Compatibility Quick Reference for SPL2 evaluation functions

An SPL2 profile maps to a set of SPL2 commands and functions that are used by a given product. See SPL2 compatibility profiles.

The following table shows which SPL2 evaluation functions are supported for each product profile:

Supported functions and syntax	Description	splunkd 1 profile	edge Processor profile	ingest Processor profile
abs(<num>)	Returns the absolute value of a number.	Yes	Yes	Yes
acos(<x>)	Computes the arc cosine of x.	Yes	Yes	Yes
acosh(<x>)	Computes the arc hyperbolic cosine of x.	Yes	Yes	Yes
asin(<x>)	Computes the arc sine of x.	Yes	Yes	Yes
asinh(<x>)	Computes the arc hyperbolic sine of x.	Yes	Yes	Yes
atan(<x>)	Computes the arc tangent of x.	Yes	Yes	Yes
atan2(<y>,<x>)	Computes the arc tangent of y,x.	Yes	Yes	Yes
atanh(<x>)	Computes the arc hyperbolic tangent of x.	Yes	Yes	Yes
case(<condition>,<value>, ...)	Accepts alternating conditions and values. Returns the first value for which the condition evaluates to TRUE.	Yes	Yes	Yes
ceiling(<num>)or ceil(<num>)	Rounds a number up to the next highest integer.	Yes
cidrmatch(<cidr>,<ip>)	Returns TRUE or FALSE based on whether an IP address matches a CIDR notation.	Yes	Yes	Yes
cluster(<field>,<threshold>,<match>,<delims>)	Generates a cluster label, in the form of a number, for each event based on how similar the events are to each other.	Yes
coalesce(<values>)	Takes one or more values and returns the first value that is not NULL.	Yes	Yes	Yes
cos(<x>)	Computes the cosine of an angle of x radians.	Yes	Yes	Yes
cosh(<x>)	Computes the hyperbolic cosine of x radians.	Yes	Yes	Yes
exact(<expression>)	Returns the result of a numeric eval calculation with a larger amount of precision in the formatted output.	Yes
exp(<num>)	Returns the exponential function eX of a number.	Yes	Yes	Yes
filter(<values>, <predicate>)	Iterates over the values in a JSON array and copies the values that match the specified <predicate> into a new array.	Yes	Yes	Yes
floor(<num>)	Rounds a number down to the nearest whole integer.	Yes
hypot(<x>,<y>)	Computes the hypotenuse of a triangle.	Yes	Yes	Yes
if(<predicate>,<true_value>,<false_value>)	If the <predicate> expression evaluates to TRUE, returns the <true_value>. Otherwise the function returns the <false_value>.	Yes	Yes	Yes
in(<value>,<list>)	Returns TRUE if one of the values in the list matches a value that you specify.	Yes	Yes	Yes
ipmask(<mask>,<IP>)	Generates a new masked IP address by applying a mask to a IPv4 address.	Yes	Yes	Yes
isbool(<value>)	Returns TRUE if the value is Boolean.	Yes	Yes	Yes
isint(<value>)	Returns TRUE if the value is an integer.	Yes	Yes	Yes
isnotnull(<value>)	Returns TRUE if the value is not NULL.	Yes	Yes	Yes
isnull(<value>)	Returns TRUE if the value is NULL.	Yes	Yes	Yes
isnum(<value>)	Returns TRUE if the value is a number.	Yes	Yes	Yes
isstr(<value>)	Returns TRUE if the value is a string.	Yes	Yes	Yes
json_append(<json>, <path_value_pairs>)	Appends elements to the contents of a valid JSON object.	Yes	Yes	Yes
json_array(<values>)	Creates a JSON array using a list of values.	Yes	Yes	Yes
json_array_to_mv(<json_array>, <boolean>)	Maps the elements of a JSON array to a multivalued field.	Yes	Yes	Yes
json_extend(<json>, <path_value_pairs>)	Extends the contents of a valid JSON object with the values of an array.	Yes	Yes	Yes
json_extract(<field>,<paths>)	Returns a value from a field and zero or more paths. The value is returned in either a JSON array, or a Splunk software native type value.	Yes	Yes	Yes
json_extract_exact(<json>, <keys>)	Returns Splunk software native type values from a piece of JSON by matching literal strings in the event and extracting the strings as keys.	Yes	Yes	Yes
json_keys(<json>)	Returns the keys from the key-value pairs in a JSON object. The keys are returned as a JSON array.	Yes	Yes	Yes
json_object(<key>,<value>,...)	Creates a new JSON object from members of key-value pairs.	Yes	Yes	Yes
json_set(<field>,<path_value_pairs>)	Inserts or overwrites values for a JSON node with the path and value pairs provided and returns an updated JSON object.	Yes	Yes	Yes
json_set_exact(<json>, <key_value_pairs>)	Generates or overwrites a JSON object using the key-value pairs specified.	Yes	Yes	Yes
json_valid(<field>)	Evaluates whether a JSON object uses valid JSON syntax and returns either TRUE or FALSE.	Yes	Yes	Yes
len(<str>)	Returns the character length of a string.	Yes	Yes	Yes
like(<str>,<pattern>)	Returns TRUE if the string value matches the pattern.	Yes	Yes	Yes
ln(<num>)	Returns the natural logarithm of a number.	Yes	Yes	Yes
log(<num>,<base>)	Returns the logarithm of a number using a base. The base is optional, and if omitted the log function uses base 10.	Yes	Yes	Yes
lower(<str>)	Converts a string to lowercase.	Yes	Yes	Yes
ltrim(<str>,<trim_chars>)	Removes the trim characters from the left side of the string.	Yes	Yes	Yes
map(<values>, <mapper>)	Iterates over the values in a JSON array and performs an operation on each value in the array.	Yes	Yes	Yes
match(<str>,<regex>)	Returns TRUE if the regular expression finds a match against any substring of the string value. Otherwise returns FALSE.	Yes using PCRE	Yes using RE2	Yes using RE2
max(<values>)	Returns the maximum of the string or numeric values.	Yes
md5(<str>)	Computes and returns the MD5 hash of a string value.	Yes	Yes	Yes
min(<values>)	Returns the minimum of the string or numeric values.	Yes
mvappend(<values>)	Returns a single multivalue result from a list of values.	Yes	Yes	Yes
mvcount(<mv>)	Returns the count of the number of values in the specified multivalue field.	Yes	Yes	Yes
mvdedup(<mv>)	Removes all of the duplicate values from a multivalue field.	Yes	Yes	Yes
mvfilter(<predicate>)	Filters a multivalue field based on a predicate expression. The expression can reference only one field.	Yes
mvfind(<mv>,<regex>)	Returns the index for the first value in a multivalue field that matches a regular expression.	Yes	Yes	Yes
mvindex(<mv>,<start>,<end>)	Returns a subset of the multivalue field using the start and end index values.	Yes	Yes	Yes
mvjoin(<mv>,<delim>)	Concatenates the individual values within the multivalue field using the value of the delimiter as a separator.	Yes	Yes	Yes
mvrange(<start>,<end>,<step>)	Creates a multivalue field based on a range of specified numbers.	Yes	Yes	Yes
mvsort(<mv>)	Returns the values of a multivalue field sorted lexicographically.	Yes
mvzip(<mv_left>,<mv_right>,<delim>)	Combines the values in two multivalue fields. Stitches together the first value in each field, then the second value in each field, and so on. The delimiter is used to specify a delimiting character to join each pair of values.	Yes
mv_to_json_array(<field>,<infer_types>)	Maps the elements of a multivalue field to a JSON array.	Yes	Yes	Yes
now()	Returns the time that the search was started.	Yes
null()	This function takes no arguments and returns NULL.	Yes
nullif(<value1>,<value2>)	Compares two values and returns NULL if <value1> = <value2>. Otherwise it returns <value1>.	Yes
object_to_array(<object>,<key>,<value>)	Converts data that is in an object format into an array format.	Yes
pi()	Returns the constant pi to 11 digits of precision.	Yes	Yes	Yes
pow(<num>,<exp>)	Returns a number to the power of the exponent.	Yes	Yes	Yes
printf(<format>,<values>)	Builds a string value, based on a string format and the values specified.	Yes
random()	Returns a pseudo-random integer ranging from 0 to 231-1.	Yes	Yes	Yes
reduce(<values>, <initialValue>, <accumulator>, <finalizer>)	Iterates over the values in a JSON array and performs an accumulation operation.	Yes	Yes	Yes
relative_time(<time>,<specifier>)	Takes a UNIX time and a relative time specifier and returns the UNIX time value of the specifier applied to the time.	Yes	Yes	Yes
replace(<str>,<regex>,<replacement>)	Substitutes the replacement string for every occurrence of the regular expression in the string.	Yes using PCRE	Yes using RE2	Yes using RE2
round(<num>,<precision>)	Returns a number rounded to the decimal places specified by the precision. The default is to round to an integer.	Yes
rtrim(<str>,<trim_chars>)	Removes the trim characters from the right side of the string.	Yes	Yes	Yes
searchmatch(<search_str>)	Returns TRUE if the event matches the search string.	Yes
sha1(<str>)	Computes and returns the secure hash of a string value, based on the FIPS compliant SHA-1 hash function.	Yes	Yes	Yes
sha256(<str>)	Computes and returns the secure hash of a string value, based on the FIPS compliant SHA-256 hash function.	Yes	Yes	Yes
sha512(<str>)	Computes and returns the secure hash of a string value, based on the FIPS compliant SHA-512 hash function.	Yes	Yes	Yes
sigfig(<num>)	Rounds a number to the appropriate number of significant figures.	Yes
sin(<x>)	Computes the sine of x.	Yes	Yes	Yes
sinh(<x>)	Computes the hyperbolic sine of x.	Yes	Yes	Yes
spath(<value>,<path>)	Extracts information from the structured data formats XML and JSON.	Yes	Yes	Yes
split(<str>,<delim>)	Splits the string values on the delimiter and returns the string values as a multivalue field.	Yes	Yes	Yes
sqrt(<num>)	Returns the square root of a number.	Yes	Yes	Yes
strftime(<time>,<format>)	Takes a UNIX time value and renders the time as a string using the format specified. The UNIX time must be in seconds.	Yes	Yes	Yes
strptime(<str>,<format>)	Takes a human readable time, represented by a string, and parses the time into a UNIX timestamp using the format.	Yes	Yes	Yes
substr(<str>,<start>,<length>)	Returns a substring of a string, beginning at the start index. The length of the substring specifies the number of characters to return.	Yes	Yes	Yes
tan(<x>)	Computes the tangent of x.	Yes	Yes	Yes
tanh(<x>)	Computes the hyperbolic tangent of x.	Yes	Yes	Yes
time()	Returns the wall-clock time, in the UNIX time format, with microsecond resolution.	Yes	Yes	Yes
tojson(<internal_fields>)	Returns a JSON object representation of events or search results.	Yes	Yes	Yes
tonumber(<str>,<base>)	Converts a string to a number. The base is optional. If not specified, base 10 is used.	Yes	Yes	Yes
tostring(<value>,<format>)	Converts a value to a string using the specified format.	Yes	Yes	Yes
trim(<str>,<trim_chars>)	Removes the trim characters from both sides of the string.	Yes	Yes	Yes
typeof(<value>)	Returns a string that indicates the field type, such as Number, String, Boolean, and so forth.	Yes
upper(<str>)	Returns a string in uppercase.	Yes	Yes	Yes
urldecode(<url>)	Returns a URL as an unescaped or decoded URL string.	Yes
validate(<condition>,<value>,...)	Takes a list of conditions and values and returns the value that corresponds to the condition that evaluates to FALSE. This function defaults to NULL if all conditions evaluate to TRUE.	Yes

¹ The splunkd profile is currently used by the Splunk Enterprise SPL2-based app development beta and the Search tab of the Edge Processor solution.

See also

Additional compatibility information

Compatibility Quick Reference for SPL2 commands

SPL2 compatibility profiles

Edge Processor information

SPL2 evaluation functions for Edge Processor pipelines

Regular expression syntax for Edge Processor pipelines

Ingest Processor information

SPL2 evaluation functions for Ingest Processor pipelines

Regular expression syntax for Ingest Processor pipelines

SPL2 information

Quick Reference for SPL2 eval functions

Understanding SPL2 Syntax