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Commit 30ac4901 authored by Alexey Kopytov's avatar Alexey Kopytov
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Fix for bug #21205: Different number of digits for float/double/real in --ps-protocol 

Various parts of code used different 'precision' arguments for sprintf("%g") when converting
floating point numbers to a string. This led to differences in results in some cases 
depending on whether the text-based or prepared statements protocol is used for a query.

Fixed by changing arguments to sprintf("%g") to always be 15 (DBL_DIG) so that results are
consistent regardless of the protocol.

This patch will be null-merged to 6.0 as the problem does not exists there (fixed by the
patch for WL#2934).
parent 2048bd71
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Showing with 58 additions and 45 deletions
client/sql_string.cc
View file @ 30ac4901
......@@ -125,7 +125,7 @@ bool String::set(double num,uint decimals, CHARSET_INFO *cs)
str_charset=cs;
if (decimals >= NOT_FIXED_DEC)
{
uint32 len= my_sprintf(buff,(buff, "%.14g",num));// Enough for a DATETIME
uint32 len= my_sprintf(buff,(buff, "%.15g",num));// Enough for a DATETIME
return copy(buff, len, &my_charset_latin1, cs, &dummy_errors);
}
#ifdef HAVE_FCONVERT
......@@ -677,7 +677,7 @@ void String::qs_append(const char *str, uint32 len)
void String::qs_append(double d)
{
char *buff = Ptr + str_length;
str_length+= my_sprintf(buff, (buff, "%.14g", d));
str_length+= my_sprintf(buff, (buff, "%.15g", d));
}
void String::qs_append(double *d)
......
libmysql/libmysql.c
View file @ 30ac4901
......@@ -3786,13 +3786,13 @@ static void fetch_float_with_conversion(MYSQL_BIND *param, MYSQL_FIELD *field,
#undef NOT_FIXED_DEC
{
/*
The 14 below is to ensure that the server and client has the same
DBL_DIG below is to ensure that the server and client has the same
precisions. This will ensure that on the same machine you get the
same value as a string independent of the protocol you use.
*/
sprintf(buff, "%-*.*g", (int) min(sizeof(buff)-1,
param->buffer_length),
min(14,width), value);
min(DBL_DIG, width), value);
end= strcend(buff, ' ');
*end= 0;
}
......
mysql-test/r/archive_gis.result
View file @ 30ac4901
......@@ -291,7 +291,7 @@ Note 1003 select astext(startpoint(`test`.`gis_line`.`g`)) AS `AsText(StartPoint
SELECT fid, AsText(Centroid(g)) FROM gis_polygon ORDER by fid;
fid AsText(Centroid(g))
108 POINT(15 15)
109 POINT(25.416666666667 25.416666666667)
109 POINT(25.4166666666667 25.4166666666667)
110 POINT(20 10)
SELECT fid, Area(g) FROM gis_polygon ORDER by fid;
fid Area(g)
......@@ -325,8 +325,8 @@ fid IsClosed(g)
116 0
SELECT fid, AsText(Centroid(g)) FROM gis_multi_polygon ORDER by fid;
fid AsText(Centroid(g))
117 POINT(55.588527753042 17.426536064114)
118 POINT(55.588527753042 17.426536064114)
117 POINT(55.5885277530424 17.426536064114)
118 POINT(55.5885277530424 17.426536064114)
119 POINT(2 2)
SELECT fid, Area(g) FROM gis_multi_polygon ORDER by fid;
fid Area(g)
......
mysql-test/r/func_group.result
View file @ 30ac4901
......@@ -61,7 +61,7 @@ grp sum
NULL NULL
1 7
2 20.25
3 45.483163247594
3 45.4831632475944
create table t2 (grp int, a bigint unsigned, c char(10));
insert into t2 select grp,max(a)+max(grp),max(c) from t1 group by grp;
replace into t2 select grp, a, c from t1 limit 2,1;
......@@ -1195,7 +1195,7 @@ std(s1/s2)
0.21325764
select std(o1/o2) from bug22555;
std(o1/o2)
0.21325763586649
0.213257635866493
select std(e1/e2) from bug22555;
std(e1/e2)
0.21325764
......@@ -1221,7 +1221,7 @@ round(std(s1/s2), 17)
0.21325763586649341
select std(o1/o2) from bug22555;
std(o1/o2)
0.21325763586649
0.213257635866493
select round(std(e1/e2), 17) from bug22555;
round(std(e1/e2), 17)
0.21325763586649341
......@@ -1246,7 +1246,7 @@ round(std(s1/s2), 17)
0.21325763586649341
select std(o1/o2) from bug22555;
std(o1/o2)
0.21325763586649
0.213257635866493
select round(std(e1/e2), 17) from bug22555;
round(std(e1/e2), 17)
0.21325763586649341
......
mysql-test/r/func_math.result
View file @ 30ac4901
......@@ -60,7 +60,7 @@ Warnings:
Note 1003 select ln(exp(10)) AS `ln(exp(10))`,exp((ln(sqrt(10)) * 2)) AS `exp(ln(sqrt(10))*2)`,ln(-(1)) AS `ln(-1)`,ln(0) AS `ln(0)`,ln(NULL) AS `ln(NULL)`
select log2(8),log2(15),log2(-2),log2(0),log2(NULL);
log2(8) log2(15) log2(-2) log2(0) log2(NULL)
3 3.9068905956085 NULL NULL NULL
3 3.90689059560852 NULL NULL NULL
explain extended select log2(8),log2(15),log2(-2),log2(0),log2(NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
......@@ -68,7 +68,7 @@ Warnings:
Note 1003 select log2(8) AS `log2(8)`,log2(15) AS `log2(15)`,log2(-(2)) AS `log2(-2)`,log2(0) AS `log2(0)`,log2(NULL) AS `log2(NULL)`
select log10(100),log10(18),log10(-4),log10(0),log10(NULL);
log10(100) log10(18) log10(-4) log10(0) log10(NULL)
2 1.2552725051033 NULL NULL NULL
2 1.25527250510331 NULL NULL NULL
explain extended select log10(100),log10(18),log10(-4),log10(0),log10(NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
......@@ -85,7 +85,7 @@ Note 1003 select pow(10,log10(10)) AS `pow(10,log10(10))`,pow(2,4) AS `power(2,4
set @@rand_seed1=10000000,@@rand_seed2=1000000;
select rand(999999),rand();
rand(999999) rand()
0.014231365187309 0.028870999839968
0.0142313651873091 0.028870999839968
explain extended select rand(999999),rand();
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
......@@ -101,7 +101,7 @@ Warnings:
Note 1003 select pi() AS `pi()`,format(sin((pi() / 2)),6) AS `format(sin(pi()/2),6)`,format(cos((pi() / 2)),6) AS `format(cos(pi()/2),6)`,format(abs(tan(pi())),6) AS `format(abs(tan(pi())),6)`,format((1 / tan(1)),6) AS `format(cot(1),6)`,format(asin(1),6) AS `format(asin(1),6)`,format(acos(0),6) AS `format(acos(0),6)`,format(atan(1),6) AS `format(atan(1),6)`
select degrees(pi()),radians(360);
degrees(pi()) radians(360)
180 6.2831853071796
180 6.28318530717959
SELECT ACOS(1.0);
ACOS(1.0)
0
......@@ -321,7 +321,7 @@ mod(5, cast(-2 as unsigned)) mod(5, 18446744073709551614) mod(5, -2)
5 5 1
select pow(cast(-2 as unsigned), 5), pow(18446744073709551614, 5), pow(-2, 5);
pow(cast(-2 as unsigned), 5) pow(18446744073709551614, 5) pow(-2, 5)
2.1359870359209e+96 2.1359870359209e+96 -32
2.13598703592091e+96 2.13598703592091e+96 -32
CREATE TABLE t1 (a timestamp, b varchar(20), c bit(1));
INSERT INTO t1 VALUES('1998-09-23', 'str1', 1), ('2003-03-25', 'str2', 0);
SELECT a DIV 900 y FROM t1 GROUP BY y;
......
mysql-test/r/func_str.result
View file @ 30ac4901
......@@ -1131,10 +1131,10 @@ cast(rtrim(ltrim(' 20.06 ')) as decimal(19,2))
20.06
select conv("18383815659218730760",10,10) + 0;
conv("18383815659218730760",10,10) + 0
1.8383815659219e+19
1.83838156592187e+19
select "18383815659218730760" + 0;
"18383815659218730760" + 0
1.8383815659219e+19
1.83838156592187e+19
CREATE TABLE t1 (code varchar(10));
INSERT INTO t1 VALUES ('a12'), ('A12'), ('a13');
SELECT ASCII(code), code FROM t1 WHERE code='A12';
......
mysql-test/r/gis.result
View file @ 30ac4901
......@@ -284,7 +284,7 @@ Note 1003 select astext(startpoint(`test`.`gis_line`.`g`)) AS `AsText(StartPoint
SELECT fid, AsText(Centroid(g)) FROM gis_polygon;
fid AsText(Centroid(g))
108 POINT(15 15)
109 POINT(25.416666666667 25.416666666667)
109 POINT(25.4166666666667 25.4166666666667)
110 POINT(20 10)
SELECT fid, Area(g) FROM gis_polygon;
fid Area(g)
......@@ -318,8 +318,8 @@ fid IsClosed(g)
116 0
SELECT fid, AsText(Centroid(g)) FROM gis_multi_polygon;
fid AsText(Centroid(g))
117 POINT(55.588527753042 17.426536064114)
118 POINT(55.588527753042 17.426536064114)
117 POINT(55.5885277530424 17.426536064114)
118 POINT(55.5885277530424 17.426536064114)
119 POINT(2 2)
SELECT fid, Area(g) FROM gis_multi_polygon;
fid Area(g)
......@@ -651,11 +651,11 @@ insert into t1 values ('85984',GeomFromText('MULTIPOLYGON(((-115.006363
select object_id, geometrytype(geo), ISSIMPLE(GEO), ASTEXT(centroid(geo)) from
t1 where object_id=85998;
object_id geometrytype(geo) ISSIMPLE(GEO) ASTEXT(centroid(geo))
85998 MULTIPOLYGON 0 POINT(115.31877315203 -36.237472821022)
85998 MULTIPOLYGON 0 POINT(115.318773152032 -36.2374728210215)
select object_id, geometrytype(geo), ISSIMPLE(GEO), ASTEXT(centroid(geo)) from
t1 where object_id=85984;
object_id geometrytype(geo) ISSIMPLE(GEO) ASTEXT(centroid(geo))
85984 MULTIPOLYGON 0 POINT(-114.87787186923 36.33101763469)
85984 MULTIPOLYGON 0 POINT(-114.877871869233 36.3310176346905)
drop table t1;
create table t1 (fl geometry not null);
insert into t1 values (1);
......
mysql-test/r/innodb_gis.result
View file @ 30ac4901
......@@ -291,7 +291,7 @@ Note 1003 select astext(startpoint(`test`.`gis_line`.`g`)) AS `AsText(StartPoint
SELECT fid, AsText(Centroid(g)) FROM gis_polygon ORDER by fid;
fid AsText(Centroid(g))
108 POINT(15 15)
109 POINT(25.416666666667 25.416666666667)
109 POINT(25.4166666666667 25.4166666666667)
110 POINT(20 10)
SELECT fid, Area(g) FROM gis_polygon ORDER by fid;
fid Area(g)
......@@ -325,8 +325,8 @@ fid IsClosed(g)
116 0
SELECT fid, AsText(Centroid(g)) FROM gis_multi_polygon ORDER by fid;
fid AsText(Centroid(g))
117 POINT(55.588527753042 17.426536064114)
118 POINT(55.588527753042 17.426536064114)
117 POINT(55.5885277530424 17.426536064114)
118 POINT(55.5885277530424 17.426536064114)
119 POINT(2 2)
SELECT fid, Area(g) FROM gis_multi_polygon ORDER by fid;
fid Area(g)
......
mysql-test/r/select.result
View file @ 30ac4901
......@@ -2790,26 +2790,26 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
select max(key1) from t1 where key1 <= 0.6158;
max(key1)
0.61580002307892
0.615800023078918
select max(key2) from t2 where key2 <= 1.6158;
max(key2)
1.6158000230789
1.61580002307892
select min(key1) from t1 where key1 >= 0.3762;
min(key1)
0.37619999051094
0.376199990510941
select min(key2) from t2 where key2 >= 1.3762;
min(key2)
1.3761999607086
1.37619996070862
select max(key1), min(key2) from t1, t2
where key1 <= 0.6158 and key2 >= 1.3762;
max(key1) min(key2)
0.61580002307892 1.3761999607086
0.615800023078918 1.37619996070862
select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
max(key1)
0.61580002307892
0.615800023078918
select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
min(key1)
0.37619999051094
0.376199990510941
DROP TABLE t1,t2;
create table t1(a bigint unsigned, b bigint);
insert into t1 values (0xfffffffffffffffff, 0xfffffffffffffffff),
......
mysql-test/r/sp.result
View file @ 30ac4901
......@@ -581,7 +581,7 @@ return 2.7182818284590452354|
set @e = e()|
select e(), @e|
e() @e
2.718281828459 2.718281828459
2.71828182845905 2.71828182845905
drop function if exists inc|
create function inc(i int) returns int
return i+1|
......@@ -618,7 +618,7 @@ create function fun(d double, i int, u int unsigned) returns double
return mul(inc(i), fac(u)) / e()|
select fun(2.3, 3, 5)|
fun(2.3, 3, 5)
176.58213176229
176.582131762292
insert into t2 values (append("xxx", "yyy"), mul(4,3), e())|
insert into t2 values (append("a", "b"), mul(2,mul(3,4)), fun(1.7, 4, 6))|
select * from t2 where s = append("a", "b")|
......@@ -5972,9 +5972,9 @@ CREATE TABLE t3 (f1 INT, f2 FLOAT)|
INSERT INTO t3 VALUES (1, 3.4), (1, 2), (1, 0.9), (2, 8), (2, 7)|
SELECT SUM(f2), bug25373(f1) FROM t3 GROUP BY bug25373(f1) WITH ROLLUP|
SUM(f2) bug25373(f1)
6.3000000715256 1
6.30000007152557 1
15 2
21.300000071526 NULL
21.3000000715256 NULL
DROP FUNCTION bug25373|
DROP TABLE t3|
DROP DATABASE IF EXISTS mysqltest1|
......
mysql-test/r/type_float.result
View file @ 30ac4901
......@@ -385,12 +385,12 @@ Warning 1264 Out of range value adjusted for column 'f1' at row 1
Warning 1264 Out of range value adjusted for column 'f1' at row 2
select f1 + 0e0 from t1;
f1 + 0e0
1.0000000150475e+29
-1.0000000150475e+29
1.0000000150475e+30
-1.0000000150475e+30
1.0000000150475e+30
-1.0000000150475e+30
1.00000001504747e+29
-1.00000001504747e+29
1.00000001504747e+30
-1.00000001504747e+30
1.00000001504747e+30
-1.00000001504747e+30
drop table t1;
create table t1(d double, u bigint unsigned);
insert into t1(d) values (9.22337203685479e18),
......@@ -401,4 +401,9 @@ u
9223372036854790144
18400000000000000000
drop table t1;
CREATE TABLE t1 (f1 DOUBLE);
INSERT INTO t1 VALUES(-1.79769313486231e+308);
SELECT f1 FROM t1;
f1
-1.79769313486231e+308
End of 5.0 tests
mysql-test/t/type_float.test
View file @ 30ac4901
......@@ -267,4 +267,12 @@ select u from t1;
drop table t1;
#
# Bug #21205: Different number of digits for float/doble/real in --ps-protocol
#
CREATE TABLE t1 (f1 DOUBLE);
INSERT INTO t1 VALUES(-1.79769313486231e+308);
SELECT f1 FROM t1;
--echo End of 5.0 tests
sql/sql_string.cc
View file @ 30ac4901
......@@ -125,7 +125,7 @@ bool String::set(double num,uint decimals, CHARSET_INFO *cs)
str_charset=cs;
if (decimals >= NOT_FIXED_DEC)
{
uint32 len= my_sprintf(buff,(buff, "%.14g",num));// Enough for a DATETIME
uint32 len= my_sprintf(buff,(buff, "%.15g",num));// Enough for a DATETIME
return copy(buff, len, &my_charset_latin1, cs, &dummy_errors);
}
#ifdef HAVE_FCONVERT
......@@ -677,7 +677,7 @@ void String::qs_append(const char *str, uint32 len)
void String::qs_append(double d)
{
char *buff = Ptr + str_length;
str_length+= my_sprintf(buff, (buff, "%.14g", d));
str_length+= my_sprintf(buff, (buff, "%.15g", d));
}
void String::qs_append(double *d)
......
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