Size of character sets and searching clue words

There is an inverse relationship between the number of characters a character set supports in an index and the number of characters in a clue word that are searched. The following table shows how many characters each character set supports in an index and the number of characters in a clue word that are searched for that character set.

Character set	Max number of characters in index	Number of characters searched in clue word
ASCII	62	First 24
OVERLAP_ISO	124	First 20
ISO	124	First 20
User specified	256	First 16

For example, in an index created with a user-defined character set, only the first 16 characters of a clue word are used in the search. This means that any word in the index that matches the first 16 characters of the clue word is a hit. In the following query the clue is nonintercompatibility:

select title from reports 
where etx_contains(abstract, 'nonintercompatibility');