简单，只需选择trunc（timestamp，'d'）+interval 1天；

你应该使用 trunc(timestamp, 'J') . 请参阅文档中的日期，您使用的是“一周中的开始日期”：

trunc(timestamp, string unit)
Purpose: Strips off fields from a TIMESTAMP value.
Unit argument: The unit argument value is case-sensitive. This argument string can be one of:
SYYYY, YYYY, YEAR, SYEAR, YYY, YY, Y: Year.
Q: Quarter.
MONTH, MON, MM, RM: Month.
WW, W: Same day of the week as the first day of the month.
DDD, DD, J: Day.
DAY, DY, D: Starting day of the week. (Not necessarily the current day.)
HH, HH12, HH24: Hour. A TIMESTAMP value truncated to the hour is always represented in 24-hour notation, even for the HH12 argument string.
MI: Minute.

https://www.cloudera.com/documentation/enterprise/latest/topics/impala_datetime_functions.html