GitHub user rednaxelafx opened a pull request:
https://github.com/apache/spark/pull/17777
[SPARK-20482][SQL] Resolving Casts is too strict on having time zone set
## What changes were proposed in this pull request?
Relax the requirement that a `TimeZoneAwareExpression` has to have its
`timeZoneId` set to be considered resolved.
With this change, a `Cast` (which is a `TimeZoneAwareExpression`) can be
considered resolved if the `(fromType, toType)` combination doesn't require
time zone information.
Also de-relaxed test cases in `CastSuite` so Casts in that test suite don't
get a default`timeZoneId = Option("GMT")`.
## How was this patch tested?
Ran the de-relaxed`CastSuite` and it's passing. Also ran the SQL unit tests
and they're passing too.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rednaxelafx/apache-spark
fix-catalyst-cast-timezone
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17777.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #17777
----
commit 8b21a41a7e423ea9ca2328991c98fd558647c30d
Author: Kris Mok <[email protected]>
Date: 2017-04-26T22:58:36Z
Relax the requirement that a TimeZoneAwareExpression has to have its
timeZoneId set to be considered resolved.
With this change, a Cast (which is a TimeZoneAwareExpression) can be
considered resolved if the (fromType, toType)
combination doesn't require time zone information.
Also de-relaxed test cases in CastSuite so Casts in that test suite don't
get a timeZoneId by default.
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