Arrow keys up,down,right,left returning A,B,C,D respectively only with MQL prompt.

[preetampatil3d]

While using MQL prompt in EC2Box terminal, arrow keys returning characters such as A,B,C,D instead of its normal functionality like arrow-up key for last history command.
[MQL ref : http://enoviaplm.blogspot.in/2009/07/mql-commands.html ]

At beginning i though data is getting replaced in terms.js, but actually jsch only returning such data ('A' for up arrow key . . ) . i have tried arrow-up key inside MQL prompt on putty and its working properly.

I also tried with mysql prompt also, Keys are working properly.
Can you please tell us why its returning such chars only with MQL prompt.

Thanks in advance.

[skavanagh]

Things like this seem to happen when the term is set wrong.

env | grep TERM

should tell you what it's set to. I guess you should check before you launch MQL.

[preetampatil3d]

I have checked "TERM" variable on various systems where i was getting arrow issue with MQL prompt.
On all systems it is set to 'xterm' (TERM=xterm).

[skavanagh]

so I imagine MQL is printing different key codes for arrow keys than what is sent with the xterm and terms.js isn't handling those

I've seen this before with vi

http://vim.wikia.com/wiki/Fix_arrow_keys_that_display_A_B_C_D_on_remote_shell

on other programs as well

http://stackoverflow.com/questions/1911861/how-to-fix-the-sml-nj-interactive-system-to-use-arrow-keys

you could maybe try and install rlwrap

alias MQL=’rlwrap MQL’ (not sure if that's the command to get you to the MQL prompt).

Also, maybe you could setup MQL to use readline (I don't know anything about it)

[preetampatil3d]

I have simply assigned alternative shortcuts to these keys. For example Ctrl+p for up arrow key and so on.