Arjens LOG functions changes with small changes and tests added to mysql-test (684bf18e) · Commits · Software / OSDI20 Artifacts / mariadb

BitKeeper/etc/logging_ok

+1 −0

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		@@ -70,3 +70,4 @@ zak@linux.local
		salle@geopard.(none)
		walrus@mysql.com
		zgreant@mysql.com
		peter@mysql.com

Docs/manual.texi

+60 −5

Original line number	Diff line number	Diff line
		@@ -31874,17 +31874,57 @@ mysql> SELECT EXP(2);
		mysql> SELECT EXP(-2);
		-> 0.135335
		@end example
		@findex LOG()
		@item LOG(X)

		@findex LN()
		@item LN(X)
		Returns the natural logarithm of @code{X}:
		@example
		mysql> SELECT LN(2);
		-> 0.693147
		mysql> SELECT LN(-2);
		-> NULL
		@end example

		This function was added in MySQL version 4.0.3.
		It is synonymous with @code{LOG(X)} in MySQL.

		@findex LOG()
		@item LOG([B,]X)
		When called with one parameter, this function returns the natural logarithm
		of @code{X}:
		@example
		mysql> SELECT LOG(2);
		-> 0.693147
		mysql> SELECT LOG(-2);
		-> NULL
		@end example
		If you want the log of a number @code{X} to some arbitary base @code{B}, use
		the formula @code{LOG(X)/LOG(B)}.

		When called with two parameters, this function returns the logarithm of
		@code{X} for an arbitary base @code{B}:
		@example
		mysql> SELECT LOG(2,65536);
		-> 16.000000
		mysql> SELECT LOG(1,100);
		-> NULL
		@end example

		The arbitrary base option was added in MySQL version 4.0.3.
		@code{LOG(B,X)} is equivalent to @code{LOG(X)/LOG(B)}.

		@findex LOG2()
		@item LOG2(X)
		Returns the base-2 logarithm of @code{X}:
		@example
		mysql> SELECT LOG2(65536);
		-> 16.000000
		mysql> SELECT LOG2(-100);
		-> NULL
		@end example

		@code{LOG2()} is useful for finding out how many bits a number would
		require for storage.
		This function was added in MySQL version 4.0.3.
		In earlier versions, you can use @code{LOG(X)/LOG(2)} instead.

		@findex LOG10()
		@item LOG10(X)
		@@ -49674,12 +49714,27 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.
		@cindex changes, version 4.0

		@menu
		* News-4.0.3:: Changes in release 4.0.3
		* News-4.0.2:: Changes in release 4.0.2 (01 July 2002)
		* News-4.0.1:: Changes in release 4.0.1 (23 Dec 2001)
		* News-4.0.0:: Changes in release 4.0.0 (Oct 2001: Alpha)
		@end menu

		@node News-4.0.2, News-4.0.1, News-4.0.x, News-4.0.x
		@node News-4.0.3, News-4.0.2, News-4.0.x, News-4.0.x
		@appendixsubsec Changes in release 4.0.3

		@itemize @bullet
		@item
		Extended @code{LOG()} function to accept an optional arbitrary base parameter.
		@xref{Mathematical functions}.
		@item
		Added @code{LOG2()} function (useful for finding out how many bits a number would require for storage).
		@item
		Added @code{LN()} natural logarithm function for compatibility with other databases. It is synonymous with @code{LOG(X)}.
		@end itemize


		@node News-4.0.2, News-4.0.1, News-4.0.3, News-4.0.x
		@appendixsubsec Changes in release 4.0.2 (01 July 2002)

		@itemize @bullet

mysql-test/r/func_math.result

+12 −3

Original line number	Diff line number	Diff line
		@@ -16,9 +16,18 @@ round(5.64,1) round(5.64,2) round(5.64,-1) round(5.64,-2)
		select abs(-10), sign(-5), sign(5), sign(0);
		abs(-10) sign(-5) sign(5) sign(0)
		10 -1 1 0
		select log(exp(10)),exp(log(sqrt(10))*2);
		log(exp(10)) exp(log(sqrt(10))*2)
		10.000000 10.000000
		select log(exp(10)),exp(log(sqrt(10))*2),log(-1),log(NULL),log(1,1),log(3,9),log(-1,2),log(NULL,2);
		log(exp(10)) exp(log(sqrt(10))*2) log(-1) log(NULL) log(1,1) log(3,9) log(-1,2) log(NULL,2)
		10.000000 10.000000 NULL NULL NULL 2.000000 NULL NULL
		select ln(exp(10)),exp(ln(sqrt(10))*2),ln(-1),ln(0),ln(NULL);
		ln(exp(10)) exp(ln(sqrt(10))*2) ln(-1) ln(0) ln(NULL)
		10.000000 10.000000 NULL NULL NULL
		select log2(8),log2(15),log2(-2),log2(0),log2(NULL);
		log2(8) log2(15) log2(-2) log2(0) log2(NULL)
		3.000000 3.906891 NULL NULL NULL
		select log10(100),log10(18),log10(-4),log10(0),log10(NULL);
		log10(100) log10(18) log10(-4) log10(0) log10(NULL)
		2.000000 1.255273 NULL NULL NULL
		select pow(10,log10(10)),power(2,4);
		pow(10,log10(10)) power(2,4)
		10.000000 16.000000

mysql-test/t/func_math.test

+4 −1

Original line number	Diff line number	Diff line
		@@ -8,7 +8,10 @@ select truncate(52.64,1),truncate(52.64,2),truncate(52.64,-1),truncate(52.64,-2)
		select round(5.5),round(-5.5);
		select round(5.64,1),round(5.64,2),round(5.64,-1),round(5.64,-2);
		select abs(-10), sign(-5), sign(5), sign(0);
		select log(exp(10)),exp(log(sqrt(10))*2);
		select log(exp(10)),exp(log(sqrt(10))*2),log(-1),log(NULL),log(1,1),log(3,9),log(-1,2),log(NULL,2);
		select ln(exp(10)),exp(ln(sqrt(10))*2),ln(-1),ln(0),ln(NULL);
		select log2(8),log2(15),log2(-2),log2(0),log2(NULL);
		select log10(100),log10(18),log10(-4),log10(0),log10(NULL);
		select pow(10,log10(10)),power(2,4);
		select rand(999999),rand();
		select pi(),sin(pi()/2),cos(pi()/2),abs(tan(pi())),cot(1),asin(1),acos(0),atan(1);

sql/gen_lex_hash.cc

+4 −4

Original line number	Diff line number	Diff line
		@@ -74,13 +74,13 @@ static struct my_option my_long_options[] =
		{"version", 'V', "Output version information and exit",
		0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
		{"rnd1", 'r', "Set 1 part of rnd value for hash generator",
		(gptr) &best_t1, (gptr) &best_t1, 0, GET_ULONG, REQUIRED_ARG, 6657025L,
		(gptr) &best_t1, (gptr) &best_t1, 0, GET_ULONG, REQUIRED_ARG, 5075635L,
		0, 0, 0, 0, 0},
		{"rnd2", 'R', "Set 2 part of rnd value for hash generator",
		(gptr) &best_t2, (gptr) &best_t2, 0, GET_ULONG, REQUIRED_ARG, 6114496L,
		(gptr) &best_t2, (gptr) &best_t2, 0, GET_ULONG, REQUIRED_ARG, 1345933L,
		0, 0, 0, 0, 0},
		{"type", 't', "Set type of char table to generate",
		(gptr) &best_type, (gptr) &best_type, 0, GET_UINT, REQUIRED_ARG, 1, 0, 0,
		(gptr) &best_type, (gptr) &best_type, 0, GET_UINT, REQUIRED_ARG, 4, 0, 0,
		0, 0, 0},
		{ 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
		};
		@@ -479,7 +479,7 @@ int main(int argc,char **argv)

		MY_INIT(argv[0]);

		start_value=1109118L; /* mode=4903 add=3 type: 0 */
		start_value=3807640L; /* mode=6971 add=3 type: 0 */
		if (get_options(argc,(char **) argv))
		exit(1);