Link Search Menu Expand Document Documentation Menu

Functions

You must enable fielddata in the document mapping for most string functions to work properly.

The specification shows the return type of the function with a generic type T as the argument. For example, abs(number T) -> T means that the function abs accepts a numerical argument of type T, which could be any subtype of the number type, and it returns the actual type of T as the return type.

The SQL plugin supports the following common functions shared across the SQL and PPL languages.

Mathematical

Function Specification Example
abs abs(number T) -> T SELECT abs(0.5)
add add(number T, number T) -> T SELECT add(1, 5)
cbrt cbrt(number T) -> double SELECT cbrt(8)
ceil ceil(number T) -> T SELECT ceil(0.5)
conv conv(string T, integer, integer) -> string SELECT conv('2C', 16, 10), conv(1111, 2, 10)
crc32 crc32(string) -> string SELECT crc32('MySQL')
divide divide(number T, number T) -> T SELECT divide(1, 0.5)
e e() -> double SELECT e()
exp exp(number T) -> double SELECT exp(0.5)
expm1 expm1(number T) -> double SELECT expm1(0.5)
floor floor(number T) -> long SELECT floor(0.5)
ln ln(number T) -> double SELECT ln(10)
log log(number T) -> double or log(number T, number T) -> double SELECT log(10) -> 2.3, SELECT log(2, 16) -> 4
log2 log2(number T) -> double SELECT log2(10)
log10 log10(number T) -> double SELECT log10(100)
mod mod(number T, number T) -> T SELECT mod(10,4) -> 2
modulus modulus(number T, number T) -> T SELECT modulus(2, 3)
multiply multiply(number T, number T) -> T SELECT multiply(2, 3)
pi pi() -> double SELECT pi()
pow pow(number T, number T) -> double SELECT pow(2, 3)
power power(number T, number T) -> double SELECT power(2, 3)
rand rand() -> float or rand(number T) -> float SELECT rand(), SELECT rand(0.5)
rint rint(number T) -> double SELECT rint(1.5)
round round(number T) -> T or round(number T, integer) -> T SELECT round(1.5), SELECT round(1.175, 2)
sign sign(number T) -> integer SELECT sign(1.5)
signum signum(number T) -> integer SELECT signum(0.5)
sqrt sqrt(number T) -> double SELECT sqrt(0.5)
strcmp strcmp(string T, string T) -> integer SELECT strcmp('hello', 'hello world')
subtract subtract(number T, number T) -> T SELECT subtract(3, 2)
truncate truncate(number T, number T) -> T SELECT truncate(56.78, 1)
+ number T + number T -> T SELECT 1 + 5
- number T - number T -> T SELECT 3 - 2
* number T * number T -> T SELECT 2 * 3
/ number T / number T -> T SELECT 1 / 0.5
% number T % number T -> T SELECT 2 % 3

Trigonometric

Function Specification Example
acos acos(number T) -> double SELECT acos(0.5)
asin asin(number T) -> double SELECT asin(0.5)
atan atan(number T) -> double SELECT atan(0.5)
atan2 atan2(number T, number T) -> double SELECT atan2(1, 0.5)
cos cos(number T) -> double SELECT cos(0.5)
cosh cosh(number T) -> double SELECT cosh(0.5)
cot cot(number T) -> double SELECT cot(0.5)
degrees degrees(number T) -> double SELECT degrees(0.5)
radians radians(number T) -> double SELECT radians(0.5)
sin sin(number T) -> double SELECT sin(0.5)
sinh sinh(number T) -> double SELECT sinh(0.5)
tan tan(number T) -> double SELECT tan(0.5)

Date and time

Functions marked with * are only available in SQL.

Function Specification Example
adddate adddate(date, INTERVAL expr unit) -> date SELECT adddate(date('2020-08-26'), INTERVAL 1 hour)
addtime addtime(date, date) -> date SELECT addtime(date('2008-12-12'), date('2008-12-12'))
convert_tz convert_tz(date, string, string) -> date SELECT convert_tz('2008-12-25 05:30:00', '+00:00', 'America/Los_Angeles')
curtime curtime() -> time SELECT curtime()
curdate curdate() -> date SELECT curdate()
current_date current_date() -> date SELECT current_date()
current_time current_time() -> time SELECT current_time()
current_timestamp current_timestamp() -> date SELECT current_timestamp()
date date(date) -> date SELECT date('2000-01-02')
datediff datediff(date, date) -> integer SELECT datediff(date('2000-01-02'), date('2000-01-01'))
datetime datetime(string) -> datetime SELECT datetime('2008-12-25 00:00:00')
date_add date_add(date, INTERVAL integer UNIT) SELECT date_add('2020-08-26', INTERVAL 1 HOUR)
date_format date_format(date, string) -> string or date_format(date, string, string) -> string SELECT date_format(date('2020-08-26'), 'Y')
date_sub date_sub(date, INTERVAL expr unit) -> date SELECT date_sub(date('2008-01-02'), INTERVAL 31 day)
dayofmonth dayofmonth(date) -> integer SELECT dayofmonth(date('2001-05-07'))
day day(date) -> integer SELECT day(date('2020-08-25'))
dayname dayname(date) -> string SELECT dayname(date('2020-08-26'))
dayofmonth dayofmonth(date) -> integer SELECT dayofmonth(date('2020-08-26'))
dayofweek dayofweek(date) -> integer SELECT dayofweek(date('2020-08-26'))
dayofyear dayofyear(date) -> integer SELECT dayofyear(date('2020-08-26'))
dayofweek dayofweek(date) -> integer SELECT dayofweek(date('2020-08-26'))
day_of_month* day_of_month(date) -> integer SELECT day_of_month(date('2020-08-26'))
day_of_week* day_of_week(date) -> integer SELECT day_of_week(date('2020-08-26'))
day_of_year* day_of_year(date) -> integer SELECT day_of_year(date('2020-08-26'))
extract* extract(part FROM date) -> integer SELECT extract(MONTH FROM datetime('2020-08-26 10:11:12'))
from_days from_days(N) -> integer SELECT from_days(733687)
from_unixtime from_unixtime(N) -> date SELECT from_unixtime(1220249547)
get_format get_format(PART, string) -> string SELECT get_format(DATE, 'USA')
hour hour(time) -> integer SELECT hour(time '01:02:03')
hour_of_day* hour_of_day(time) -> integer SELECT hour_of_day(time '01:02:03')
last_day* last_day(date) -> integer SELECT last_day(date('2020-08-26'))
localtime localtime() -> date SELECT localtime()
localtimestamp localtimestamp() -> date SELECT localtimestamp()
makedate makedate(double, double) -> date SELECT makedate(1945, 5.9)
maketime maketime(integer, integer, integer) -> date SELECT maketime(1, 2, 3)
microsecond microsecond(expr) -> integer SELECT microsecond(time '01:02:03.123456')
minute minute(expr) -> integer SELECT minute(time '01:02:03')
minute_of_day* minute_of_day(expr) -> integer SELECT minute_of_day(time '01:02:03')
minute_of_hour* minute_of_hour(expr) -> integer SELECT minute_of_hour(time '01:02:03')
month month(date) -> integer SELECT month(date('2020-08-26'))
month_of_year* month_of_year(date) -> integer SELECT month_of_year(date('2020-08-26'))
monthname monthname(date) -> string SELECT monthname(date('2020-08-26'))
now now() -> date SELECT now()
period_add period_add(integer, integer) SELECT period_add(200801, 2)
period_diff period_diff(integer, integer) SELECT period_diff(200802, 200703)
quarter quarter(date) -> integer SELECT quarter(date('2020-08-26'))
second second(time) -> integer SELECT second(time '01:02:03')
second_of_minute* second_of_minute(time) -> integer SELECT second_of_minute(time '01:02:03')
sec_to_time* sec_to_time(integer) -> date SELECT sec_to_time(10000)
subdate subdate(date, INTERVAL expr unit) -> date, datetime SELECT subdate(date('2008-01-02'), INTERVAL 31 day)
subtime subtime(date, date) -> date SELECT subtime(date('2008-12-12'), date('2008-11-15'))
str_to_date* str_to_date(string, format) -> date SELECT str_to_date("01,5,2013", "%d,%m,%Y")
time time(expr) -> time SELECT time('13:49:00')
timediff timediff(time, time) -> time SELECT timediff(time('23:59:59'), time('13:00:00'))
timestamp timestamp(date) -> date SELECT timestamp('2001-05-07 00:00:00')
timestampadd timestampadd(interval, integer, date) -> date) SELECT timestampadd(DAY, 17, datetime('2000-01-01 00:00:00'))
timestampdiff timestampdiff(interval, date, date) -> integer SELECT timestampdiff(YEAR, '1997-01-01 00:00:00', '2001-03-06 00:00:00')
time_format time_format(date, string) -> string SELECT time_format('1998-01-31 13:14:15.012345', '%f %H %h %I %i %p %r %S %s %T')
time_to_sec time_to_sec(time) -> long SELECT time_to_sec(time '22:23:00')
to_days to_days(date) -> long SELECT to_days(date '2008-10-07')
to_seconds to_seconds(date) -> integer SELECT to_seconds(date('2008-10-07'))
unix_timestamp unix_timestamp(date) -> double SELECT unix_timestamp(timestamp('1996-11-15 17:05:42'))
utc_date utc_date() -> date SELECT utc_date()
utc_time utc_time() -> date SELECT utc_time()
utc_timestamp utc_timestamp() -> date SELECT utc_timestamp()
week week(date[mode]) -> integer SELECT week(date('2008-02-20'))
weekofyear weekofyear(date[mode]) -> integer SELECT weekofyear(date('2008-02-20'))
week_of_year* week_of_year(date[mode]) -> integer SELECT week_of_year(date('2008-02-20'))
year year(date) -> integer SELECT year(date('2001-07-05'))
yearweek* yearweek(date[mode]) -> integer SELECT yearweek(date('2008-02-20'))

String

Function Specification Example
ascii ascii(string) -> integer SELECT ascii('h')
concat concat(string, string) -> string SELECT concat('hello', 'world')
concat_ws concat_ws(separator, string, string…) -> string SELECT concat_ws(" ", "Hello", "World!")
left left(string, integer) -> string SELECT left('hello', 2)
length length(string) -> integer SELECT length('hello')
locate locate(string, string, integer) -> integer or locate(string, string) -> integer SELECT locate('o', 'hello'), locate('l', 'hello world', 5)
replace replace(string, string, string) -> string SELECT replace('hello', 'l', 'x')
right right(string, integer) -> string SELECT right('hello', 2)
rtrim rtrim(string) -> string SELECT rtrim('hello ')
substring substring(string, integer, integer) -> string SELECT substring('hello', 2, 2) -> 'el'
trim trim(string) -> string SELECT trim(' hello')
upper upper(string) -> string SELECT upper('hello world')

Aggregate

Function Specification Example
avg avg(number T) -> T SELECT avg(column) FROM my-index
count count(number T) -> T SELECT count(date) FROM my-index
min min(number T) -> T SELECT min(column) FROM my-index
show show(string) -> string SHOW TABLES LIKE my-index

Advanced

Function Specification Example
if if(boolean, os_type, os_type) -> os_type SELECT if(false, 0, 1),if(true, 0, 1)
ifnull ifnull(os_type, os_type) -> os_type SELECT ifnull(0, 1), ifnull(null, 1)
isnull isnull(os_type) -> integer SELECT isnull(null), isnull(1)

These functions are only available in the WHERE clause. For their descriptions and usage examples in SQL and PPL, see Full-text search.

350 characters left

Have a question? .

Want to contribute? or .