Vertica supports several special date/time values for our convenience. All of these values need to be written in single quotes when used as constants in SQL statements.
My favorite is ALLBALLS which is named so because the time digits look like balls (I had to Google that).
Example:
dbadmin=> SELECT timestamp 'today' midnight_today, dbadmin-> timestamp 'yesterday' midnight_yesterday, dbadmin-> timestamp 'tomorrow' midnight_tomorrow, dbadmin-> time 'allballs' midnight_utc_time; midnight_today | midnight_yesterday | midnight_tomorrow | midnight_utc_time ---------------------+---------------------+---------------------+------------------- 2018-10-15 00:00:00 | 2018-10-14 00:00:00 | 2018-10-16 00:00:00 | 00:00:00 (1 row)
