[SPARK-43967][PYTHON] Support regular Python UDTFs with empty return values#42044
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[SPARK-43967][PYTHON] Support regular Python UDTFs with empty return values#42044allisonwang-db wants to merge 1 commit into
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Jul 18, 2023
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Merged to master and branch-3.5. |
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### What changes were proposed in this pull request?
This PR adds support for regular (non-arrow-optimized) Python UDTFs that return empty results, for example:
```
def eval(self):
...
```
or
```
def eval(self):
yield
```
This feature is already available in arrow-optimized UDTFs.
### Why are the changes needed?
To align the behavior of regular Python UDTFs with arrow-optimized UDTFs.
### Does this PR introduce _any_ user-facing change?
Yes. After this PR, users can run regular Python UDTFs with empty return statement.
### How was this patch tested?
Existing UTs.
Closes #42044 from allisonwang-db/spark-43967-empty-return.
Authored-by: allisonwang-db <allison.wang@databricks.com>
Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>
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What changes were proposed in this pull request?
This PR adds support for regular (non-arrow-optimized) Python UDTFs that return empty results, for example:
or
This feature is already available in arrow-optimized UDTFs.
Why are the changes needed?
To align the behavior of regular Python UDTFs with arrow-optimized UDTFs.
Does this PR introduce any user-facing change?
Yes. After this PR, users can run regular Python UDTFs with empty return statement.
How was this patch tested?
Existing UTs.