hi all, 多线程模式下执行sql ， 在非聚合sql时报了如下错误：
Caused by: java.lang.NullPointerException at java.util.Objects.requireNonNull(Objects.java:203) at org.apache.calcite.rel.metadata.RelMetadataQuery.<init>(RelMetadataQuery.java:141) at org.apache.calcite.rel.metadata.RelMetadataQuery.<init>(RelMetadataQuery.java:106) 已经用RelMetadataQueryBase.THREAD_PROVIDERS.set(JaninoRelMetadataProvider.of(FlinkDefaultRelMetadataProvider.INSTANCE())) 解决 但是执行聚合sql时 ， 仍然会报错， 请问有办法临时fix？ Caused by: java.lang.NullPointerException at scala.Predef$.Double2double(Predef.scala:365) at org.apache.flink.table.planner.plan.nodes.logical.FlinkLogicalAggregate.computeSelfCost(FlinkLogicalAggregate.scala:81) at org.apache.calcite.rel.metadata.RelMdPercentageOriginalRows.getNonCumulativeCost(RelMdPercentageOriginalRows.java:174) at GeneratedMetadataHandler_NonCumulativeCost.getNonCumulativeCost_$(Unknown Source) at GeneratedMetadataHandler_NonCumulativeCost.getNonCumulativeCost(Unknown Source) -- Best, Jun Su
