Hi, Broeder: There's a tricky situation: alias may be the same as column name. Some users often make mistakes in company that I worked, so I have to point out their problems.
If you want to support alias in the WHERE clause, I hope you can consider how to handle this situation. On Sat, 20 Aug 2022 at 07:31, Sean Broeder <s...@dremio.com> wrote: > > > > On Aug 19, 2022, at 3:57 PM, Sean Broeder <s...@dremio.com> wrote: > > > > Thanks for the clarification > > > >> On Aug 19, 2022, at 3:23 PM, Julian Hyde <jhyde.apa...@gmail.com > <mailto:jhyde.apa...@gmail.com>> wrote: > >> > >> Column aliases are only available in the ORDER BY clause. In some > dialect-compliance settings, they are also available in the GROUP BY and > HAVING clauses. But not in the WHERE clause. > > > Hi Julian, > It looks like some databases do support column aliasing in where clauses, > for example, Terradata documentation indicates it does. > > https://docs.teradata.com/r/Teradata-Database-SQL-Fundamentals/June-2017/Basic-SQL-Syntax/Referencing-Object-Names-in-a-Request/Using-a-Column-Alias > > I am interested in this feature and would contribute an enhancement to > Calcite if it’s possible. > > Do you happen to know if the current lack of support is due to technical > difficulties/limitations or it simply hasn’t been implemented yet? > > Also, if the latter, do you have a pointer to where I might start looking? > > Thanks, > Sen
