) add ATTRIBUTE_FORMAT to push_warning_printf(),
Table_check_intact::report_error(), general_log_print()
3) replace ER(xxx) with the hard-coded English text found in
errmsg.txt (like: ER(ER_UNKNOWN_ERROR) is replaced with
"Unknown error"), so that a call site has the format as string literal
4) this way, ATTRIBUTE_FORMAT can effectively do its job
5) compile, fix errors detected by ATTRIBUTE_FORMAT
6) revert steps 1-2-3.
The present patch has no compiler error when submitted again to the
static code analysis above.
It cannot catch all problems though: see Field::set_warning(), in
which a call to push_warning_printf() has a variable error
(thus, not replacable by a string literal); I checked set_warning() calls
by hand though.
See also WL 5883 for one proposal to avoid such bugs from appearing
again in the future.
The issues fixed in the patch are:
a) mismatch in types (like 'int' passed to '%ld')
b) more arguments passed than specified in the format.
This patch resolves mismatches by changing the type/number of arguments,
not by changing error messages of sql/share/errmsg.txt. The latter would be wrong,
per the following old rule: errmsg.txt must be as stable as possible; no insertions
or deletions of messages, no changes of type or number of printf-like format specifiers,
are allowed, as long as the change impacts a message already released in a GA version.
If this rule is not followed:
- Connectors, which use error message numbers, will be confused (by insertions/deletions
of messages)
- using errmsg.sys of MySQL 5.1.n with mysqld of MySQL 5.1.(n+1)
could produce wrong messages or crash; such usage can easily happen if
installing 5.1.(n+1) while /etc/my.cnf still has --language=/path/to/5.1.n/xxx;
or if copying mysqld from 5.1.(n+1) into a 5.1.n installation.
When fixing b), I have verified that the superfluous arguments were not used in the format
in the first 5.1 GA (5.1.30 'bteam@astra04-20081114162938-z8mctjp6st27uobm').
Had they been used, then passing them today, even if the message doesn't use them
anymore, would have been necessary, as explained above.
include/my_getopt.h:
this function pointer is used only with "string literal" formats, so we can add
ATTRIBUTE_FORMAT.
mysql-test/collections/default.experimental:
test should pass now
sql/derror.cc:
by having a format as string literal, ATTRIBUTE_FORMAT check becomes effective.
sql/events.cc:
Change justified by the following excerpt from sql/share/errmsg.txt:
ER_EVENT_SAME_NAME
eng "Same old and new event name"
ER_EVENT_SET_VAR_ERROR
eng "Error during starting/stopping of the scheduler. Error code %u"
sql/field.cc:
ER_TOO_BIG_SCALE 42000 S1009
eng "Too big scale %d specified for column '%-.192s'. Maximum is %lu."
ER_TOO_BIG_PRECISION 42000 S1009
eng "Too big precision %d specified for column '%-.192s'. Maximum is %lu."
ER_TOO_BIG_DISPLAYWIDTH 42000 S1009
eng "Display width out of range for column '%-.192s' (max = %lu)"
sql/ha_ndbcluster.cc:
ER_OUTOFMEMORY HY001 S1001
eng "Out of memory; restart server and try again (needed %d bytes)"
(sizeof() returns size_t)
sql/ha_ndbcluster_binlog.cc:
Too many arguments for:
ER_GET_ERRMSG
eng "Got error %d '%-.100s' from %s"
Patch by Jonas Oreland.
sql/ha_partition.cc:
print_admin_msg() is used only with a literal as format, so ATTRIBUTE_FORMAT
works.
sql/handler.cc:
ER_OUTOFMEMORY HY001 S1001
eng "Out of memory; restart server and try again (needed %d bytes)"
(sizeof() returns size_t)
sql/item_create.cc:
ER_TOO_BIG_SCALE 42000 S1009
eng "Too big scale %d specified for column '%-.192s'. Maximum is %lu."
ER_TOO_BIG_PRECISION 42000 S1009
eng "Too big precision %d specified for column '%-.192s'. Maximum is %lu."
'c_len' and 'c_dec' are char*, passed as %d !! We don't know their value
(as strtoul() failed), but they are likely big, so we use INT_MAX.
'len' is ulong.
sql/item_func.cc:
ER_WARN_DATA_OUT_OF_RANGE 22003
eng "Out of range value for column '%s' at row %ld"
ER_CANT_FIND_UDF
eng "Can't load function '%-.192s'"
sql/item_strfunc.cc:
ER_TOO_BIG_FOR_UNCOMPRESS
eng "Uncompressed data size too large; the maximum size is %d (probably, length of uncompressed data was corrupted)"
max_allowed_packet is ulong.
sql/mysql_priv.h:
sql_print_message_func is a function _pointer_.
sql/sp_head.cc:
ER_SP_RECURSION_LIMIT
eng "Recursive limit %d (as set by the max_sp_recursion_depth variable) was exceeded for routine %.192s"
max_sp_recursion_depth is ulong
sql/sql_acl.cc:
ER_PASSWORD_NO_MATCH 42000
eng "Can't find any matching row in the user table"
ER_CANT_CREATE_USER_WITH_GRANT 42000
eng "You are not allowed to create a user with GRANT"
sql/sql_base.cc:
ER_NOT_KEYFILE
eng "Incorrect key file for table '%-.200s'; try to repair it"
ER_TOO_MANY_TABLES
eng "Too many tables; MySQL can only use %d tables in a join"
MAX_TABLES is size_t.
sql/sql_binlog.cc:
ER_UNKNOWN_ERROR
eng "Unknown error"
sql/sql_class.cc:
ER_TRUNCATED_WRONG_VALUE_FOR_FIELD
eng "Incorrect %-.32s value: '%-.128s' for column '%.192s' at row %ld"
WARN_DATA_TRUNCATED 01000
eng "Data truncated for column '%s' at row %ld"
sql/sql_connect.cc:
ER_HANDSHAKE_ERROR 08S01
eng "Bad handshake"
ER_BAD_HOST_ERROR 08S01
eng "Can't get hostname for your address"
sql/sql_insert.cc:
ER_WRONG_VALUE_COUNT_ON_ROW 21S01
eng "Column count doesn't match value count at row %ld"
sql/sql_parse.cc:
ER_WARN_HOSTNAME_WONT_WORK
eng "MySQL is started in --skip-name-resolve mode; you must restart it without this switch for this grant to work"
ER_TOO_HIGH_LEVEL_OF_NESTING_FOR_SELECT
eng "Too high level of nesting for select"
ER_UNKNOWN_ERROR
eng "Unknown error"
sql/sql_partition.cc:
ER_OUTOFMEMORY HY001 S1001
eng "Out of memory; restart server and try again (needed %d bytes)"
sql/sql_plugin.cc:
ER_OUTOFMEMORY HY001 S1001
eng "Out of memory; restart server and try again (needed %d bytes)"
sql/sql_prepare.cc:
ER_OUTOFMEMORY HY001 S1001
eng "Out of memory; restart server and try again (needed %d bytes)"
ER_UNKNOWN_STMT_HANDLER
eng "Unknown prepared statement handler (%.*s) given to %s"
length value (for '%.*s') must be 'int', per the doc of printf()
and the code of my_vsnprintf().
sql/sql_show.cc:
ER_OUTOFMEMORY HY001 S1001
eng "Out of memory; restart server and try again (needed %d bytes)"
sql/sql_table.cc:
ER_TOO_BIG_FIELDLENGTH 42000 S1009
eng "Column length too big for column '%-.192s' (max = %lu); use BLOB or TEXT instead"
sql/table.cc:
ER_NOT_FORM_FILE
eng "Incorrect information in file: '%-.200s'"
ER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE
eng "Column count of mysql.%s is wrong. Expected %d, found %d. Created with MySQL %d, now running %d. Please use mysql_upgrade to fix this error."
table->s->mysql_version is ulong.
sql/unireg.cc:
ER_TOO_LONG_TABLE_COMMENT
eng "Comment for table '%-.64s' is too long (max = %lu)"
ER_TOO_LONG_FIELD_COMMENT
eng "Comment for field '%-.64s' is too long (max = %lu)"
ER_TOO_BIG_ROWSIZE 42000
eng "Row size too large. The maximum row size for the used table type, not counting BLOBs, is %ld. You have to change some columns to TEXT or BLOBs"
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(SUBSTRING inside a stored function works too slow).
Background:
- THD classes derives from Query_arena, thus inherits the 'state'
attribute and related operations (is_stmt_prepare() & co).
- Although these operations are available in THD, they must not
be used. THD has its own attribute to point to the active
Query_arena -- stmt_arena.
- So, instead of using thd->is_stmt_prepare(),
thd->stmt_arena->is_stmt_prepare() must be used. This was the root
cause of Bug 60025.
This patch enforces the proper way of calling those operations.
is_stmt_prepare() & co are declared as private operations
in THD (thus, they are hidden from being called on THD instance).
The patch tries to minimize changes in 5.5.
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DECIMAL COLUMN FUNCTION
Bug#11764671 57533: UNINITIALISED VALUES IN COPY_AND_CONVERT (SQL_STRING.CC) WITH CERTAIN CHA
When ROUND evaluates decimal result it uses Item::decimal
value as fraction value for the result. In some cases
Item::decimal is greater than real result fraction value
and uninitialised memory of result(decimal) buffer can be
used in further calculations. Issue is introduced by
Bug33143 fix. The fix is to remove erroneous assignment.
mysql-test/r/func_math.result:
test case
mysql-test/t/func_math.test:
test case
sql/item_func.cc:
remove erroneous assignment
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Problem: comparison of a DATETIME sp variable and NOW()
led to Illegal mix of collations error when
character_set_connection=utf8.
Introduced by "WL#2649 Number-to-string conversions".
Error happened in Arg_comparator::set_compare_func(),
because the first argument was errouneously converted to utf8,
while the second argument was not.
Fix: separate agg_arg_charsets_for_comparison() into two functions:
- agg_arg_charsets_for_comparison() - for pure comparison,
when we don't need to return any string result and therefore
don't need to convert arguments to @@character_set_connection:
SELECT a = b;
- agg_arg_charsets_for_string_results_with_comparison() - when
we need to return a string result, but we also need to do
comparison internally: SELECT REPLACE(a,b,c)
If all arguments are numbers:
SELECT REPLACE(123,2,3) -> 133
we convert arguments to @@character_set_connection.
@ mysql-test/include/ctype_numconv.inc
@ mysql-test/r/ctype_binary.result
@ mysql-test/r/ctype_cp1251.result
@ mysql-test/r/ctype_latin1.result
@ mysql-test/r/ctype_ucs.result
@ mysql-test/r/ctype_utf8.result
Adding tests
@ sql/item.cc
@ sql/item.h
@ sql/item_func.cc
@ sql/item_func.h
@ sql/item_strfunc.cc
Introducing and using new function
agg_item_charsets_for_string_result_with_comparison() and
its Item_func wrapper agg_arg_charsets_for_string_result_with_comparison().
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LONGLONG2DECIMAL
Valgrind warning happens due to missing NULL value check in
Item_func::val_decimal. The fix is to add this check.
mysql-test/r/func_time.result:
test case
mysql-test/t/func_time.test:
test case
sql/item_func.cc:
added check for NULL value
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> 0 && SCALE <= PR
Assert fails due to overflow which happens in
Item_func_int_val::fix_num_length_and_dec() as
geometry functions have max_length value equal to
max_field_size(4294967295U). The fix is to skip
max_length calculation for some boundary cases.
mysql-test/r/func_math.result:
test case
mysql-test/t/func_math.test:
test case
sql/item_func.cc:
skip max_length calculation
if argument max_length is near max_field_size.
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0 && SCALE <= PRE
Assertion happens due to missing initialization of unsigned_flag
for Item_func_set_user_var object. It leads to incorrect
calculation of decimal field size.
The fix is to add initialization of unsigned_flag.
mysql-test/r/variables.result:
test case
mysql-test/t/variables.test:
test case
sql/item_func.cc:
add initialization of unsigned_flag.
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from 5.1 to 5.5
(Former 59405)
In this bug, args[0] in an Item_func_find_in_set stored an
Item_func_weekday that was constant. In
Item_func_find_in_set::fix_length_and_dec(), args[0]->val_str()
was called. Later, when Item_func_find_in_set::val_int() was
called, args[0]->null_value was checked. However, the
Item_func_weekday in args[0] had now been replaced with an
Item_cache. No val_*() calls had been made to this Item_cache,
thus null_value was incorrectly 'true', resulting in missing
rows in the result set.
enum_value gets a value in fix_length_and_dec() iff args[0]
is both constant and non-null. It is therefore unnecessary
to check the null_value of args[0] in val_int().
An alternative fix would be to call args[0]->val_int() inside
Item_func_find_in_set::val_int(). This would ensure
args[0]->null_value was set correctly (always false in this case),
but that would have to be done for every record this const value
is checked against.
mysql-test/r/func_set.result:
Add test for BUG#59405
mysql-test/t/func_set.test:
Add test for BUG#59405
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0' FAILED
Problem: wrong character set pointer was passed to my_strtoll10_mb2,
which led to DBUG_ASSERT failure in some cases.
@ mysql-test/r/func_encrypt_ucs2.result
@ mysql-test/t/func_encrypt_ucs2.test
@ mysql-test/r/ctype_ucs.result
@ mysql-test/t/ctype_ucs.test
Adding tests
@ sql/item_func.cc
"cs" initialization was wrong (res does not necessarily point to &str_value)
@ sql/item_strfunc.cc
Item_func_dec_encrypt::val_str() and Item_func_des_descrypt::val_str()
did not set character set for tmp_value (the returned value),
so the old value, which was previously copied from args[1]->val_str(),
was incorrectly returned with tmp_value.
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assignments and comparison in query
A query that compares assignments of the same
user variable caused Valgrind warnings: access
to freed memory region.
In case of a DECIMAL argument the assignment
operator (:=) may return a pointer to a stored
value instead of its copy when evaluated.
The next assignment to the same variable may:
a) overwrite the stored value with a new one
and return the same pointer or even
b) reallocate stored value.
Thus, if we evaluate an assignment and keep
the result pointer and then evaluate another
assignment to the same variable, then the
kept result pointer of the first assignment
will point to unexpectedly changed data or
it may be a dead pointer.
That may cause wrong data or crash.
The user_var_entry::val_decimal method has
been modified to copy user variable data.
mysql-test/r/user_var.result:
Test case for bug #57187.
mysql-test/t/user_var.test:
Test case for bug #57187.
sql/item_func.cc:
Bug #57187: more user variable fun with multiple
assignments and comparison in query
The user_var_entry::val_decimal method has
been modified to copy user variable data.
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mysql-test/r/func_math.result:
New test case.
mysql-test/t/func_math.test:
New test case.
sql/item_func.cc:
Check for null before converting value to my_decimal.
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Fix: copy my_decimal by value, to avoid dangling pointers.
mysql-test/r/func_math.result:
New test case.
mysql-test/t/func_math.test:
New test case.
sql/item_cmpfunc.cc:
No need to call fix_buffer_pointer() anymore.
sql/item_func.cc:
Copy my_decimal by value, to avoid dangling pointers.
sql/my_decimal.h:
Implement proper copy constructor and assignment operator for my_decimal.
sql/sql_analyse.cc:
No need to call fix_buffer_pointer() anymore.
strings/decimal.c:
Remove #line directive: it messes up TAGS and it confuses gdb when debugging.
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- Removed files specific to compiling on OS/2
- Removed files specific to SCO Unix packaging
- Removed "libmysqld/copyright", text is included in documentation
- Removed LaTeX headers for NDB Doxygen documentation
- Removed obsolete NDB files
- Removed "mkisofs" binaries
- Removed the "cvs2cl.pl" script
- Changed a few GPL texts to use "program" instead of "library"
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