org.apache.calcite.plan

Interface RelOptSchemaWithSampling

All Superinterfaces:

RelOptSchema

public interface RelOptSchemaWithSampling
extends RelOptSchema

Extension to RelOptSchema with support for sample data-sets.

See Also:

RelOptSchema

Method Summary

Modifier and Type	Method and Description
@Nullable RelOptTable	getTableForMember(List<String> names, @Nullable String datasetName, boolean[] usedDataset) Retrieves a RelOptTable based upon a member access, using a sample dataset if it exists.

Methods inherited from interface org.apache.calcite.plan.RelOptSchema

getTableForMember, getTypeFactory, registerRules

Method Detail

getTableForMember

@Nullable RelOptTable getTableForMember(List<String> names,
                                        @Nullable String datasetName,
                                        boolean[] usedDataset)

Retrieves a RelOptTable based upon a member access, using a sample dataset if it exists.

Parameters:

names - Compound name of table

datasetName - Name of sample dataset to substitute, if it exists; null to not look for a sample

usedDataset - Output parameter which is set to true if a sample dataset is found; may be null

Returns:

Table, or null if not found