Reserved Clause Truncate

[jenders-polar]

The formatter throws errors when I try to use the "truncate" function in DB2.

token: {
    type: 'RESERVED_CLAUSE',
    raw: 'truncate',
    text: 'TRUNCATE',
    start: 1449,
    precedingWhitespace: ' '
  }

I can make a more detailed reproduction later, if needed.

[JounQin]

Reproduction is always required.