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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