Ron Johnson <[EMAIL PROTECTED]> writes:
> What's the inverse?  Say I have a DATE and a TIME, and want to
> create a TIMESTAMP with them?

Add 'em together, using the "date + time" or "date + timetz" operator:

regression=# select current_date + '11:57'::time;
      ?column?       
---------------------
 2006-07-30 11:57:00
(1 row)

regression=# select current_date + '11:57-04'::timetz;
        ?column?        
------------------------
 2006-07-30 11:57:00-04
(1 row)

See "Date/Time Operators" in the manual.  I believe these operations
are SQL-standard.

                        regards, tom lane

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