Gian Merlino 9444da5038 SQL: Improved behavior when implicitly casting strings to date/time literals. (#5023)
* SQL: Improved behavior when implicitly casting strings to date/time literals.

- Handle all flavors of ISO8601 and SQL literals.
- Throw errors on other literals instead of silently transforming them to 0.

* Respect timeZone when format is null.
2017-11-10 17:43:22 +09:00
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