[FLINK-30817] ClassCastException in TestValuesTableFactory.TestValuesScanTableSourceWithoutProjectionPushDown

• Type: Bug
• Status: Open
• Priority: Not a Priority
• Resolution: Unresolved
• Affects Version/s: 1.16.0, 1.17.0
• Component/s: Table SQL / Planner
• Labels: auto-deprioritized-minor pull-request-available
• Assignee: Unassigned
• Reporter: Shuiqiang Chen
• Created: 29/Jan/23 08:43
• Updated: 18/Aug/23 22:35

Description

When applying partitions in TestValuesScanTableSourceWithoutProjectionPushDown with no partition provided, the following code will cause ClassCastException

 remainingPartitions = (List<Map<String, String>>) Collections.emptyMap();
 this.data.put(Collections.emptyMap(), Collections.emptyList());

java.lang.ClassCastException: java.util.Collections$EmptyMap cannot be cast to java.util.List

	at org.apache.flink.table.planner.factories.TestValuesTableFactory$TestValuesScanTableSourceWithoutProjectionPushDown.applyPartitions(TestValuesTableFactory.java:1222)
	at org.apache.flink.table.planner.plan.abilities.source.PartitionPushDownSpec.apply(PartitionPushDownSpec.java:57)
	at org.apache.flink.table.planner.plan.rules.logical.PushPartitionIntoTableSourceScanRule.onMatch(PushPartitionIntoTableSourceScanRule.java:183)
	at org.apache.calcite.plan.AbstractRelOptPlanner.fireRule(AbstractRelOptPlanner.java:343)

Issue Links

• links to: GitHub Pull Request #21878