org.apache.flink.table.planner.plan.metadata

Interface FlinkMetadata.ColumnNullCount.Handler

All Superinterfaces:

org.apache.calcite.rel.metadata.MetadataHandler<FlinkMetadata.ColumnNullCount>

Enclosing interface:

FlinkMetadata.ColumnNullCount

public static interface FlinkMetadata.ColumnNullCount.Handler
extends org.apache.calcite.rel.metadata.MetadataHandler<FlinkMetadata.ColumnNullCount>

Handler API.

Method Summary

Modifier and Type	Method and Description
Double	getColumnNullCount(org.apache.calcite.rel.RelNode r, org.apache.calcite.rel.metadata.RelMetadataQuery mq, int index)

Methods inherited from interface org.apache.calcite.rel.metadata.MetadataHandler

getDef, handlerMethods

Method Detail

getColumnNullCount

Double getColumnNullCount(org.apache.calcite.rel.RelNode r,
                          org.apache.calcite.rel.metadata.RelMetadataQuery mq,
                          int index)