Problem:
In cases when a client-side macro appears inside a server-side comment, the add_line() function in mysql.cc discarded all characters until the next delimiter to remove macro arguments from the query string. This resulted in broken queries being sent to the server when the next delimiter character appeared past the comment's boundaries, because the comment closing sequence ('*/') was discarded.
Fix:
If a client-side macro appears inside a server-side comment, discard all characters in the comment after the macro (that is, until the end of the comment rather than the next delimiter).
This is a minimal fix to allow only simple cases used by the mysqlbinlog utility. Limitations that are worth documenting:
- Nested server-side and/or client-side comments are not supported by mysql.cc
- Using client-side macros in multi-line server-side comments is not supported
- All characters after a client-side macro in a server-side comment will be omitted from the query string (and thus, will not be sent to server).
bug #27715: mysqld --character-sets-dir buffer overflow
bug ##26851: Mysql Client --pager Buffer Overflow
Using strmov() to copy an argument may cause overflow
if the argument's length is bigger than the buffer:
use strmake instead.
Also, we have to encrease the error message buffer size to fit
the longest message.
The problem happened because those tests were using "cp932" and "ucs2" without checking whether these character sets are available. This fix moves test parts to make character set specific parts be tested only if they are:
- some parts were moved to "ctype_ucs.test" and "ctype_cp932.test"
- some parts were moved to the newly added tests "innodb-ucs2.test", "mysqlbinglog-cp932.test" and "sp-ucs2.test"
- Removed not used variables and functions
- Added #ifdef around code that is not used
- Renamed variables and functions to avoid conflicts
- Removed some not used arguments
Fixed some class/struct warnings in ndb
Added define IS_LONGDATA() to simplify code in libmysql.c
I did run gcov on the changes and added 'purecov' comments on almost all lines that was not just variable name changes
The column's NOT NULL flag doesn't affect what we should print. Remove the
wrong logic that does check it.
Also, verify that this and the previous two tests print the same data as
other output formats.
The mysql client uses the default character set on reconnect. The default character set is now controled by the client charset command while the client is running. The charset command now also issues a SET NAMES command to the server to make sure that the client's charset settings are in sync with the server's.
Correct a bug (that I introduced, after using Oracle's database software for
too many years) where the length of the database-sent data is incorrectly
used to infer NULLness.
does not have "NOT NULL" attribute set. Also, calculate the padding
characters more safely, so that a negative number doesn't cause it to
print MAXINT-n spaces.
internal charset to one associated with currently being handled query.
To note such a query can come from interactive client either.
There was a discussion within replication team and Monty who's suggestion won.
It avoids straightforward parsing of all `set' queries that could affect client side
character set.
According to the idea, mysql client does not parse `set' queries but rather cares of
`charset new_cs_name' command.
This command is generated by mysqlbinlog in form of exclaiming comment (Lars' suggestion)
so that enlightened clients like `mysql' knows what to do with it.
Interactive human can switch between many multi-byte charsets during the session
providing the command explicitly.
To note that setting new internal mysql's charset does not
trigger sending any `SET' sql statement to the server.
Ensure that ccache is also used for C programs
mysql: Ensure that 'delimiter' works the same way in batch mode as in normal mode
mysqldump: Change to use ;; (instead of //) as a stored procedure/trigger delimiter
Fixed test cases by adding missing DROP's and rename views to be of type 'v#'
Removed MY_UNIX_PATH from fn_format()
Removed current_db_used from TABLE_LIST
Removed usage of 'current_thd' in Item_splocal
Removed some compiler warnings
A bit faster longlong2str code
