(sql) Backslash should not escape in string

[schallm]

Remove backslash_escape with in strings in standard SQL

Closes #1748.

[joshgoebel]

Please add all 3 string types and examples of escapes to the expects test. And we need a changeling entry also. :)

Thanks!

[egor-rogov]

Hmm, strings in backticks are out of standard altogether. Anyone knows what database uses them?

[joshgoebel]

MySQL allows them for strings: https://stackoverflow.com/questions/11321491/when-to-use-single-quotes-double-quotes-and-backticks-in-mysql

[joshgoebel]

@egor-rogov Thoughts? If there is still a separate issue here might we keep this focused on the original issue and perhaps create a new issue for the backtick issue?

I think this solves the original issue, yes?

[egor-rogov]

@egor-rogov Thoughts? If there is still a separate issue here might we keep this focused on the original issue and perhaps create a new issue for the backtick issue? I think this solves the original issue, yes?

Absolutely.
As for backticks, looks like we cannot remove it until MySQL gets its own grammar, so let them be.