parse
PREPARE TRANSACTION 'id'
----
PREPARE TRANSACTION 'id'
PREPARE TRANSACTION ('id') -- fully parenthesized
PREPARE TRANSACTION '_' -- literals removed
PREPARE TRANSACTION 'id' -- identifiers removed

parse
COMMIT PREPARED 'id'
----
COMMIT PREPARED 'id'
COMMIT PREPARED ('id') -- fully parenthesized
COMMIT PREPARED '_' -- literals removed
COMMIT PREPARED 'id' -- identifiers removed

parse
ROLLBACK PREPARED 'id'
----
ROLLBACK PREPARED 'id'
ROLLBACK PREPARED ('id') -- fully parenthesized
ROLLBACK PREPARED '_' -- literals removed
ROLLBACK PREPARED 'id' -- identifiers removed
