Обсуждение: DEFAULT in update & prepared statements
Can DEFAULT (defined for a timestamp column as now() ) be used in
1. prepared statement i.e. EXECUTE ( ..., DEFAULT, ...)
2. in an UPDATE statement UPDATE TABLE SET update_time = DEFAULT ...
2. in an UPDATE statement UPDATE TABLE SET update_time = DEFAULT ...
thanks
Sanjay
On Wednesday, November 8, 2023, Sanjay Minni <sanjay.minni@gmail.com> wrote:
Can DEFAULT (defined for a timestamp column as now() ) be used in1. prepared statement i.e. EXECUTE ( ..., DEFAULT, ...)
2. in an UPDATE statement UPDATE TABLE SET update_time = DEFAULT ..
5 seconds looking at the syntax for update in the docs answers the second question.
The first question doesn’t really make sense - but regardless of what you are trying to communicate there just try it. If the result you get doesn’t make sense post what you tried.
David J.
On Wednesday, November 8, 2023, David G. Johnston <david.g.johnston@gmail.com> wrote:
On Wednesday, November 8, 2023, Sanjay Minni <sanjay.minni@gmail.com> wrote:Can DEFAULT (defined for a timestamp column as now() ) be used in1. prepared statement i.e. EXECUTE ( ..., DEFAULT, ...)
2. in an UPDATE statement UPDATE TABLE SET update_time = DEFAULT ..5 seconds looking at the syntax for update in the docs answers the second question.The first question doesn’t really make sense - but regardless of what you are trying to communicate there just try it. If the result you get doesn’t make sense post what you tried.
As the docs do not show DEFAULT for execute the answer is indeed no for the first question. Default behaves as syntax for the query and syntax, like identifiers, cannot be parameterized.
David J.