Impala Built-In Functions

Impala supports several categories of built-in functions. These functions let you perform mathematical calculations, string manipulation, date calculations, and other kinds of data transformations directly in SQL statements.

The categories of functions supported by Impala are:

The following is a list of built-in functions supported in Impala:

ABS
ACOS
ADD_MONTHS
ADDDATE
APPX_MEDIAN
ASCII
ASIN
ATAN
ATAN2
AVG
AVG - Analytic Function
BASE64DECODE
BASE64ENCODE
BITAND
BIN
BITNOT
BITOR
BITXOR
BTRIM
CASE
CASE WHEN
CAST
CEIL, CEILING, DCEIL
CHAR_LENGTH
CHR
COALESCE
CONCAT
CONCAT_WS
CONV
COS
COSH
COT
COUNT
COUNT - Analytic Function
COUNTSET
CUME_DIST
CURRENT_DATABASE
CURRENT_TIMESTAMP
DATE_ADD
DATE_PART
DATE_SUB
DATE_TRUNC
DATEDIFF
DAY
DAYNAME
DAYOFWEEK
DAYOFYEAR
DAYS_ADD
DAYS_SUB
DECODE
DEGREES
DENSE_RANK
E
EFFECTIVE_USER
EXP
EXTRACT
FACTORIAL
FIND_IN_SET
FIRST_VALUE
FLOOR, DFLOOR
FMOD
FNV_HASH
FROM_UNIXTIME
FROM_TIMESTAMP
FROM_UTC_TIMESTAMP
GETBIT
GREATEST
GROUP_CONCAT
GROUP_CONCAT - Analytic Function
HEX
HOUR
HOURS_ADD
HOURS_SUB
IF
IFNULL
INITCAP
INSTR
INT_MONTHS_BETWEEN
IS_INF
IS_NAN
ISFALSE
ISNOTFALSE
ISNOTTRUE
ISNULL
ISTRUE
LAG
LAST_VALUE
LEAD
LEAST
LEFT
LENGTH
LN
LOCATE
LOG
LOG10
LOG2
LOWER, LCASE
LPAD
LTRIM
MAX
MAX - Analytic Function
MAX_INT, MAX_TINYINT, MAX_SMALLINT, MAX_BIGINT
MICROSECONDS_ADD
MICROSECONDS_SUB
MILLISECOND
MILLISECONDS_ADD
MILLISECONDS_SUB
MIN
MIN - Analytic Function
MIN_INT, MIN_TINYINT, MIN_SMALLINT, MIN_BIGINT
MINUTE
MINUTES_ADD
MINUTES_SUB
MOD
MONTH
MONTHNAME
MONTHS_ADD
MONTHS_BETWEEN
MONTHS_SUB
MURMUR_HASH
NANOSECONDS_ADD
NANOSECONDS_SUB
NDV
NEGATIVE
NEXT_DAY
NONNULLVALUE
NOW
NTILE
NULLIF
NULLIFZERO
NULLVALUE
NVL
NVL2
OVER Clause
PARSE_URL
PERCENT_RANK
PI
PID
PMOD
POSITIVE
POW, POWER, DPOW, FPOW
PRECISION
QUARTER
QUOTIENT
RADIANS
RAND, RANDOM
RANK
REGEXP_ESCAPE
REGEXP_EXTRACT
REGEXP_LIKE
REGEXP_REPLACE
REPEAT
REPLACE
REVERSE
RIGHT
ROTATELEFT
ROTATERIGHT
ROUND, DROUND
ROW_NUMBER
RPAD
RTRIM
SCALE
SECOND
SECONDS_ADD
SECONDS_SUB
SETBIT
SHIFTLEFT
SHIFTRIGHT
SIGN
SIN
SINH
SLEEP
SPACE
SPLIT_PART
SQRT
STDDEV, STDDEV_SAMP, STDDEV_POP
STRLEFT
STRRIGHT
SUBDATE
SUBSTR, SUBSTRING
SUM
SUM - Analytic Function
TAN
TANH
TIMEOFDAY
TIMESTAMP_CMP
TO_DATE
TO_TIMESTAMP
TO_UTC_TIMESTAMP
TRANSLATE
TRIM
TRUNC
TRUNCATE, DTRUNC, TRUNC
TYPEOF
UNHEX
UNIX_TIMESTAMP
UPPER, UCASE
USER
UTC_TIMESTAMP
UUID
VARIANCE, VARIANCE_SAMP, VARIANCE_POP, VAR_SAMP, VAR_POP
VERSION
WEEKOFYEAR
WEEKS_ADD
WEEKS_SUB
WIDTH_BUCKET
YEAR
YEARS_ADD
YEARS_SUB
ZEROIFNULL