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ES|QL LOG function

Serverless

Elastic Cloud Serverless projects are autoscaled environments, fully managed by Elastic and available on Elastic Cloud.

Availability

  • Generally available

    This functionality is generally available and ready for production usage.

Serverless interfaces and procedures might differ from classic Elastic Stack deployments.

Stack

The Elastic Stack includes Elastic's core products such as Elasticsearch, Kibana, Logstash, and Beats.

Availability

  • Generally available

    This functionality is generally available and ready for production usage.

Unless stated otherwise on the page, this functionality is available when your Elastic Stack is deployed on Elastic Cloud Hosted, Elastic Cloud Enterprise, Elastic Cloud on Kubernetes, and self-managed environments.

This documentation corresponds to the latest patch available for each minor version. If you're not using the latest patch, check the release notes for changes.

Returns the logarithm of a value to a base.

Embedded
Embedded
base
Base of logarithm. If null, the function returns null. If not provided, this function returns the natural logarithm (base e) of a value.
number

Numeric expression. If null, the function returns null.

Returns the logarithm of a value to a base. The input can be any numeric value, the return value is always a double. Logs of zero, negative numbers, and base of one return null as well as a warning.

base number result
double double double
double integer double
double long double
double unsigned_long double
integer double double
integer integer double
integer long double
integer unsigned_long double
long double double
long integer double
long long double
long unsigned_long double
unsigned_long double double
unsigned_long integer double
unsigned_long long double
unsigned_long unsigned_long double
double double
integer double
long double
unsigned_long double
ES|QL 
ROW base = 2.0, value = 8.0
| EVAL s = LOG(base, value)
base: double value: double s:double
2.0 8.0 3.0
ES|QL 
ROW value = 100
| EVAL s = LOG(value);
value: integer s:double
100 4.605170185988092