Skip to main content
Sumo Logic

toLowerCase and toUpperCase

The toLowerCase operator takes a string and converts it to all lower case letters. The toUpperCase operator takes a string and converts it to all uppercase letters.

These operators can be useful for normalizing source logs with inconsistent capitalization, such as Windows Event logs, or changing file names and paths for files systems that require all lower case letters. They are especially useful for queries that include conditionals and grouping, in order to reduce the number of groups in the search results.


  • toLowerCase(<string>) [as <field>]
  • toUpperCase(<string>) [as <field>]


  • Non-string fields are not accepted.


Using toUpperCase with a conditional operator

Use the following query to return all the _sourceHost matches in upper case letters.

_sourceCategory=service OR _sourceCategory=search 
| toUpperCase(_sourceHost) as _sourceHost 
| where _sourceHost matches "NITE*"

which provides results like:


Using toLowerCase or toUpperCase with an equating condition

toLowerCase and toUpperCase are useful when you use the equal to sign (=) or the not equal to sign (!=) with Sumo operators. These conditions are case-sensitive in Sumo Logic. The following example uses toLowerCase to convert the hash value to lower case before performing the lookup. 

| limit 1
| toLowerCase ("B101CD29E18A515753409AE86CE68A4CEDBE0D640D385EB24B9BBB69CF8186AE") as hash
| count hash
| fields -_count
| lookup raw from sumo://threat/cs on threat = hash{code}

Using toUpperCase with the count operator

This query also returns all matching _sourceHost values in upper case letters, using the count operator.

_sourceCategory=service OR _sourceCategory=search 
| toUpperCase(_sourceHost) as _sourceHost 
| count by _sourceHost

which produces results like:


Find a user name and convert it to lowercase

This query will search a Source Category for a user name and convert it to lowercase, no matter how the name has been input.

| parse "user=* " as username
| toLowerCase(username) as username
| where username matches "*joe smith*"