Hyukjin Kwon created SPARK-61023:
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             Summary: Take the arguments of dropna, na.drop, fillna, describe, 
corr and approxQuantile in the Python client as PySpark does
                 Key: SPARK-61023
                 URL: https://issues.apache.org/jira/browse/SPARK-61023
             Project: Spark
          Issue Type: Bug
          Components: Connect
    Affects Versions: connect-rust-4.3.0
            Reporter: Hyukjin Kwon


In PySpark, the {{subset}} of {{df.dropna(how, thresh, subset)}} and 
{{df.na.drop}} is a column name or a list or tuple of them, and {{how}} is 
"any" or "all", else {{VALUE_NOT_ALLOWED}}. {{df.fillna(value, subset)}} takes 
a bool, a dict, a float, an int or a string as the value, else 
{{NOT_EXPECTED_TYPE}}. {{df.describe(*cols)}} takes column names or a list of 
them. {{df.corr(col1, col2, method)}} takes only the method "pearson", else 
{{VALUE_NOT_ALLOWED}}. {{df.approxQuantile(col, probabilities, relativeError)}} 
raises {{NEGATIVE_VALUE}} for a negative relativeError.

The Rust-backed Python client's {{df.dropna(subset="x")}} and 
{{df.na.drop(subset="x")}} raise {{TypeError: argument 'subset': Can't extract 
`str` to `Vec`}}. {{df.dropna(how="bogus")}} is accepted, {{df.fillna([1])}} 
fills the string 'List([Long(1)])', and {{df.describe(["x", "v"])}} raises a 
TypeError. {{df.corr("x", "v", "kendall")}} returns the Pearson correlation, 
and {{df.approxQuantile("v", [0.5], -1.0)}} fails on the server with an 
IllegalArgumentException. Take the arguments as PySpark does.




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