ca7a6cdff0
SQL in HiveContext, should be case insensitive, however, the following query will fail.
```scala
udf.register("random0", () => { Math.random()})
assert(sql("SELECT RANDOM0() FROM src LIMIT 1").head().getDouble(0) >= 0.0)
```
Author: Cheng Hao <hao.cheng@intel.com>
Closes #4326 from chenghao-intel/udf_case_sensitive and squashes the following commits:
485cf66 [Cheng Hao] Support the case insensitive for UDF
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| .. | ||
| compatibility/src/test/scala/org/apache/spark/sql/hive/execution | ||
| src | ||
| v0.12.0/src/main/scala/org/apache/spark/sql/hive | ||
| v0.13.1/src/main/scala/org/apache/spark/sql/hive | ||
| pom.xml | ||