GitHub user wangyum opened a pull request:
https://github.com/apache/spark/pull/23199
[SPARK-26245][SQL] Add Float literal
## What changes were proposed in this pull request?
This PR adds parser support for `Float` literals.
Hive support this feature:

## How was this patch tested?
unit tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wangyum/spark SPARK-26245
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/23199.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 #23199
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commit 57faa4160365e4ec7ef9847861882b469d4953d6
Author: Yuming Wang <yumwang@...>
Date: 2018-12-02T08:56:56Z
Add Float literal
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