File_query_log Class Reference

Private Member Functions
	File_query_log (enum_log_table_type log_type)
	~File_query_log ()
bool	is_open () const
bool	open ()
	Open a (new) log file. More...
void	close ()
	Close the log file. More...
bool	set_file (const char *new_name)
	Change what file we log to. More...
void	check_and_print_write_error ()
	Check if we have already printed ER_ERROR_ON_WRITE and if not, do so. More...
bool	write_general (ulonglong event_utime, my_thread_id thread_id, const char *command_type, size_t command_type_len, const char *sql_text, size_t sql_text_len)
	Write a command to traditional general log file. More...
bool	write_slow (THD *thd, ulonglong current_utime, ulonglong query_start_utime, const char *user_host, size_t user_host_len, ulonglong query_utime, ulonglong lock_utime, bool is_command, const char *sql_text, size_t sql_text_len)
	Log a query to the traditional slow log file. More...

Private Attributes
const enum_log_table_type	m_log_type
	Type of log file. More...
mysql_mutex_t	LOCK_log
	Makes sure we only have one write at a time. More...
char *	name
	Log filename. More...
char	log_file_name [FN_REFLEN]
	Path to log file. More...
char	db [NAME_LEN+1]
	Last seen current database. More...
bool	write_error
	Have we already printed ER_ERROR_ON_WRITE? More...
IO_CACHE	log_file
volatile bool	log_open
	True if the file log is open, false otherwise. More...
PSI_file_key	m_log_file_key
	Instrumentation key to use for file io in log_file. More...

Friends
class	Log_to_file_event_handler
class	Query_logger

Constructor & Destructor Documentation

File_query_log()

File_query_log::File_query_log ( enum_log_table_type  log_type )

private

~File_query_log()

File_query_log::~File_query_log ( )

inlineprivate

Member Function Documentation

check_and_print_write_error()

void File_query_log::check_and_print_write_error ( )

private

Check if we have already printed ER_ERROR_ON_WRITE and if not, do so.

close()

void File_query_log::close ( void  )

private

Close the log file.

Note

One can do an open on the object at once after doing a close. The internal structures are not freed until the destructor is called.

is_open()

bool File_query_log::is_open ( ) const

inlineprivate

Returns

true if the file log is open, false otherwise.

open()

bool File_query_log::open ( )

private

Open a (new) log file.

Open the logfile, init IO_CACHE and write startup messages.

Returns

true if error, false otherwise.

set_file()

bool File_query_log::set_file ( const char *  new_name )

private

Change what file we log to.

write_general()

bool File_query_log::write_general ( ulonglong  event_utime, my_thread_id  thread_id, const char *  command_type, size_t  command_type_len, const char *  sql_text, size_t  sql_text_len  )

private

Write a command to traditional general log file.

Log given command to normal (not rotatable) log file.

Parameters

event_utime	Command start timestamp in micro seconds
thread_id	Id of the thread that issued the query
command_type	The type of the command being logged
command_type_len	The length of the string above
sql_text	The very text of the query being executed
sql_text_len	The length of sql_text string

Returns

true if error, false otherwise.

write_slow()

bool File_query_log::write_slow ( THD *  thd, ulonglong  current_utime, ulonglong  query_start_utime, const char *  user_host, size_t  user_host_len, ulonglong  query_utime, ulonglong  lock_utime, bool  is_command, const char *  sql_text, size_t  sql_text_len  )

private

Log a query to the traditional slow log file.

Parameters

thd	THD of the query
current_utime	Current timestamp in microseconds
query_start_utime	Command start timestamp in microseconds
user_host	The pointer to the string with user@host info
user_host_len	Length of the user_host string
query_utime	Number of microseconds query execution took
lock_utime	Number of microseconds the query was locked
is_command	The flag which determines whether the sql_text is a query or an administrator command
sql_text	The query or administrator in textual form
sql_text_len	The length of sql_text string

Returns

true if error, false otherwise.

Friends And Related Function Documentation

Log_to_file_event_handler

friend class Log_to_file_event_handler

friend

Query_logger

friend class Query_logger

friend

Member Data Documentation

db

char File_query_log::db[NAME_LEN+1]

private

Last seen current database.

LOCK_log

mysql_mutex_t File_query_log::LOCK_log

private

Makes sure we only have one write at a time.

log_file

IO_CACHE File_query_log::log_file

private

log_file_name

char File_query_log::log_file_name[FN_REFLEN]

private

Path to log file.

log_open

volatile bool File_query_log::log_open

private

True if the file log is open, false otherwise.

m_log_file_key

PSI_file_key File_query_log::m_log_file_key

private

Instrumentation key to use for file io in log_file.

m_log_type

const enum_log_table_type File_query_log::m_log_type

private

Type of log file.

name

char* File_query_log::name

private

Log filename.

write_error

bool File_query_log::write_error

private

Have we already printed ER_ERROR_ON_WRITE?

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The documentation for this class was generated from the following file:

• sql/log.cc