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| author | Xiao Li <gatorsmile@gmail.com> | 2017-04-17 09:50:20 -0700 |
|---|---|---|
| committer | Xiao Li <gatorsmile@gmail.com> | 2017-04-17 09:50:20 -0700 |
| commit | 01ff0350a85b179715946c3bd4f003db7c5e3641 (patch) | |
| tree | 8c4a43ff6d217c1b4587c7b9d06afa0e7fa9b44a /sql/catalyst/src/test/scala/org/apache | |
| parent | 24f09b39c7b947e52fda952676d5114c2540e732 (diff) | |
| download | spark-01ff0350a85b179715946c3bd4f003db7c5e3641.tar.gz spark-01ff0350a85b179715946c3bd4f003db7c5e3641.tar.bz2 spark-01ff0350a85b179715946c3bd4f003db7c5e3641.zip | |
[SPARK-20349][SQL] ListFunctions returns duplicate functions after using persistent functions
### What changes were proposed in this pull request?
The session catalog caches some persistent functions in the `FunctionRegistry`, so there can be duplicates. Our Catalog API `listFunctions` does not handle it.
It would be better if `SessionCatalog` API can de-duplciate the records, instead of doing it by each API caller. In `FunctionRegistry`, our functions are identified by the unquoted string. Thus, this PR is try to parse it using our parser interface and then de-duplicate the names.
### How was this patch tested?
Added test cases.
Author: Xiao Li <gatorsmile@gmail.com>
Closes #17646 from gatorsmile/showFunctions.
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