SQL: WHERE clause doesn't utilise alias of SELECT expression/func successfully

[elasticmachine]

Original comment by @gingerwizard:

Query as follows:

SELECT respondent_id, applicant_income_000s/loan_amount_000s AS income_to_earnings_ratio FROM mortgages WHERE income_to_earnings_ratio > 1 ORDER BY income_to_earnings_ratio

The WHERE clauses here uses an alias. The query complains the income_to_earnings_ratio cannot be found i.e.

Found 1 problem(s)
line 1:101: Unknown column [income_to_earnings_ratio]

This is inconsistent with our ability to use aliases in GROUP BY and ORDER BY. Repeating the expression in the WHERE works.

[elasticmachine]

Original comment by @costin:

This feature is not availble because at runtime the SELECT (aka Projection) occurs after WHERE, meaning the alias definition isn't not defined yet it is being used.

GROUP BY and ORDER BY are somewhat different hence why we support them even though traditional SQL does not.
You are right that it is inconsistent however I'm not sure whether this can be enabled before alpha or ever.
In which case, do we want to disable the alias reference through-out or not?