Merge narttu:/my/mysql into tik.mysql.com:/home/my/mysql

jani@prima.mysql.com

jani@prima.mysql.fi

monty@donna.mysql.com

monty@tik.mysql.com

monty@work.mysql.com

paul@central.snake.net

sasha@mysql.sashanet.com

@item The default return type of @code{IF} will now depend on both arguments

and not only the first argument.

@item @code{AUTO_INCREMENT} will not work with negative numbers.

@item @code{INNER}, @code{DELAYED}, @code{RIGHT} and @code{WHEN}

are now reserved words.

@item @code{INNER}, @code{DELAYED}, @code{RIGHT}, @code{CASE}, @code{THEN}, @code{WHEN}, @code{ELSE}, @code{END} and @code{WHEN} are now reserved words.

@item @code{FLOAT(X)} is now a true floating-point type and not a value with

a fixed number of decimals.

@item When declaring @code{DECIMAL(length,dec)} the length argument no

@item

@code{SUM()} now returns @code{NULL}, instead of 0, if there is no matching

rows. This is according to ANSI SQL.

@item New restricted words: @code{CASE, THEN, WHEN, ELSE, END, and RIGHT}.

@item An @code{AND} or @code{OR} with @code{NULL} values will now return

@code{NULL} instead of 0. This mostly affects queries that use @code{NOT}

on an @code{AND/OR} expression as @code{NOT NULL} = @code{NULL}.

@code{LPAD()} and @code{RPAD()} will shorten the result string if it's longer

than the length argument.

@end itemize

@cindex compatibility, between MySQL versions

will be the same in each case, because trailing spaces are removed from

@code{CHAR} columns upon retrieval.

Values in @code{CHAR} and @code{VARCHAR} columns are sorted and compared in

case-insensitive fashion, unless the @code{BINARY} attribute was specified

when the table was created.  The @code{BINARY} attribute means that column

values are sorted and compared in case-sensitive fashion according to the

ASCII order of the machine where the @strong{MySQL} server is running.

Values in @code{CHAR} and @code{VARCHAR} columns are sorted and compared

in case-insensitive fashion, unless the @code{BINARY} attribute was

specified when the table was created.  The @code{BINARY} attribute means

that column values are sorted and compared in case-sensitive fashion

according to the ASCII order of the machine where the @strong{MySQL}

server is running. @code{BINARY} doesn't affect how the column is stored

or retrieved.

The @code{BINARY} attribute is sticky.  This means that if a column marked

@code{BINARY} is used in an expression, the whole expression is compared as a

have the same name as a function.  Spaces around arguments are permitted,

though.

You can force @strong{MySQL} to accept spaces after the function name by

starting @code{mysqld} with @code{--ansi} or using the

@code{CLIENT_IGNORE_SPACE} to @code{mysql_connect()}, but in this case all

function names will become reserved words. @xref{ANSI mode}.

@need 2000

For the sake of brevity, examples display the output from the @code{mysql}

program in abbreviated form.  So this:

@findex LPAD()

@item LPAD(str,len,padstr)

Returns the string @code{str}, left-padded with the string

@code{padstr} until @code{str} is @code{len} characters long:

Returns the string @code{str}, left-padded with the string @code{padstr}

until @code{str} is @code{len} characters long. If @code{str} is longer

than @code{len'} then it will be shortened to @code{len} characters.

@example

mysql> select LPAD('hi',4,'??');

@findex RPAD()

@item RPAD(str,len,padstr)

Returns the string @code{str}, right-padded with the string

@code{padstr} until @code{str} is @code{len} characters long.

@code{padstr} until @code{str} is @code{len} characters long.  If

@code{str} is longer than @code{len'} then it will be shortened to

@code{len} characters.

@example

mysql> select RPAD('hi',5,'?');

        -> 'hi???'

@code{KILL}}.  If you don't use the @code{FULL} option, then only

the first 100 characters of each query will be shown.

This command is very useful if you get the 'too many connections' error

message and want to find out what's going on. @strong{MySQL} reserves

one extra connection for a client with the @code{Process_priv} privilege

to ensure that you should always be able to login and check the system

(assuming you are not giving this privilege to all your users).

@cindex privileges, display

@node SHOW GRANTS, SHOW CREATE TABLE, SHOW PROCESSLIST, SHOW

@subsection SHOW GRANTS (Privileges) for a User

scenario would execute before the @code{INSERT} statement.

@item

You can give a specific @code{INSERT}, @code{UPDATE}, or @code{DELETE} statement

lower priority with the @code{LOW_PRIORITY} attribute.

You can give a specific @code{INSERT}, @code{UPDATE}, or @code{DELETE}

statement lower priority with the @code{LOW_PRIORITY} attribute.

@item

Start @code{mysqld} with a low value for @strong{max_write_lock_count} to give

@appendixsubsec Changes in release 3.23.29

@itemize @bullet

@item

Fixed bug in @code{REPLACE} with BDB tables.

@item

@code{LPAD()} and @code{RPAD()} will shorten the result string if it's longer

than the length argument.

@item

Remove not used BDB logs on shutdown.

@item

When creating a table, put @code{PRIMARY} keys first, followed by

If you want to get a core dump on Linux if @code{mysqld} dies with a

SIGSEGV signal, you can start mysqld with the @code{--core-file} option.

This core file can be used to make a backtrace that may help you

find out why @code{mysqld} died:

@example

shell> gdb mysqld core

gdb>   backtrace

gdb>   info local

gdb>   exit

@end example

@xref{Crashing}.

If you are using gdb 4.17.x or above on Linux, you should install a

@file{.gdb} file, with the following information, in your current

    strpos=strend(insert_pat);

    while ((row=mysql_fetch_row(tableRes)))

    {

      ulong *lengths=mysql_fetch_lengths(tableRes);

      if (init)

      {

        if (cFlag)

static void read_user_name(char *name)

{

  char *str=getenv("USER");

  strmov(name,str ? str : "ODBC");	 /* ODBC will send user variable */

  char *str=getenv("USER");		/* ODBC will send user variable */

  strmake(name,str ? str : "ODBC", USERNAME_LENGTH);

}

#endif

		   const char *passwd, const char *db,

		   uint port, const char *unix_socket,uint client_flag)

{

  char		buff[NAME_LEN+100],charset_name_buff[16],*end,*host_info,

		*charset_name;

  char		buff[NAME_LEN+USERNAME_LENGTH+100],charset_name_buff[16];

  char		*end,*host_info,*charset_name;

  my_socket	sock;

  uint32	ip_addr;

  struct	sockaddr_in sock_addr;

hello	'hello'	""hello""	'h'e'l'l'o'	hel"lo	hel'lo

hello	'hello'	""hello""	'h'e'l'l'o'	hel"lo	hel'lo

hello

hellomonty

length('\n\t\r\b\0\_\%\\')

10

concat('monty',' was here ','again')	length('hello')	char(ascii('h'))

monty was here again	5	h

locate('he','hello')	locate('he','hello',2)	locate('lo','hello',2)

1	0	4

instr('hello','he')

1

position('ll' in 'hello')	position('a' in 'hello')

3	0

left('hello',2)	right('hello',2)	substring('hello',2,2)	mid('hello',1,5)

he	lo	el	hello

concat('',left(right(concat('what ',concat('is ','happening')),9),4),'',substring('monty',5,1))

happy

substring_index('www.tcx.se','.',-2)	substring_index('www.tcx.se','.',1)

tcx.se	www

substring_index('www.tcx.se','tcx',1)	substring_index('www.tcx.se','tcx',-1)

www.	.se

substring_index('.tcx.se','.',-2)	substring_index('.tcx.se','.tcx',-1)

tcx.se	.se

concat(':',ltrim('  left  '),':',rtrim('  right  '),':')

:left  :  right:

concat(':',trim(LEADING FROM ' left'),':',trim(TRAILING FROM ' right '),':')

:left: right:

concat(':',trim(' m '),':',trim(BOTH FROM ' y '),':',trim('*' FROM '*s*'),':')

:m:y:s:

concat(':',trim(BOTH 'ab' FROM 'ababmyabab'),':',trim(BOTH '*' FROM '***sql'),':')

:my:sql:

concat(':',trim(LEADING '.*' FROM '.*my'),':',trim(TRAILING '.*' FROM 'sql.*.*'),':')

:my:sql:

insert('txs',2,1,'hi')	insert('is ',4,0,'a')	insert('txxxxt',2,4,'es')

this	is a	test

replace('aaaa','a','b')	replace('aaaa','aa','b')	replace('aaaa','a','bb')	replace('aaaa','','b')	replace('bbbb','a','c')

bbbb	bb	bbbbbbbb	aaaa	bbbb

replace(concat(lcase(concat('THIS',' ','IS',' ','A',' ')),ucase('false'),' ','test'),'FALSE','REAL')

this is a REAL test

soundex('')	soundex('he')	soundex('hello all folks')

	H000	H4142

password('test')	length(encrypt('test'))	encrypt('test','aa')

378b243e220ca493	13	aaqPiZY5xR5l.

md5('hello')

5d41402abc4b2a76b9719d911017c592

repeat('monty',5)	concat('*',space(5),'*')

montymontymontymontymonty	*     *

reverse('abc')	reverse('abcd')

cba	dcba

rpad('a',4,'1')	rpad('a',4,'12')	rpad('abcd',3,'12')

a111	a121	abc

lpad('a',4,'1')	lpad('a',4,'12')	lpad('abcd',3,'12')

111a	121a	abc

rpad(741653838,17,'0')	lpad(741653838,17,'0')

74165383800000000	00000000741653838

rpad('abcd',7,'ab')	lpad('abcd',7,'ab')

abcdaba	abaabcd

rpad('abcd',1,'ab')	lpad('abcd',1,'ab')

a	a

LEAST(NULL,'HARRY','HARRIOT',NULL,'HAROLD')	GREATEST(NULL,'HARRY','HARRIOT',NULL,'HAROLD')

HAROLD	HARRY