The motivation for this example dictionary is to control the indexing of integers (signed and unsigned), and, consequently, to minimize the number of unique words which greatly affect the performance of searching. The dictionary accepts two options: The MAXLEN parameter specifies the maximum length (number of digits) allowed in an integer word. The default value is 6. The REJECTLONG parameter specifies if an overlength integer should be truncated or ignored. If REJECTLONG=FALSE (default), the dictionary returns the first MAXLEN digits of the integer. If REJECTLONG=TRUE, the dictionary treats an overlength integer as a stop word, so that it will not be indexed. mydb# select ts_lexize('intdict', '12345678'); ts_lexize ----------- {123456} Change dictionary options: mydb# ALTER TEXT SEARCH DICTIONARY intdict (MAXLEN = 4, REJECTLONG = true); ALTER TEXT SEARCH DICTIONARY