How to configure Presto searches to be case-insensitive?

You have to explicitly ask for case-insensitive comparison by normalizing compared values either to-lower, or to-upper, like this:

select * from table where lower(name) like '%a%';

select * from table where lower(name) = lower('Adam');

You can use regexp_like(), and prepend the regexp with (?i) for case insensitivity

select 
  * 
from table_name 
where 
  regexp_like(column_name, '(?i)fOO');  -- column contains fOO or FOO

select 
  * 
from table_name 
where 
  regexp_like(column_name, '(?i)^Foo'); -- column starts with fOO or FOO

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