Sergey Bahchissaraitsev created SPARK-25314:
-----------------------------------------------

             Summary: Invalid PythonUDF - requires attributes from more than 
one child - in "on" join condition
                 Key: SPARK-25314
                 URL: https://issues.apache.org/jira/browse/SPARK-25314
             Project: Spark
          Issue Type: Bug
          Components: PySpark, SQL
    Affects Versions: 2.3.1
            Reporter: Sergey Bahchissaraitsev


This is another variation of the SPARK-19728 which was tagged as resolved. So I 
base the example on it:



from pyspark.sql.functions import udf
from pyspark.sql.types import BooleanType

df1 = sc.parallelize([(1, ), (2, )]).toDF(["col_a"])
df2 = sc.parallelize([(2, ), (3, )]).toDF(["col_b"])
pred = udf(lambda x, y: x == y, BooleanType())

df1.join(df2, pred(df1.col_a, df2.col_b)).show()


This throws:
{quote}java.lang.RuntimeException: Invalid PythonUDF <lambda>(col_a#132L, 
col_b#135L), requires attributes from more than one child.
at scala.sys.package$.error(package.scala:27)
 at 
org.apache.spark.sql.execution.python.ExtractPythonUDFs$$anonfun$org$apache$spark$sql$execution$python$ExtractPythonUDFs$$extract$2.apply(ExtractPythonUDFs.scala:182)
 at 
org.apache.spark.sql.execution.python.ExtractPythonUDFs$$anonfun$org$apache$spark$sql$execution$python$ExtractPythonUDFs$$extract$2.apply(ExtractPythonUDFs.scala:181)
 at scala.collection.immutable.Stream.foreach(Stream.scala:594)
 at 
org.apache.spark.sql.execution.python.ExtractPythonUDFs$.org$apache$spark$sql$execution$python$ExtractPythonUDFs$$extract(ExtractPythonUDFs.scala:181)
 at 
org.apache.spark.sql.execution.python.ExtractPythonUDFs$$anonfun$apply$2.applyOrElse(ExtractPythonUDFs.scala:118)
 at 
org.apache.spark.sql.execution.python.ExtractPythonUDFs$$anonfun$apply$2.applyOrElse(ExtractPythonUDFs.scala:114)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:289)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$transformUp$1.apply(TreeNode.scala:289)
 at 
org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:70)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:288)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:306)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187)
 at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:304)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:306)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187)
 at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:304)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:306)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187)
 at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:304)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:306)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187)
 at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:304)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:306)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187)
 at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:304)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:306)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187)
 at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:304)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:306)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187)
 at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:304)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$3.apply(TreeNode.scala:286)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode$$anonfun$4.apply(TreeNode.scala:306)
 at 
org.apache.spark.sql.catalyst.trees.TreeNode.mapProductIterator(TreeNode.scala:187)
 at org.apache.spark.sql.catalyst.trees.TreeNode.mapChildren(TreeNode.scala:304)
 at org.apache.spark.sql.catalyst.trees.TreeNode.transformUp(TreeNode.scala:286)
 at 
org.apache.spark.sql.execution.python.ExtractPythonUDFs$.apply(ExtractPythonUDFs.scala:114)
 at 
org.apache.spark.sql.execution.python.ExtractPythonUDFs$.apply(ExtractPythonUDFs.scala:94)
 at 
org.apache.spark.sql.execution.QueryExecution$$anonfun$prepareForExecution$1.apply(QueryExecution.scala:87)
 at 
org.apache.spark.sql.execution.QueryExecution$$anonfun$prepareForExecution$1.apply(QueryExecution.scala:87)
 at 
scala.collection.LinearSeqOptimized$class.foldLeft(LinearSeqOptimized.scala:124)
 at scala.collection.immutable.List.foldLeft(List.scala:84)
 at 
org.apache.spark.sql.execution.QueryExecution.prepareForExecution(QueryExecution.scala:87)
 at 
org.apache.spark.sql.execution.QueryExecution.executedPlan$lzycompute(QueryExecution.scala:77)
 at 
org.apache.spark.sql.execution.QueryExecution.executedPlan(QueryExecution.scala:77)
 at 
org.apache.spark.sql.execution.CacheManager$$anonfun$cacheQuery$1.apply(CacheManager.scala:100)
 at org.apache.spark.sql.execution.CacheManager.writeLock(CacheManager.scala:67)
 at 
org.apache.spark.sql.execution.CacheManager.cacheQuery(CacheManager.scala:91)
 at org.apache.spark.sql.Dataset.persist(Dataset.scala:2902)
 at org.apache.spark.sql.Dataset.cache(Dataset.scala:2912)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
 at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
 at py4j.Gateway.invoke(Gateway.java:282)
 at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
 at py4j.commands.CallCommand.execute(CallCommand.java:79)
 at py4j.GatewayConnection.run(GatewayConnection.java:238)
 at java.lang.Thread.run(Thread.java:748)



{quote}



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