Kasta

Konvertera kolumnen till en annan datatyp.

Syntax

cast(dataType)

Parameters

Retur

Kolumn

Exempel

Cast med ett strängtypsnamn:

from pyspark.sql.types import StringType
df = spark.createDataFrame(
     [(2, "Alice"), (5, "Bob")], ["age", "name"])
df.select(df.age.cast("string").alias('ages')).collect()

# [Row(ages='2'), Row(ages='5')]

Cast med en DataType-instans:

from pyspark.sql.types import StringType
df = spark.createDataFrame(
     [(2, "Alice"), (5, "Bob")], ["age", "name"])
df.select(df.age.cast(StringType()).alias('ages')).collect()

# [Row(ages='2'), Row(ages='5')]