{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/32716916","id":32716916,"diff_hunk":"@@ -19,39 +19,193 @@ package org.apache.spark.sql.catalyst\n \n import org.apache.spark.sql.Row\n import org.apache.spark.sql.catalyst.expressions.GenericRow\n+import org.apache.spark.sql.types.StructType\n+import org.apache.spark.unsafe.types.UTF8String\n \n /**\n  * An abstract class for row used internal in Spark SQL, which only contain the columns as\n  * internal types.\n+ *\n+ * The following is a mapping between Spark SQL types and types of objects in row:\n+ *\n+ *   BooleanType -> java.lang.Boolean\n+ *   ByteType -> java.lang.Byte\n+ *   ShortType -> java.lang.Short\n+ *   IntegerType -> java.lang.Integer\n+ *   FloatType -> java.lang.Float\n+ *   DoubleType -> java.lang.Double\n+ *   StringType -> UTF8String\n+ *   DecimalType -> org.apache.spark.sql.types.Decimal\n+ *\n+ *   DateType -> java.lang.Int\n+ *   TimestampType -> java.lang.Long\n+ *\n+ *   BinaryType -> Array[Byte]\n+ *   ArrayType -> scala.collection.Seq\n+ *   MapType -> scala.collection.Map\n+ *   StructType -> InternalRow\n  */\n-abstract class InternalRow extends Row {\n-  // A default implementation to change the return type\n-  override def copy(): InternalRow = {this}\n-}\n+abstract class InternalRow extends Serializable {\n+  /** Number of elements in the Row. */\n+  def size: Int = length","path":"sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/InternalRow.scala","position":36,"original_position":36,"commit_id":"444382ea3a54b1b7f8066b155a2da64cc03775af","original_commit_id":"444382ea3a54b1b7f8066b155a2da64cc03775af","user":{"login":"cloud-fan","id":3182036,"avatar_url":"https://avatars.githubusercontent.com/u/3182036?v=3","gravatar_id":"","url":"https://api.github.com/users/cloud-fan","html_url":"https://github.com/cloud-fan","followers_url":"https://api.github.com/users/cloud-fan/followers","following_url":"https://api.github.com/users/cloud-fan/following{/other_user}","gists_url":"https://api.github.com/users/cloud-fan/gists{/gist_id}","starred_url":"https://api.github.com/users/cloud-fan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cloud-fan/subscriptions","organizations_url":"https://api.github.com/users/cloud-fan/orgs","repos_url":"https://api.github.com/users/cloud-fan/repos","events_url":"https://api.github.com/users/cloud-fan/events{/privacy}","received_events_url":"https://api.github.com/users/cloud-fan/received_events","type":"User","site_admin":false},"body":"agree. It's internal and we don't need to follow scala convention to provide `size`.","created_at":"2015-06-18T10:32:19Z","updated_at":"2015-06-18T10:32:19Z","html_url":"https://github.com/apache/spark/pull/6869#discussion_r32716916","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/6869","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/32716916"},"html":{"href":"https://github.com/apache/spark/pull/6869#discussion_r32716916"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/6869"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/6869","id":37973253,"html_url":"https://github.com/apache/spark/pull/6869","diff_url":"https://github.com/apache/spark/pull/6869.diff","patch_url":"https://github.com/apache/spark/pull/6869.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/6869","number":6869,"state":"open","locked":false,"title":"[WIP] remove expensive api from 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