%TIMESTAMP{(char-num-expression { : *ISO|*ISO0 : {fractional-seconds}})}
%TIMESTAMP{(date-timestamp-expression { : fractional-seconds})}
If you do not specify a parameter,
or if you specify *SYS as the first parameter, %TIMESTAMP returns
the current system timestamp.
%TIMESTAMP converts the value of the expression from character,
numeric, date or timestamp data to type timestamp.
The converted value is returned as a timestamp.
The first parameter is the value to be converted. If
you do not specify a value, %TIMESTAMP returns the current system
timestamp. Only the first three digits of the fractional
seconds portion of the timestamp will be
set to a non-zero value.
The remaining fractional seconds will be zero.
If the first parameter is a character or numeric expression,
the second parameter is the timestamp format.
Regardless of the input format, the output is returned in *ISO format.
For character input, you can specify either *ISO (the default) or *ISO0. For more information, see Timestamp Data Type.
If the first parameter is numeric, you do not need to specify the second parameter. The only allowed value is *ISO (the default).
The optional third parameter is the number of fractional seconds in the timestamp.

If the first parameter is *SYS or a date
or timestamp expression, the optional second parameter is the number
of fractional seconds in the returned timestamp.
If the first operand is a date, the system converts the date
from its current format to *ISO format
and adds a time of 00.00.00
and zero fractional seconds.

The number of fractional
seconds can be between 0 and 12.
It defaults to 6 fractional seconds.
For more information, see Information Operations or Built-in Functions.
*..1....+....2....+....3....+....4....+....5....+....6....+....7...+....
string = '1960-09-29-12.34.56.000000';
timest = %timestamp(string);
// timest now contains z'1960-09-29-12.34.56.000000'
date = '2001-03-05';
timest = %timestamp(date);
// timest now contains z'2001-03-05-00.00.00.000000'
dsply (%timestamp(*SYS));
// It displays 2014-06-27-01.02.03.421000
dsply (%timestamp(*SYS : 1));
// It displays 2014-06-27-01.02.03.4
dsply (%timestamp(*SYS : 0));
// It displays 2014-06-27-01.02.03