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author | gatorsmile <gatorsmile@gmail.com> | 2015-11-17 11:23:54 -0800 |
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committer | Michael Armbrust <michael@databricks.com> | 2015-11-17 11:23:54 -0800 |
commit | 0158ff7737d10e68be2e289533241da96b496e89 (patch) | |
tree | e774350402b69a741d2ebcbbedfb57ef772a54cd /sql | |
parent | 7b1407c7b95c43299a30e891748824c4bc47e43b (diff) | |
download | spark-0158ff7737d10e68be2e289533241da96b496e89.tar.gz spark-0158ff7737d10e68be2e289533241da96b496e89.tar.bz2 spark-0158ff7737d10e68be2e289533241da96b496e89.zip |
[SPARK-8658][SQL][FOLLOW-UP] AttributeReference's equals method compares all the members
Based on the comment of cloud-fan in https://github.com/apache/spark/pull/9216, update the AttributeReference's hashCode function by including the hashCode of the other attributes including name, nullable and qualifiers.
Here, I am not 100% sure if we should include name in the hashCode calculation, since the original hashCode calculation does not include it.
marmbrus cloud-fan Please review if the changes are good.
Author: gatorsmile <gatorsmile@gmail.com>
Closes #9761 from gatorsmile/hashCodeNamedExpression.
Diffstat (limited to 'sql')
2 files changed, 9 insertions, 2 deletions
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala index e3daddace2..00b7970bd1 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala @@ -212,9 +212,12 @@ case class AttributeReference( override def hashCode: Int = { // See http://stackoverflow.com/questions/113511/hash-code-implementation var h = 17 - h = h * 37 + exprId.hashCode() + h = h * 37 + name.hashCode() h = h * 37 + dataType.hashCode() + h = h * 37 + nullable.hashCode() h = h * 37 + metadata.hashCode() + h = h * 37 + exprId.hashCode() + h = h * 37 + qualifiers.hashCode() h } diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala index 9de066e99d..a61297b2c0 100644 --- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala +++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala @@ -25,14 +25,18 @@ class SubexpressionEliminationSuite extends SparkFunSuite { val a: AttributeReference = AttributeReference("name", IntegerType)() val b1 = a.withName("name2").withExprId(id) val b2 = a.withExprId(id) + val b3 = a.withQualifiers("qualifierName" :: Nil) assert(b1 != b2) assert(a != b1) assert(b1.semanticEquals(b2)) assert(!b1.semanticEquals(a)) assert(a.hashCode != b1.hashCode) - assert(b1.hashCode == b2.hashCode) + assert(b1.hashCode != b2.hashCode) assert(b1.semanticHash() == b2.semanticHash()) + assert(a != b3) + assert(a.hashCode != b3.hashCode) + assert(a.semanticEquals(b3)) } test("Expression Equivalence - basic") { |