Support Autocomplete for CTE tables

[EkkoG]

Description

For now, SQL Autocomplete works fine when select from a table in db

but when the table is a CTE, it will nothing at autocomplete options.

It test on the latest demo of Hue https://demo.gethue.com/hue/editor?editor=828642
With version 4.11.0 and db type is Hive.

[bjornalm]

Thanks @EkkoG for the suggestion. The CTE suport could indeed be improved. I'll open to see if we can get a community contribution for this improvement.