[SPARK-22945][SQL] add java UDF APIs in the functions object #20141
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cc @rxin @gatorsmile |
cloud-fan
commented
Jan 3, 2018
| val udf = UserDefinedFunction(func, dataType, inputTypes).withName(name) | ||
| if (nullable) udf else udf.asNonNullable() | ||
| }""") | ||
| |/** |
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just code style change, to use the multiline string format.
cloud-fan
commented
Jan 3, 2018
| * | ||
| * @since 1.3.0 | ||
| */ | ||
| @scala.annotation.varargs |
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to make it java friendly, or shall we create a new method for java?
cloud-fan
commented
Jan 3, 2018
| * function (UDF). The data types are automatically inferred based on the function's | ||
| * signature. To change a UDF to nondeterministic, call the API | ||
| * `UserDefinedFunction.asNondeterministic()`. | ||
| * Defines a Scala closure of 0 arguments as user-defined function (UDF). |
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to make the document consistent with UDFRegistration.register
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Test build #85629 has finished for PR 20141 at commit
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gatorsmile
reviewed
Jan 4, 2018
| /** | ||
| * Defines a Java UDF1 instance as user-defined function (UDF). | ||
| * The caller must specify the output data type, and there is no automatic input type coercion. | ||
| * By default the returned UDF is deterministic, to change it to nondeterministic, call the |
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LGTM |
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Test build #85658 has finished for PR 20141 at commit
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asfgit
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Jan 4, 2018
## What changes were proposed in this pull request?
Currently Scala users can use UDF like
```
val foo = udf((i: Int) => Math.random() + i).asNondeterministic
df.select(foo('a))
```
Python users can also do it with similar APIs. However Java users can't do it, we should add Java UDF APIs in the functions object.
## How was this patch tested?
new tests
Author: Wenchen Fan <[email protected]>
Closes #20141 from cloud-fan/udf.
(cherry picked from commit d5861ab)
Signed-off-by: Wenchen Fan <[email protected]>
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thanks, merging to master/2.3 |
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What changes were proposed in this pull request?
Currently Scala users can use UDF like
Python users can also do it with similar APIs. However Java users can't do it, we should add Java UDF APIs in the functions object.
How was this patch tested?
new tests