1

In a file, I want to replace

COMMENT AS `<some_comment>`

with

COMMENT '<some_comment>'

That is, replace COMMENT AS with just COMMENT, and replace the backticks around the following comment - but without replacing backticks anywhere else. How would I do this, from the command line?

0

You could use sed, with careful quoting:

sed "s/^COMMENT AS \`\(.*\)\`$/COMMENT '\1'/"

Here I used double-quotes to surround the statement because of the internal single-quotes.

The back-ticks have to be escaped from the shell.

The parenthesis are escaped to make sed capture them (for later re-insertion with the \1 token).

I've also anchored the text to the beginning (^) and end ($) of line.

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