crate/crate — pull request #1308 by mfussenegger (2014-10-29 17:09:45+00:00)
Title: correct alias handling.

we tried to resolve QualifiedNameReference by alias everywhere but that is
only valid in order by and group by.

this fixes:

select name as n, substr(n, 1, 1)
-> worked but shouldn't

select name as n, n as foo
-> both outputs where the value of "name"

select tags, tags[1]
-> tags[1] just used the value of tags ignoring the index access