"Wang, Mary Y" <mary(dot)y(dot)wang(at)boeing(dot)com> writes:
> Can someone provide a link to the Postgres 8.x documentation that provides information about Null vs. Empty String?
> Here is the situation:
> Currently, the source code performs the following SQL statement :
> UPDATE user_group set subversion_flags='' WHERE user_id='5818' AND group_id='438';
> (This SQL statement worked in a very old version of Postgres)
> and pgsql 8.3.8 returned ERROR: invalid input syntax for integer: ""
You were not getting a NULL there. You were getting an integer zero,
as a result of sloppy input checking in the integer-input routine.
regards, tom lane