com.facebook.presto.jdbc.internal.spi.ConnectorTableLayout Maven / Gradle / Ivy
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.presto.jdbc.internal.spi;
import com.facebook.presto.jdbc.internal.common.predicate.TupleDomain;
import com.facebook.presto.jdbc.internal.spi.relation.RowExpression;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import static java.util.Collections.emptyList;
import static java.util.Objects.requireNonNull;
public class ConnectorTableLayout
{
private final ConnectorTableLayoutHandle handle;
private final Optional> columns;
private final TupleDomain predicate;
private final Optional tablePartitioning;
private final Optional> streamPartitioningColumns;
private final Optional discretePredicates;
private final List> localProperties;
private final Optional remainingPredicate;
public ConnectorTableLayout(ConnectorTableLayoutHandle handle)
{
this(handle,
Optional.empty(),
TupleDomain.all(),
Optional.empty(),
Optional.empty(),
Optional.empty(),
emptyList(),
Optional.empty());
}
public ConnectorTableLayout(
ConnectorTableLayoutHandle handle,
Optional> columns,
TupleDomain predicate,
Optional tablePartitioning,
Optional> streamPartitioningColumns,
Optional discretePredicates,
List> localProperties)
{
this(handle, columns, predicate, tablePartitioning, streamPartitioningColumns, discretePredicates, localProperties, Optional.empty());
}
public ConnectorTableLayout(
ConnectorTableLayoutHandle handle,
Optional> columns,
TupleDomain predicate,
Optional tablePartitioning,
Optional> streamPartitioningColumns,
Optional discretePredicates,
List> localProperties,
Optional remainingPredicate)
{
requireNonNull(handle, "handle is null");
requireNonNull(columns, "columns is null");
requireNonNull(streamPartitioningColumns, "partitioningColumns is null");
requireNonNull(tablePartitioning, "tablePartitioning is null");
requireNonNull(predicate, "predicate is null");
requireNonNull(discretePredicates, "discretePredicates is null");
requireNonNull(localProperties, "localProperties is null");
requireNonNull(remainingPredicate, "remainingPredicate is null");
this.handle = handle;
this.columns = columns;
this.tablePartitioning = tablePartitioning;
this.streamPartitioningColumns = streamPartitioningColumns;
this.predicate = predicate;
this.discretePredicates = discretePredicates;
this.localProperties = localProperties;
this.remainingPredicate = remainingPredicate;
}
public ConnectorTableLayoutHandle getHandle()
{
return handle;
}
/**
* The columns from the original table provided by this layout. A layout may provide only a subset of columns.
*/
public Optional> getColumns()
{
return columns;
}
/**
* A TupleDomain that represents a predicate that every row this TableScan node
* produces is guaranteed to satisfy.
*
* This guarantee can have different origins.
* For example, it may be successful predicate push down, or inherent guarantee provided by the underlying data.
*/
public TupleDomain getPredicate()
{
return predicate;
}
/**
* Returns the remaining predicates after the tuple domain push down in getTableLayout(). This doesn't have overlap with the {@code predicate} and {@code discretePredicates}.
* Note that if the predicate is fully pushed down to the connector, it may reference columns which are not in the output of the table scan if the columns are not used in the
* downstream plan.
*/
public Optional getRemainingPredicate()
{
return remainingPredicate;
}
/**
* The partitioning of the table across the worker nodes.
*
* If the table is node partitioned, the connector guarantees that each combination of values for
* the distributed columns will be contained within a single worker.
*/
public Optional getTablePartitioning()
{
return tablePartitioning;
}
/**
* The partitioning for the table streams.
* If empty, the table layout is partitioned arbitrarily.
* Otherwise, table steams are partitioned on the given set of columns (or unpartitioned, if the set is empty)
*
* If the table is partitioned, the connector guarantees that each combination of values for
* the partition columns will be contained within a single split (i.e., partitions cannot
* straddle multiple splits)
*/
public Optional> getStreamPartitioningColumns()
{
return streamPartitioningColumns;
}
/**
* A collection of discrete predicates describing the data in this layout. The union of
* these predicates is expected to be equivalent to the overall predicate returned
* by {@link #getPredicate()}. They may be used by the engine for further optimizations.
*/
public Optional getDiscretePredicates()
{
return discretePredicates;
}
/**
* Properties describing the layout of the data (grouping/sorting) within each partition
*/
public List> getLocalProperties()
{
return localProperties;
}
@Override
public int hashCode()
{
return Objects.hash(handle, columns, predicate, discretePredicates, streamPartitioningColumns, tablePartitioning, localProperties);
}
@Override
public boolean equals(Object obj)
{
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
ConnectorTableLayout other = (ConnectorTableLayout) obj;
return Objects.equals(this.handle, other.handle)
&& Objects.equals(this.columns, other.columns)
&& Objects.equals(this.predicate, other.predicate)
&& Objects.equals(this.discretePredicates, other.discretePredicates)
&& Objects.equals(this.streamPartitioningColumns, other.streamPartitioningColumns)
&& Objects.equals(this.tablePartitioning, other.tablePartitioning)
&& Objects.equals(this.localProperties, other.localProperties);
}
}