On 12/26/23 17:36, Tom Lane wrote:
Kevin Wang <kevinpgcl...@gmail.com> writes:
As you know, we can use the UP arrow key to get the previous command to
avoid extra typing. This is a wonderful feature to save the lives of every
DBA. However, if I type the commands like this sequence: A, B, B, B, B, B,
B, as you can see, B is the last command I execute.
But if I try to get command A, I have to press the UP key 7 times. I think
the best way is: when you press the UP key, plsql should show the command
that is different from the previous command, so the recall sequence should
be B -> A, not B -> B -> ... -> A. Then I only press the UP key 2 times to
get command A.
This is driven by libreadline, not anything we control. I have
seen the behavior you describe in some other programs, so I wonder
whether it's configurable.
It is kind of something we control. Per the psql docs, setting
HISTCONTROL=ignoredups
will do the trick.
https://www.postgresql.org/docs/current/app-psql.html#APP-PSQL-VARIABLES-HISTCONTROL
--
Vik Fearing
