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Time Functions
Version 0.9.1
This section describes functions and operators for examining and manipulating TIME
values.
Time Operators
The table below shows the available mathematical operators for TIME
types.
Operator | Description | Example | Result |
---|---|---|---|
+ |
addition of an INTERVAL |
TIME '01:02:03' + INTERVAL 5 HOUR |
06:02:03 |
- |
subtraction of an INTERVAL |
TIME '06:02:03' - INTERVAL 5 HOUR' |
01:02:03 |
Time Functions
The table below shows the available scalar functions for TIME
types.
Function | Description | Example | Result |
---|---|---|---|
current_time /get_current_time() |
Current time (start of current transaction) | ||
date_diff( part , starttime , endtime ) |
The number of partition boundaries between the times | date_diff('hour', TIME '01:02:03', TIME '06:01:03') |
5 |
datediff( part , starttime , endtime ) |
Alias of date_diff. The number of partition boundaries between the times | datediff('hour', TIME '01:02:03', TIME '06:01:03') |
5 |
date_part( part , time ) |
Get subfield (equivalent to extract) | date_part('minute', TIME '14:21:13') |
21 |
datepart( part , time ) |
Alias of date_part. Get subfield (equivalent to extract) | datepart('minute', TIME '14:21:13') |
21 |
date_sub( part , starttime , endtime ) |
The number of complete partitions between the times | date_sub('hour', TIME '01:02:03', TIME '06:01:03') |
4 |
datesub( part , starttime , endtime ) |
Alias of date_sub. The number of complete partitions between the times | datesub('hour', TIME '01:02:03', TIME '06:01:03') |
4 |
extract( part FROM time ) |
Get subfield from a time | extract('hour' FROM TIME '14:21:13') |
14 |
make_time( bigint , bigint , double ) |
The time for the given parts | make_time(13, 34, 27.123456) |
13:34:27.123456 |
The only date parts that are defined for times are epoch
, hours
, minutes
, seconds
, milliseconds
and microseconds
.
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