On 9/8/07, Sibte Abbas <[EMAIL PROTECTED]> wrote: > > > Hi all, > > Realizing that the mentioned TODO item discussed at > http://archives.postgresql.org/pgsql-hackers/2006-12/msg00255.php > <http://archives.postgresql.org/pgsql-hackers/2006-12/msg00255.php> can be > useful for myself and others as well, I would like to go ahead and implement > it. > > Synopsis: > ====== > > Sticking to the syntax and semantics which Joshua already mentioned in the > thread: > > \#: displays the command history. Like \s but prefixes the lines with line > numbers > > \# <line_no>: executes the command(if any) executed at the line specified > by line_no > > > Display the history contents: > ================= > > Well the answer to this pretty much lies in the \s (without any filename) > implementation. However \s simply writes the contents of the history to the > TTY while \# would prefix all the history lines with their respective line > numbers. > > Because of this difference, we'll have to employ a more flexible approach > rather than simply using the write_history() function. > > A solution to this is to use history_list() function to get a list of > HIST_ENTRY structures and simply display them as per our needs i.e. to > prefix each line with incrementing numbers in our case. > > Execute a line based on line number: > ====================== > > For this we can simply use the history_get(int offset) function of the gnu > history api to return a HIST_ENTRY structure corresponding to the given > offset. > > The returned HIST_ENTRY can then be used to access the command that was > executed at that specific line number. > > Comments are welcomed. > > regards, > -- > Sibte Abbas >
Patch submitted to pgsql-patches. regards, -- Sibte Abbas
