[SPARK-45652][SQL] SPJ: Handle empty input partitions after dynamic f…

…iltering

### What changes were proposed in this pull request?

Handle the case when input partitions become empty after V2 dynamic filtering, when SPJ is enabled.

### Why are the changes needed?

Current in the situation when all input partitions are filtered out via dynamic filtering, SPJ doesn't work but instead will panic:
```
java.util.NoSuchElementException: None.get
	at scala.None$.get(Option.scala:529)
	at scala.None$.get(Option.scala:527)
	at org.apache.spark.sql.execution.datasources.v2.BatchScanExec.filteredPartitions$lzycompute(BatchScanExec.scala:108)
	at org.apache.spark.sql.execution.datasources.v2.BatchScanExec.filteredPartitions(BatchScanExec.scala:65)
	at org.apache.spark.sql.execution.datasources.v2.BatchScanExec.inputRDD$lzycompute(BatchScanExec.scala:136)
	at org.apache.spark.sql.execution.datasources.v2.BatchScanExec.inputRDD(BatchScanExec.scala:135)
	at org.apache.spark.sql.boson.BosonBatchScanExec.inputRDD$lzycompute(BosonBatchScanExec.scala:28)
```

This is because the `groupPartitions` method will return `None` in this scenario. We should handle the case.

### Does this PR introduce _any_ user-facing change?

No

### How was this patch tested?

Added a test case for this.

### Was this patch authored or co-authored using generative AI tooling?

No

Closes apache#43531 from sunchao/SPARK-45652.

Authored-by: Chao Sun <sunchao@apple.com>
Signed-off-by: Chao Sun <sunchao@apple.com>

sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/BatchScanExec.scala

@@ -100,7 +100,7 @@ case class BatchScanExec(
                 "partition values that are not present in the original partitioning.")
           }
 
-          groupPartitions(newPartitions).get.groupedParts.map(_.parts)
+          groupPartitions(newPartitions).map(_.groupedParts.map(_.parts)).getOrElse(Seq.empty)
 
         case _ =>
           // no validation is needed as the data source did not report any specific partitioning

sql/core/src/test/scala/org/apache/spark/sql/connector/KeyGroupedPartitioningSuite.scala

@@ -1477,4 +1477,46 @@ class KeyGroupedPartitioningSuite extends DistributionAndOrderingSuiteBase {
       }
     }
   }
+
+  test("SPARK-45652: SPJ should handle empty partition after dynamic filtering") {
+    withSQLConf(
+      SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "-1",
+      SQLConf.ADAPTIVE_EXECUTION_ENABLED.key -> "false",
+      SQLConf.DYNAMIC_PARTITION_PRUNING_ENABLED.key -> "true",
+      SQLConf.DYNAMIC_PARTITION_PRUNING_REUSE_BROADCAST_ONLY.key -> "false",
+      SQLConf.DYNAMIC_PARTITION_PRUNING_FALLBACK_FILTER_RATIO.key -> "10") {
+      val items_partitions = Array(identity("id"))
+      createTable(items, items_schema, items_partitions)
+      sql(s"INSERT INTO testcat.ns.$items VALUES " +
+          s"(1, 'aa', 40.0, cast('2020-01-01' as timestamp)), " +
+          s"(1, 'aa', 41.0, cast('2020-01-15' as timestamp)), " +
+          s"(2, 'bb', 10.0, cast('2020-01-01' as timestamp)), " +
+          s"(2, 'bb', 10.5, cast('2020-01-01' as timestamp)), " +
+          s"(3, 'cc', 15.5, cast('2020-02-01' as timestamp))")
+
+      val purchases_partitions = Array(identity("item_id"))
+      createTable(purchases, purchases_schema, purchases_partitions)
+      sql(s"INSERT INTO testcat.ns.$purchases VALUES " +
+          s"(1, 42.0, cast('2020-01-01' as timestamp)), " +
+          s"(1, 44.0, cast('2020-01-15' as timestamp)), " +
+          s"(1, 45.0, cast('2020-01-15' as timestamp)), " +
+          s"(2, 11.0, cast('2020-01-01' as timestamp)), " +
+          s"(3, 19.5, cast('2020-02-01' as timestamp))")
+
+      Seq(true, false).foreach { pushDownValues =>
+        Seq(true, false).foreach { partiallyClustered => {
+          withSQLConf(
+            SQLConf.V2_BUCKETING_PARTIALLY_CLUSTERED_DISTRIBUTION_ENABLED.key ->
+                partiallyClustered.toString,
+            SQLConf.V2_BUCKETING_PUSH_PART_VALUES_ENABLED.key -> pushDownValues.toString) {
+            // The dynamic filtering effectively filtered out all the partitions
+            val df = sql(s"SELECT p.price from testcat.ns.$items i, testcat.ns.$purchases p " +
+                "WHERE i.id = p.item_id AND i.price > 50.0")
+            checkAnswer(df, Seq.empty)
+          }
+        }
+        }
+      }
+    }
+  }
 }