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Heres, DanielAndrew Lamb
8dd6abbb72b
Heres, Daniel authored and Andrew Lamb committed 33c826eff58
ARROW-12048: [Rust][DataFusion] Support Common Table Expressions

This adds support for CTE syntax:

```sql
WITH
   name AS (SELECT ...)
   [, name2 AS (SELECT ...)]
SELECT ...
FROM ...
```

Before this PR, the CTE syntax was ignored.

This PR supports CTEs referening a previous CTE within the same query (but no forward references)

Closes #9776 from Dandandan/cte_support

Authored-by: Heres, Daniel <danielheres@gmail.com>
Signed-off-by: Andrew Lamb <andrew@nerdnetworks.org>