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psql: initialize comment-begin setting to a useful value by default.

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Readline's meta-# command is supposed to insert a comment marker
at the start of the current line.  However, the default marker is
"#" which is entirely unhelpful for SQL.  Set it to "-- " instead.
(This setting can still be overridden in one's ~/.inputrc file,
so this change won't affect people who have already taken steps
to make the command useful.)

Discussion: https://postgr.es/m/CAJcOf-cAdMVr7azeYR7nWKsNp7qhORzc84rV6d7m7knG5Hrtsw@mail.gmail.com
This commit is contained in:
Tom Lane 2021-12-01 12:24:50 -05:00
parent c2f654930e
commit 3d858af07e
1 changed files with 6 additions and 1 deletions
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7
src/bin/psql/input.c
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@ -353,8 +353,13 @@ initializeInput(int flags)
useReadline = true; useReadline = true;
/* these two things must be done in this order: */ /* set appropriate values for Readline's global variables */
initialize_readline(); initialize_readline();
/* set comment-begin to a useful value for SQL */
(void) rl_variable_bind("comment-begin", "-- ");
/* this reads ~/.inputrc, so do it after rl_variable_bind */
rl_initialize(); rl_initialize();
useHistory = true; useHistory = true;