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Posted to issues@spark.apache.org by "Maciej Szymkiewicz (JIRA)" <ji...@apache.org> on 2017/02/01 17:55:51 UTC

[jira] [Created] (SPARK-19427) UserDefinedFunction should support data types strings

Maciej Szymkiewicz created SPARK-19427:
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             Summary: UserDefinedFunction should support data types strings
                 Key: SPARK-19427
                 URL: https://issues.apache.org/jira/browse/SPARK-19427
             Project: Spark
          Issue Type: Sub-task
          Components: PySpark, SQL
    Affects Versions: 2.1.0, 2.0.0
            Reporter: Maciej Szymkiewicz


PySpark SQL supports casting using data type strings. 

{code}
from pyspark.sql.functions import col

col("foo").cast("integer")
{code}

It should be possible to do the same with {{udf}} / {{UserDefinedFunction}}:

{code}
from pyspark.sql import udf

udf(lambda x: x + 1, "integer")
{code}



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