io.cdap.cdap.etl.api.join

Class JoinCondition.OnKeys.Builder

java.lang.Object

io.cdap.cdap.etl.api.join.JoinCondition.OnKeys.Builder

Enclosing class:

JoinCondition.OnKeys

public static class JoinCondition.OnKeys.Builder
extends Object

Builds an OnKeys condition.

Method Summary

Modifier and Type	Method and Description
JoinCondition.OnKeys.Builder	addKey(JoinKey key)
JoinCondition.OnKeys	build()
JoinCondition.OnKeys.Builder	setKeys(Collection<JoinKey> keys)
JoinCondition.OnKeys.Builder	setNullSafe(boolean nullSafe) Whether to perform null safe equality on the join keys.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

addKey

public JoinCondition.OnKeys.Builder addKey(JoinKey key)

setKeys

public JoinCondition.OnKeys.Builder setKeys(Collection<JoinKey> keys)

setNullSafe

public JoinCondition.OnKeys.Builder setNullSafe(boolean nullSafe)

Whether to perform null safe equality on the join keys. Null safe means a null value equals another null value. For example, when joining on A.id = B.id, if there are rows in both A and B with null ids, they will be joined together. When not performing a null-safe join, rows with null ids would not get joined. Note that the behavior of traditional SQL systems is *not* to perform null safe joins. T

build

public JoinCondition.OnKeys build()

Returns:

a join condition.

Throws:

InvalidJoinException - if the join condition is invalid