drop table if exists t1; select floor(5.5),floor(-5.5); floor(5.5) floor(-5.5) 5 -6 explain extended select floor(5.5),floor(-5.5); 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 Warnings: Note 1003 select floor(5.5) AS `floor(5.5)`,floor(-(5.5)) AS `floor(-5.5)` select ceiling(5.5),ceiling(-5.5); ceiling(5.5) ceiling(-5.5) 6 -5 explain extended select ceiling(5.5),ceiling(-5.5); 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 Warnings: Note 1003 select ceiling(5.5) AS `ceiling(5.5)`,ceiling(-(5.5)) AS `ceiling(-5.5)` select truncate(52.64,1),truncate(52.64,2),truncate(52.64,-1),truncate(52.64,-2), truncate(-52.64,1),truncate(-52.64,-1); truncate(52.64,1) truncate(52.64,2) truncate(52.64,-1) truncate(52.64,-2) truncate(-52.64,1) truncate(-52.64,-1) 52.6 52.64 50 0 -52.6 -50 explain extended select truncate(52.64,1),truncate(52.64,2),truncate(52.64,-1),truncate(52.64,-2), truncate(-52.64,1),truncate(-52.64,-1); 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 Warnings: Note 1003 select truncate(52.64,1) AS `truncate(52.64,1)`,truncate(52.64,2) AS `truncate(52.64,2)`,truncate(52.64,-(1)) AS `truncate(52.64,-1)`,truncate(52.64,-(2)) AS `truncate(52.64,-2)`,truncate(-(52.64),1) AS `truncate(-52.64,1)`,truncate(-(52.64),-(1)) AS `truncate(-52.64,-1)` select round(5.5),round(-5.5); round(5.5) round(-5.5) 6 -6 explain extended select round(5.5),round(-5.5); 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 Warnings: Note 1003 select round(5.5,0) AS `round(5.5)`,round(-(5.5),0) AS `round(-5.5)` select round(5.64,1),round(5.64,2),round(5.64,-1),round(5.64,-2); round(5.64,1) round(5.64,2) round(5.64,-1) round(5.64,-2) 5.6 5.64 10 0 select abs(-10), sign(-5), sign(5), sign(0); abs(-10) sign(-5) sign(5) sign(0) 10 -1 1 0 explain extended select abs(-10), sign(-5), sign(5), sign(0); 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 Warnings: Note 1003 select abs(-(10)) AS `abs(-10)`,sign(-(5)) AS `sign(-5)`,sign(5) AS `sign(5)`,sign(0) AS `sign(0)` 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 10 NULL NULL NULL 2 NULL NULL explain extended 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); 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 Warnings: Note 1003 select log(exp(10)) AS `log(exp(10))`,exp((log(sqrt(10)) * 2)) AS `exp(log(sqrt(10))*2)`,log(-(1)) AS `log(-1)`,log(NULL) AS `log(NULL)`,log(1,1) AS `log(1,1)`,log(3,9) AS `log(3,9)`,log(-(1),2) AS `log(-1,2)`,log(NULL,2) AS `log(NULL,2)` 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 10 NULL NULL NULL explain extended select ln(exp(10)),exp(ln(sqrt(10))*2),ln(-1),ln(0),ln(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 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 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 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 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 Warnings: Note 1003 select log10(100) AS `log10(100)`,log10(18) AS `log10(18)`,log10(-(4)) AS `log10(-4)`,log10(0) AS `log10(0)`,log10(NULL) AS `log10(NULL)` select pow(10,log10(10)),power(2,4); pow(10,log10(10)) power(2,4) 10 16 explain extended select pow(10,log10(10)),power(2,4); 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 Warnings: 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 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 Warnings: Note 1003 select rand(999999) AS `rand(999999)`,rand() AS `rand()` select pi(),format(sin(pi()/2),6),format(cos(pi()/2),6),format(abs(tan(pi())),6),format(cot(1),6),format(asin(1),6),format(acos(0),6),format(atan(1),6); pi() format(sin(pi()/2),6) format(cos(pi()/2),6) format(abs(tan(pi())),6) format(cot(1),6) format(asin(1),6) format(acos(0),6) format(atan(1),6) 3.141593 1.000000 0.000000 0.000000 0.642093 1.570796 1.570796 0.785398 explain extended select pi(),format(sin(pi()/2),6),format(cos(pi()/2),6),format(abs(tan(pi())),6),format(cot(1),6),format(asin(1),6),format(acos(0),6),format(atan(1),6); 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 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 SELECT ACOS(1.0); ACOS(1.0) 0 SELECT ASIN(1.0); ASIN(1.0) 1.5707963267949 SELECT ACOS(0.2*5.0); ACOS(0.2*5.0) 0 SELECT ACOS(0.5*2.0); ACOS(0.5*2.0) 0 SELECT ASIN(0.8+0.2); ASIN(0.8+0.2) 1.5707963267949 SELECT ASIN(1.2-0.2); ASIN(1.2-0.2) 1.5707963267949 select format(4.55, 1), format(4.551, 1); format(4.55, 1) format(4.551, 1) 4.6 4.6 explain extended select degrees(pi()),radians(360); 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 Warnings: Note 1003 select degrees(pi()) AS `degrees(pi())`,radians(360) AS `radians(360)` select rand(rand); ERROR 42S22: Unknown column 'rand' in 'field list' create table t1 (col1 int, col2 decimal(60,30)); insert into t1 values(1,1234567890.12345); select format(col2,7) from t1; format(col2,7) 1,234,567,890.1234500 select format(col2,8) from t1; format(col2,8) 1,234,567,890.12345000 insert into t1 values(7,1234567890123456.12345); select format(col2,6) from t1 where col1=7; format(col2,6) 1,234,567,890,123,456.123450 drop table t1; select ceil(0.09); ceil(0.09) 1 select ceil(0.000000000000000009); ceil(0.000000000000000009) 1 create table t1 select round(1, 6); show create table t1; Table Create Table t1 CREATE TABLE `t1` ( `round(1, 6)` int(1) NOT NULL default '0' ) ENGINE=MyISAM DEFAULT CHARSET=latin1 select * from t1; round(1, 6) 1 drop table t1; select abs(-2) * -2; abs(-2) * -2 -4 create table t1 (i int); insert into t1 values (1); select rand(i) from t1; ERROR HY000: Incorrect arguments to RAND drop table t1; create table t1 (a varchar(90), ts datetime not null, index (a)) engine=innodb default charset=utf8; insert into t1 values ('http://www.foo.com/', now()); select a from t1 where a='http://www.foo.com/' order by abs(timediff(ts, 0)); a http://www.foo.com/ drop table t1; set sql_mode='traditional'; select ln(-1); ln(-1) NULL Warnings: Error 1365 Division by 0 select log10(-1); log10(-1) NULL Warnings: Error 1365 Division by 0 select log2(-1); log2(-1) NULL Warnings: Error 1365 Division by 0 select log(2,-1); log(2,-1) NULL Warnings: Error 1365 Division by 0 select log(-2,1); log(-2,1) NULL Warnings: Error 1365 Division by 0 set sql_mode=''; select round(111,-10); round(111,-10) 0 select round(-5000111000111000155,-1); round(-5000111000111000155,-1) -5000111000111000160 select round(15000111000111000155,-1); round(15000111000111000155,-1) 15000111000111000160 select truncate(-5000111000111000155,-1); truncate(-5000111000111000155,-1) -5000111000111000150 select truncate(15000111000111000155,-1); truncate(15000111000111000155,-1) 15000111000111000150 set names utf8; create table t1 (f1 varchar(32) not null, f2 smallint(5) unsigned not null, f3 int(10) unsigned not null default '0') engine=myisam default charset=utf8; insert into t1 values ('zombie',0,0),('gold',1,10000),('silver',2,10000); create table t2 (f1 int(10) unsigned not null, f2 int(10) unsigned not null, f3 smallint(5) unsigned not null) engine=myisam default charset=utf8; insert into t2 values (16777216,16787215,1),(33554432,33564431,2); select format(t2.f2-t2.f1+1,0) from t1,t2 where t1.f2 = t2.f3 order by t1.f1; format(t2.f2-t2.f1+1,0) 10,000 10,000 drop table t1, t2; set names default; select cast(-2 as unsigned), 18446744073709551614, -2; cast(-2 as unsigned) 18446744073709551614 -2 18446744073709551614 18446744073709551614 -2 select abs(cast(-2 as unsigned)), abs(18446744073709551614), abs(-2); abs(cast(-2 as unsigned)) abs(18446744073709551614) abs(-2) 18446744073709551614 18446744073709551614 2 select ceiling(cast(-2 as unsigned)), ceiling(18446744073709551614), ceiling(-2); ceiling(cast(-2 as unsigned)) ceiling(18446744073709551614) ceiling(-2) 18446744073709551614 18446744073709551614 -2 select floor(cast(-2 as unsigned)), floor(18446744073709551614), floor(-2); floor(cast(-2 as unsigned)) floor(18446744073709551614) floor(-2) 18446744073709551614 18446744073709551614 -2 select format(cast(-2 as unsigned), 2), format(18446744073709551614, 2), format(-2, 2); format(cast(-2 as unsigned), 2) format(18446744073709551614, 2) format(-2, 2) 18,446,744,073,709,551,614.00 18,446,744,073,709,551,614.00 -2.00 select sqrt(cast(-2 as unsigned)), sqrt(18446744073709551614), sqrt(-2); sqrt(cast(-2 as unsigned)) sqrt(18446744073709551614) sqrt(-2) 4294967296 4294967296 NULL select round(cast(-2 as unsigned), 1), round(18446744073709551614, 1), round(-2, 1); round(cast(-2 as unsigned), 1) round(18446744073709551614, 1) round(-2, 1) 18446744073709551614 18446744073709551614 -2 select round(4, cast(-2 as unsigned)), round(4, 18446744073709551614), round(4, -2); round(4, cast(-2 as unsigned)) round(4, 18446744073709551614) round(4, -2) 4 4 0 select truncate(cast(-2 as unsigned), 1), truncate(18446744073709551614, 1), truncate(-2, 1); truncate(cast(-2 as unsigned), 1) truncate(18446744073709551614, 1) truncate(-2, 1) 18446744073709551614 18446744073709551614 -2 select truncate(4, cast(-2 as unsigned)), truncate(4, 18446744073709551614), truncate(4, -2); truncate(4, cast(-2 as unsigned)) truncate(4, 18446744073709551614) truncate(4, -2) 4 4 0 select round(10000000000000000000, -19), truncate(10000000000000000000, -19); round(10000000000000000000, -19) truncate(10000000000000000000, -19) 10000000000000000000 10000000000000000000 select round(1e0, -309), truncate(1e0, -309); round(1e0, -309) truncate(1e0, -309) 0 0 select round(1e1,308), truncate(1e1, 308); round(1e1,308) truncate(1e1, 308) 10 10 select round(1e1, 2147483648), truncate(1e1, 2147483648); round(1e1, 2147483648) truncate(1e1, 2147483648) 10 10 select round(1.1e1, 4294967295), truncate(1.1e1, 4294967295); round(1.1e1, 4294967295) truncate(1.1e1, 4294967295) 11 11 select round(1.12e1, 4294967296), truncate(1.12e1, 4294967296); round(1.12e1, 4294967296) truncate(1.12e1, 4294967296) 11.2 11.2 select round(1.5, 2147483640), truncate(1.5, 2147483640); round(1.5, 2147483640) truncate(1.5, 2147483640) 1.500000000000000000000000000000 1.500000000000000000000000000000 select round(1.5, -2147483649), round(1.5, 2147483648); round(1.5, -2147483649) round(1.5, 2147483648) 0 1.500000000000000000000000000000 select truncate(1.5, -2147483649), truncate(1.5, 2147483648); truncate(1.5, -2147483649) truncate(1.5, 2147483648) 0 1.500000000000000000000000000000 select round(1.5, -4294967296), round(1.5, 4294967296); round(1.5, -4294967296) round(1.5, 4294967296) 0 1.500000000000000000000000000000 select truncate(1.5, -4294967296), truncate(1.5, 4294967296); truncate(1.5, -4294967296) truncate(1.5, 4294967296) 0 1.500000000000000000000000000000 select round(1.5, -9223372036854775808), round(1.5, 9223372036854775808); round(1.5, -9223372036854775808) round(1.5, 9223372036854775808) 0 1.500000000000000000000000000000 select truncate(1.5, -9223372036854775808), truncate(1.5, 9223372036854775808); truncate(1.5, -9223372036854775808) truncate(1.5, 9223372036854775808) 0 1.500000000000000000000000000000 select round(1.5, 18446744073709551615), truncate(1.5, 18446744073709551615); round(1.5, 18446744073709551615) truncate(1.5, 18446744073709551615) 1.500000000000000000000000000000 1.500000000000000000000000000000 select round(18446744073709551614, -1), truncate(18446744073709551614, -1); round(18446744073709551614, -1) truncate(18446744073709551614, -1) 18446744073709551610 18446744073709551610 select round(4, -4294967200), truncate(4, -4294967200); round(4, -4294967200) truncate(4, -4294967200) 0 0 select mod(cast(-2 as unsigned), 3), mod(18446744073709551614, 3), mod(-2, 3); mod(cast(-2 as unsigned), 3) mod(18446744073709551614, 3) mod(-2, 3) 2 2 -2 select mod(5, cast(-2 as unsigned)), mod(5, 18446744073709551614), mod(5, -2); 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 End of 5.0 tests