cloud-fan commented on code in PR #47442:
URL: https://github.com/apache/spark/pull/47442#discussion_r1689236185
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sql/core/src/main/scala/org/apache/spark/sql/scripting/SqlScriptingExecutionNode.scala:
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@@ -155,3 +157,98 @@ abstract class
CompoundNestedStatementIteratorExec(collection: Seq[CompoundState
*/
class CompoundBodyExec(statements: Seq[CompoundStatementExec])
extends CompoundNestedStatementIteratorExec(statements)
+
+/**
+ * Executable node for IfElseStatement.
+ * @param conditions Collection of executable conditions. First condition
corresponds to IF clause,
+ * while others (if any) correspond to following ELSE IF
clauses.
+ * @param bodies Collection of executable bodies.
+ * @param booleanEvaluator Evaluator for Boolean conditions.
+ */
+class IfElseStatementExec(
+ conditions: Seq[SingleStatementExec],
+ bodies: Seq[CompoundBodyExec],
+ booleanEvaluator: StatementBooleanEvaluator) extends NonLeafStatementExec {
+ private object IfElseState extends Enumeration {
+ val Condition, Body = Value
+ }
+
+ private var state = IfElseState.Condition
+ private var curr: Option[CompoundStatementExec] = Some(conditions.head)
+
+ private var clauseIdx: Int = 0
+ private val conditionsCount: Int = conditions.length
+ private val bodiesCount: Int = bodies.length
+ assert(conditionsCount == bodiesCount || conditionsCount + 1 == bodiesCount)
+
+ private lazy val treeIterator: Iterator[CompoundStatementExec] =
Review Comment:
I mean from user's perspective within JDBC protocol. Should users be able to
see the if conditions as part of the result sets?
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