raghav5289 opened a new issue #9983:
URL: https://github.com/apache/incubator-superset/issues/9983
### Superset Version:
Superset: 0.30.0
Pydruid: 0.5.7
### Description:
I'm trying to use the an extractionfn with registeredLookup to create a
custom dimension.
```
{
"type": "extraction",
"dimension": "mt",
"outputName": "MediaType",
"outputType": "STRING",
"extractionFn": {
"type": "registeredLookup",
"optimize": true,
"lookup": "mt_lookup"
}
}
```
I can see the lookup working perfectly when I use it to in my charts, but
whenever I use it as part of a filter box, I get the `Exception: Unsupported
extraction function: registeredLookup`.
Following is the traceback:
```
Traceback (most recent call last):
File "/usr/local/lib/python3.6/dist-packages/superset/viz.py", line 415,
in get_df_payload
df = self.get_df(query_obj)
File "/usr/local/lib/python3.6/dist-packages/superset/viz.py", line 200,
in get_df
self.results = self.datasource.query(query_obj)
File
"/usr/local/lib/python3.6/dist-packages/superset/connectors/druid/models.py",
line 1356, in query
query_str = self.get_query_str(client=client, query_obj=query_obj,
phase=2)
File
"/usr/local/lib/python3.6/dist-packages/superset/connectors/druid/models.py",
line 958, in get_query_str
return self.run_query(client=client, phase=phase, **query_obj)
File
"/usr/local/lib/python3.6/dist-packages/superset/connectors/druid/models.py",
line 1183, in run_query
filters = DruidDatasource.get_filters(filter, self.num_cols,
columns_dict)
File
"/usr/local/lib/python3.6/dist-packages/superset/connectors/druid/models.py",
line 1446, in get_filters
(col, extraction_fn) = DruidDatasource._create_extraction_fn(dim_spec)
File
"/usr/local/lib/python3.6/dist-packages/superset/connectors/druid/models.py",
line 1422, in _create_extraction_fn
raise Exception(_("Unsupported extraction function: " + ext_type))
Exception: Unsupported extraction function: registeredLookup
```
A previous
[#5973](https://github.com/apache/incubator-superset/issues/5973), had a
similar problem but couldn't figure out the issue.
Any leads would be quite helpful !
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