Merge

update a row or find a row by key (this is VERY unlikely to happen if a

normal check has succeeded!).

Some things reported by check table, can't be corrected automaticly:

@itemize @bullet

@item

@code{Found row where the auto_increment column has the value 0}.

This means that you have in the table a row where the

@code{auto_increment} index column contains the value 0.

(It's possible to create a row where the auto_increment column is 0 by

explicitely setting the column to 0 with an @code{UPDATE} statement)

This isn't an error in itself, but could cause trouble if you decide to

dump the table and restore it or do an @code{ALTER TABLE} on the

table. In this case the auto_increment column will change value,

according to the rules of auto_increment columns, which could cause

problems like a duplicate key error.

To get rid of the warning, just execute an @code{UPDATE} statement

to set the column to some other value than 0.

@end itemize

@findex BACKUP TABLE

@node BACKUP TABLE, RESTORE TABLE, CHECK TABLE, Reference

@section @code{BACKUP TABLE} Syntax

an extension, the extension number of the log file will be incremented

by one relative to the previous file.  If you have used an extension in

the file name, @strong{MySQL} will close and reopen the update log file.

@xref{Update log}.

@xref{Update log}. This is the same thing as sending the @code{SIGHUP}

signal to the @code{mysqld} server.

@item @code{PRIVILEGES} @tab Reloads the privileges from the grant tables in

the @code{mysql} database.

@item @code{TABLES WITH READ LOCK} @tab Closes all open tables and locks all tables for all databases with a read until one executes @code{UNLOCK TABLES}. This is very convenient way to get backups if you have a file system, like Veritas,that can take snapshots in time.

@item @code{STATUS} @tab Resets most status variables to zero.

@item @code{STATUS} @tab Resets most status variables to zero. This is something one should only use when debugging a query.

@end multitable

You can also access each of the commands shown above with the @code{mysqladmin}

utility, using the @code{flush-hosts}, @code{flush-logs}, @code{reload},

or @code{flush-tables} commands.

Take also a look at the @code{RESET} command used with

replication. @xref{Replication SQL}.

@cindex @code{mysqladmin}

@findex KILL

@node KILL, SHOW, FLUSH, Reference

@item @strong{Option} @tab @strong{Description}

@item @code{log-bin=filename} @tab

Write to a binary update log to the specified location. Note that if you

give it a parameter with an extension

(for example, @code{log-bin=/mysql/logs/replication.log} ) versions up to 3.23.24

will not work right during replication if you do @code{FLUSH LOGS} . The

problem is fixed in Version 3.23.25. If you are using this kind of log name,

@code{FLUSH LOGS} will be ignored on binlog. To clear the log, run

give it a parameter with an extension (for example,

@code{log-bin=/mysql/logs/replication.log} ) versions up to 3.23.24 will

not work right during replication if you do @code{FLUSH LOGS} . The

problem is fixed in Version 3.23.25. If you are using this kind of log

name, @code{FLUSH LOGS} will be ignored on binlog. To clear the log, run

@code{FLUSH MASTER}, and do not forget to run @code{FLUSH SLAVE} on all

slaves. In Version 3.23.26 and in later versions you should use @code{RESET MASTER}

and @code{RESET SLAVE}

slaves. In Version 3.23.26 and in later versions you should use

@code{RESET MASTER} and @code{RESET SLAVE}

@item @code{log-bin-index=filename} @tab

Because the user could issue the @code{FLUSH LOGS} command, we need to

@appendixsubsec Changes in release 3.23.40

@itemize @bullet

@item

Fixed that @code{DELETE FROM table_name ... LIMIT 0} and

@code{UPDATE FROM table_name ... LIMIT 0} doesn't delete/update anything.

@item

@code{CHECK TABLE} now checks if an auto_increment column contains the value 0.

@item

Sending a @code{SIGHUP} to @code{mysqld} will now only flush the logs,

not reset the replication.

@item

Fixed parser to allow floats of type @code{1.0e1} (no sign after @code{e}).

@item

Option @code{--force} to @code{myisamchk} now also updates states.

Make it possible to specify @code{long_query_time} with a granularity

in microseconds.

@item

Add a configurable prompt to the @code{mysql} command line client, with

options like database in use, time and date...

@item

Add range checking to @code{MERGE} tables.

@item

Link the @code{myisampack} code into the server.

        AC_MSG_RESULT(yes)

        AC_DEFINE(LIBWRAP)

        AC_DEFINE(HAVE_LIBWRAP)

        WRAPLIBS="-L$with_libwrap/lib -lwrap",

	if test "$with_libwrap" != "yes"; then

	    WRAPLIBS="-L${with_libwrap}/lib"

	fi

	WRAPLIBS="${WRAPLIBS} -lwrap",

        AC_MSG_RESULT(no)

        CPPFLAGS=${_cppflags} LDFLAGS=${_ldflags}),

      CPPFLAGS=${_cppflags} LDFLAGS=${_ldflags})

    echo "Adding fix for interrupted reads"

    CXXFLAGS="$CXXFLAGS -DMYSQLD_NET_RETRY_COUNT=1000000"

    ;;

  *netbsd*)

    echo "Adding flag -Dunix"

    CFLAGS="$CFLAGS -Dunix"

    CXXFLAGS="$CXXFLAGS -Dunix"

    ;;

  *bsdi*)

    echo "Adding fix for BSDI"

    CFLAGS="$CFLAGS -D__BSD__ -DHAVE_BROKEN_REALPATH"

    AC_DEFINE(HAVE_mit_thread)

    MT_INCLUDES="-I\$(top_srcdir)/mit-pthreads/include"

    AC_SUBST(MT_INCLUDES)

    MT_LD_ADD="-L \$(top_srcdir)/mit-pthreads/obj/ -lpthread"

    MT_LD_ADD="\$(top_srcdir)/mit-pthreads/obj/libpthread.a"

    AC_SUBST(MT_LD_ADD)

    LIBS="$MT_LD_ADD $LIBS"

    echo ""

    echo "Configuring MIT Pthreads"

    # We will never install so installation paths are not needed.

    (cd mit-pthreads; sh ./configure)

    echo "End of MIT Pthreads configuration"

    echo ""

    LIBS="$MT_LD_ADD $LIBS"

  fi

fi

AC_SUBST(sql_server_dirs)

static int detzcode(const char * codep)

{

	long result;

	int result;

	int	i;

	result = 0;

#include <sys/signal.h>

__BEGIN_DECLS

#if NSIG <= 32

#define	__SIGEMPTYSET		0

#define	__SIGFILLSET		0xffffffff

#define	__SIGISMEMBER(s, n)	((*(s) & (1 << ((n) - 1))) != 0)

#else	/* XXX Netbsd >= 1.3H */

int	sigaction __P_((int, const struct sigaction *, struct sigaction *)) __RENAME(__sigaction14);

#define	__SIGEMPTYSET		{ 0, 0, 0, 0}

#define	__SIGFILLSET		{ 0xffffffff, 0xffffffff, \

				  0xffffffff, 0xffffffff }

#define	__SIGISMEMBER(s, n)	(((s)->__bits[__SIGWORD(n)] & __SIGMASK(n)) != 0)

#endif

__END_DECLS

#endif /* LIBC_SCCS and not lint */

#include <string.h>

#if defined(__NetBSD__)

#include <errno.h>

#endif

char *

strerror(num)

	int num;

{

#if !defined(__NetBSD__)

	extern int sys_nerr;

	extern char *sys_errlist[];

#endif

#define	UPREFIX	"Unknown error: "

	static char ebuf[40] = UPREFIX;		/* 64-bit number + slop */

	register unsigned int errnum;

	errnum = num;				/* convert to unsigned */

	if (errnum < sys_nerr)

		return(sys_errlist[errnum]);

		return((char *)sys_errlist[errnum]);

	/* Do this by hand, so we don't include stdio(3). */

	t = tmp;