Util.java
/*
* 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.sql.planner.assertions;
import com.facebook.presto.Session;
import com.facebook.presto.common.block.SortOrder;
import com.facebook.presto.common.predicate.Domain;
import com.facebook.presto.common.predicate.TupleDomain;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.spi.ColumnHandle;
import com.facebook.presto.spi.TableHandle;
import com.facebook.presto.spi.plan.OrderingScheme;
import com.facebook.presto.sql.planner.Symbol;
import com.facebook.presto.sql.planner.assertions.PlanMatchPattern.Ordering;
import com.google.common.collect.Maps;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import static com.google.common.collect.Iterators.getOnlyElement;
final class Util
{
private Util() {}
/**
* @param expectedDomains if empty, the actualConstraint's domains must also be empty.
*/
static boolean domainsMatch(
Optional<Map<String, Domain>> expectedDomains,
TupleDomain<ColumnHandle> actualConstraint,
TableHandle tableHandle,
Session session,
Metadata metadata)
{
Optional<Map<ColumnHandle, Domain>> actualDomains = actualConstraint.getDomains();
if (expectedDomains.isPresent() != actualDomains.isPresent()) {
return false;
}
if (!expectedDomains.isPresent()) {
return true;
}
Map<String, ColumnHandle> columnHandles = metadata.getColumnHandles(session, tableHandle);
for (Map.Entry<String, Domain> expectedColumnConstraint : expectedDomains.get().entrySet()) {
if (!columnHandles.containsKey(expectedColumnConstraint.getKey())) {
return false;
}
ColumnHandle columnHandle = columnHandles.get(expectedColumnConstraint.getKey());
if (!actualDomains.get().containsKey(columnHandle)) {
return false;
}
if (!expectedColumnConstraint.getValue().contains(actualDomains.get().get(columnHandle))) {
return false;
}
}
return true;
}
static boolean orderingSchemeMatches(List<Ordering> expectedOrderBy, OrderingScheme orderingScheme, SymbolAliases symbolAliases)
{
if (expectedOrderBy.size() != orderingScheme.getOrderByVariables().size()) {
return false;
}
for (int i = 0; i < expectedOrderBy.size(); ++i) {
Ordering ordering = expectedOrderBy.get(i);
Symbol symbol = Symbol.from(symbolAliases.get(ordering.getField()));
if (!symbol.equals(new Symbol(orderingScheme.getOrderByVariables().get(i).getName()))) {
return false;
}
SortOrder sortOrder = getOnlyElement(Maps.filterKeys(orderingScheme.getOrderingsMap(), variable -> variable.getName().equals(symbol.getName())).values().iterator());
if (!ordering.getSortOrder().equals(sortOrder)) {
return false;
}
}
return true;
}
}