elasticsearch/docs/reference/esql/functions/pow.asciidoc

[discrete]
[[esql-pow]]
=== `POW`
[.text-center]
image::esql/functions/signature/pow.svg[Embedded,opts=inline]

Returns the value of a base (first argument) raised to the power of an exponent (second argument).
Both arguments must be numeric. The output is always a double.  Note that it is still possible to overflow
a double result here; in that case, null will be returned.

[source.merge.styled,esql]
----
include::{esql-specs}/math.csv-spec[tag=powDI]
----
[%header.monospaced.styled,format=dsv,separator=|]
|===
include::{esql-specs}/math.csv-spec[tag=powDI-result]
|===


[discrete]
==== Fractional exponents

The exponent can be a fraction, which is similar to performing a root.
For example, the exponent of `0.5` will give the square root of the base:

[source.merge.styled,esql]
----
include::{esql-specs}/math.csv-spec[tag=powID-sqrt]
----
[%header.monospaced.styled,format=dsv,separator=|]
|===
include::{esql-specs}/math.csv-spec[tag=powID-sqrt-result]
|===

[discrete]
==== Table of supported input and output types

For clarity, the following table describes the output result type for all combinations of numeric input types:

include::types/pow.asciidoc[]