GitHub user petermaxlee opened a pull request:
https://github.com/apache/spark/pull/14362
[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 unit tests for SubstituteFunctionAliases as well as end-to-end tests
for SQLCompatibilityFunctionSuite.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/petermaxlee/spark SPARK-16730
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14362.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 #14362
----
commit 37b7127cdbf93334daa05dc5f48715b78966d032
Author: petermaxlee <petermax...@gmail.com>
Date: 2016-07-26T04:49:06Z
[SPARK-16730][SQL] Implement function aliases for type casts
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