MetadataHandler (Apache Calcite API)

Type Parameters:

M - Kind of metadata

All Known Subinterfaces:

BuiltInMetadata.AllPredicates.Handler, BuiltInMetadata.Collation.Handler, BuiltInMetadata.ColumnOrigin.Handler, BuiltInMetadata.ColumnUniqueness.Handler, BuiltInMetadata.CumulativeCost.Handler, BuiltInMetadata.DistinctRowCount.Handler, BuiltInMetadata.Distribution.Handler, BuiltInMetadata.ExplainVisibility.Handler, BuiltInMetadata.ExpressionLineage.Handler, BuiltInMetadata.MaxRowCount.Handler, BuiltInMetadata.Memory.Handler, BuiltInMetadata.MinRowCount.Handler, BuiltInMetadata.NodeTypes.Handler, BuiltInMetadata.NonCumulativeCost.Handler, BuiltInMetadata.Parallelism.Handler, BuiltInMetadata.PercentageOriginalRows.Handler, BuiltInMetadata.PopulationSize.Handler, BuiltInMetadata.Predicates.Handler, BuiltInMetadata.RowCount.Handler, BuiltInMetadata.Selectivity.Handler, BuiltInMetadata.Size.Handler, BuiltInMetadata.TableReferences.Handler, BuiltInMetadata.UniqueKeys.Handler

All Known Implementing Classes:

RelMdAllPredicates, RelMdCollation, RelMdColumnOrigins, RelMdColumnUniqueness, RelMdDistinctRowCount, RelMdDistribution, RelMdExplainVisibility, RelMdExpressionLineage, RelMdMaxRowCount, RelMdMemory, RelMdMinRowCount, RelMdNodeTypes, RelMdParallelism, RelMdPercentageOriginalRows, RelMdPopulationSize, RelMdPredicates, RelMdRowCount, RelMdSelectivity, RelMdSize, RelMdTableReferences, RelMdUniqueKeys
```
public interface MetadataHandler<M extends Metadata>
```
Marker interface for a handler of metadata.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  MetadataDef<M> getDef()

- Method Detail
  - getDef
```
MetadataDef<M> getDef()
```