User-Defined Functions
Define a function
Create and apply UDF
Register UDF to use in SQL
Use Decorator Syntax (Python Only)
Use Vectorized UDF (Python Only)
Methods
UDF Registration (spark.udf): register
Built-In Functions : udf
package testScala
import testScala.Team
object printTest {
def test(spark: SparkSession): Unit = {
val teamArr = spark.SparkContext.parallelize(Range(1, 10))
val teamArr2 = teamArr.map(id => {
val team = new Team
team.setId(id)
team
})
t
问题背景:
在提交任务运行时,报了如下错误: Caused by: java.lang.BootstrapMethodError: call site initialization exception … Caused by: java.lang.invoke.LambdaConversionException: Invalid receiver type interface org.apache.http.Header; not a subtype of implementation ty