Re: [HACKERS] time stops within transaction

[Tom Lane]

Peter Eisentraut <[EMAIL PROTECTED]> writes:
> Tom Lane writes:
>> That is what now() is defined to return: transaction start time.

> Then CURRENT_TIMESTAMP is in violation of SQL.

Au contraire, if it did not behave that way it would violate the spec.
See SQL92 6.8 general rule 3:

         3) If an SQL-statement generally contains more than one reference
            to one or more <datetime value function>s, then all such ref-
            erences are effectively evaluated simultaneously. The time of
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
            evaluation of the <datetime value function> during the execution
            of the SQL-statement is implementation-dependent.

                        regards, tom lane