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https://dev.mysql.com/doc/internals/en/error-injection.html
So you cannot copy and modify an example, but have to learn it the hard way. Note: The ERROR_INJECT framework has been removed in an early 6.0 version. The error injection method is based on the DBUG framework just like the Dbug Sleep method. In ...
https://dev.mysql.com/doc/internals/en/error-message-adding.html
That is, the files have names like czech/errmsg.txt, danish/errmsg.txt, and so forth, and each one is language-specific. The procedure for adding error messages depends on which version of MySQL you are using: Before MySQL 5.0.3, error messages are ...
https://dev.mysql.com/doc/internals/en/error-messages-5-0-3-higher.html
The file you edit to add a new error message depends on your version of MySQL: MySQL 5.0.3 up to 5.5: Edit errmsg.txt MySQL 5.5 and up: Edit errmsg-utf8.txt In either case, comp_err generates the header files automatically during the MySQL build ...
https://dev.mysql.com/doc/internals/en/error-messages-storage-engine.html
When you have returned the error message it will be passed to MySQL and formatted as Got error %d '%-.100s' from %s. To add error messages for table handlers, the following example may be helpful. Purpose: Implement the handler::get_error_message ...
https://dev.mysql.com/doc/internals/en/event-class-archaeological-notes.html
The start events for both v1 and v3 therefore have a type code of 1, although the event structures differ and must be distinguished by examining their contents. Despite the "V3" in the type code name, START_EVENT_V3 currently is used as the type ...
https://dev.mysql.com/doc/internals/en/event-header-fields.html
Suppose that M1, M2, and M3 have server ID values of 1, 2, and 3, and that they are replicating in circular fashion: M1 is the master for M2, M2 is the master for M3, and M3 is that master for M1. The value of this constant is 13 in MySQL 3.23 (v1 ...
https://dev.mysql.com/doc/internals/en/example-several-mysql-packets.html
Executing SELECT repeat("a", 50) results in uncompressed ProtocolText::Resultset like: 01 00 00 01 01 25 00 00 02 03 64 65 66 00 00 00 .....%....def... 0f 72 65 70 65 61 74 28 22 61 22 2c 20 35 30 29 .repeat("a", 50) 00 0c 08 00 32 00 00 00 fd 01 ...
https://dev.mysql.com/doc/internals/en/extra-directory.html
These programs are all standalone utilities, that is, they have a main() function and their main role is to show information that the MySQL server needs or produces. They are as follows: comp_err.c --- makes error-message files from a multi-language ...
https://dev.mysql.com/doc/internals/en/guided-tour-majordir-client.html
You'll notice, by the way, that we're concentrating on the files that have extension of ".c" or ".cc". There are other utilities too in fact, you'll find the source of most client-side programs here. There are also programs for checking the ...
https://dev.mysql.com/doc/internals/en/guided-tour-majordir-mysys.html
The .c files in mysys have procedures and functions that are handy for calling by main programs, for example by the programs in the myisam directory. The next major directory is labelled mysys, which stands for MySQL System Library. This is the ...