Why does N1QL use Collation Order for WHERE filters?

[vsr1]

SELECT y FROM default WHERE x < 99;

    Will get any documents that have x value as 
                  boolean (true, false)   or 
                  x value < 99 . 
     Any documents that 
                 x >= 99 or 
                   string or
                  array or
                  object or 
                   binary  or 
                  null or 
                 MISSING field 
      will not get. same is true  <= except equal value.

ORDER BY clause | Couchbase Docs

The value of y is irrelevant.

@Joshua_Fox

I thought that it doesn’t make a difference if I use < or <= .

x < 99 means 99 value is not included, x <= 99 means 99 value included.