cloud-fan commented on a change in pull request #34581:
URL: https://github.com/apache/spark/pull/34581#discussion_r749106643
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
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@@ -890,6 +898,250 @@ case class SortMergeJoinExec(
""".stripMargin
}
+ /**
+ * Generates the code for Full Outer join.
+ */
+ private def codegenFullOuter(ctx: CodegenContext): String = {
+ // Inline mutable state since not many join operations in a task.
+ // Create class member for input iterator from both sides.
+ val leftInput = ctx.addMutableState("scala.collection.Iterator",
"leftInput",
+ v => s"$v = inputs[0];", forceInline = true)
+ val rightInput = ctx.addMutableState("scala.collection.Iterator",
"rightInput",
+ v => s"$v = inputs[1];", forceInline = true)
+
+ // Create class member for next input row from both sides.
+ val leftInputRow = ctx.addMutableState("InternalRow", "leftInputRow",
forceInline = true)
+ val rightInputRow = ctx.addMutableState("InternalRow", "rightInputRow",
forceInline = true)
+
+ // Create variables for join keys from both sides.
+ val leftKeyVars = createJoinKey(ctx, leftInputRow, leftKeys, left.output)
+ val leftAnyNull = leftKeyVars.map(_.isNull).mkString(" || ")
+ val rightKeyVars = createJoinKey(ctx, rightInputRow, rightKeys,
right.output)
+ val rightAnyNull = rightKeyVars.map(_.isNull).mkString(" || ")
+ val matchedKeyVars = copyKeys(ctx, leftKeyVars)
Review comment:
oh i see, it's matched, so left and right keys are the same.
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