Package org.apache.flink.table.planner.plan.metadata
package org.apache.flink.table.planner.plan.metadata
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ClassDescriptionContains the interfaces for several specified metadata of flink.Metadata about the interval of given column from a specified relational expression.Handler API.Metadata about the null count of given column from a specified relational expression.Handler API.Origin null count, looking until source.Handler API.Metadata about the interval of given column under the given filter argument from a specified relational expression.Handler API.Metadata about how a relational expression is distributed.Handler API.Metadata about the modified property of a RelNode.Handler API.Metadata about the (minimum) unique groups of the given columns from a specified relational expression.Handler API.Metadata about which combinations of columns are upsert identifiers.Handler API.Metadata about the window properties of a RelNode.Handler API.FlinkRelMdCollation supplies a default implementation of
RelMetadataQuery.collations(org.apache.calcite.rel.RelNode)for the standard logical algebra.A RelMetadataQuery that defines extended metadata handler in Flink, e.g ColumnInterval, ColumnNullCount.