[jira] [Created] (FLINK-20482) Support Map Operation in Python Table API

[Shang Yuanchun (Jira)]

Huang Xingbo created FLINK-20482:
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             Summary: Support Map Operation in Python Table API
                 Key: FLINK-20482
                 URL: https://issues.apache.org/jira/browse/FLINK-20482
             Project: Flink
          Issue Type: Sub-task
          Components: API / Python
            Reporter: Huang Xingbo
             Fix For: 1.13.0


Add Map Operation in Python Table API

The usage:
{code:java}
t = ...  # type: Table, table schema: [a: String, b: Int, c: Int]

# map General Python UDF
map_func = udf(lambda x: Row(x + 1, x * x),
          result_type=DataTypes.ROW([DataTypes.FIELD("a", DataTypes.INT()),
                                     DataTypes.FIELD("b", DataTypes.INT())]))
t.map(map_func(t.b)).alias("a", "b")

# map Pandas UDF
import pandas
pandas_map_func = udf(lambda x, y: pd.concat([x, y], axis=1),
                   result_type=DataTypes.ROW([DataTypes.FIELD("a",DataTypes.INT()),
                                          DataTypes.FIELD("b", DataTypes.INT())]))
t.map(pandas_map_func(b, c))

{code}



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