GitHub user petermaxlee opened a pull request:
https://github.com/apache/spark/pull/14364
[SPARK-16730][SQL] Implement function aliases for type casts
## What changes were proposed in this pull request?
Spark 1.x supports using the Hive type name as function names for doing
casts, e.g.
```sql
SELECT int(1.0);
SELECT string(2.0);
```
The above query would work in Spark 1.x because Spark 1.x fail back to Hive
for unimplemented functions, and break in Spark 2.0 because the fall back was
removed.
This patch implements function aliases using an analyzer rule for the
following cast functions:
- boolean
- tinyint
- smallint
- int
- bigint
- float
- double
- decimal
- date
- timestamp
- binary
- string
## How was this patch tested?
Added end-to-end tests in SQLCompatibilityFunctionSuite.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/petermaxlee/spark SPARK-16730-2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14364.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 #14364
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