[GitHub] [flink] lincoln-lil commented on a diff in pull request #23047: [FLINK-32646][table-planner] Fix TestTimeTravelCatalog missing snapshot version properties and add version to source table's digest

[via GitHub]

lincoln-lil commented on code in PR #23047:
URL: https://github.com/apache/flink/pull/23047#discussion_r1271293985


##########
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/planner/plan/nodes/physical/common/CommonPhysicalTableSourceScan.scala:
##########
@@ -51,9 +52,21 @@ abstract class CommonPhysicalTableSourceScan(
   }
 
   override def explainTerms(pw: RelWriter): RelWriter = {
+    val version = extractSnapshotVersion()
     super
       .explainTerms(pw)
       .item("fields", getRowType.getFieldNames.asScala.mkString(", "))
       .itemIf("hints", RelExplainUtil.hintsToString(getHints), 
!getHints.isEmpty)
+      .itemIf("version", version.get, version.isDefined)
+  }
+
+  private def extractSnapshotVersion(): Option[String] = {
+    val originTable: CatalogBaseTable =
+      relOptTable.contextResolvedTable.getTable.asInstanceOf[CatalogBaseTable]
+    originTable match {
+      case catalogTable: CatalogTable if catalogTable.getSnapshot.isPresent =>
+        Option(catalogTable.getSnapshot.get().toString)
+      case _ => Option("")

Review Comment:
   As a second thought, it would be safer to use 'getOrElse'



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