[WIP] Query plan pushdown #12375
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| /* | ||
| * 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.connector; | ||
|
|
||
| import com.facebook.presto.spi.connector.ConnectorOptimizationRule; | ||
| import com.facebook.presto.spi.connector.ConnectorRuleProvider; | ||
| import com.google.common.collect.ImmutableSet; | ||
|
|
||
| import java.util.Set; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.ConcurrentMap; | ||
|
|
||
| import static com.google.common.base.Preconditions.checkState; | ||
| import static java.util.Objects.requireNonNull; | ||
|
|
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| public class ConnectorOptimizationRuleManager | ||
| { | ||
| private final ConcurrentMap<ConnectorId, ConnectorRuleProvider> providers = new ConcurrentHashMap<>(); | ||
|
|
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|
|
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| public void addRuleProvider(ConnectorId connectorId, ConnectorRuleProvider ruleProvider) | ||
| { | ||
| requireNonNull(connectorId, "connectorId is null"); | ||
| requireNonNull(ruleProvider, "ruleProvider is null"); | ||
| checkState(providers.putIfAbsent(connectorId, ruleProvider) == null, "RuleProvider for connector '%s' is already registered", connectorId); | ||
| } | ||
|
|
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| public void removeRuleProvider(ConnectorId connectorId) | ||
| { | ||
| providers.remove(connectorId); | ||
| } | ||
|
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| public Set<ConnectorOptimizationRule> getRules(ConnectorId connectorId) | ||
| { | ||
| ConnectorRuleProvider provider = providers.get(connectorId); | ||
| if (provider == null) { | ||
| return ImmutableSet.of(); | ||
| } | ||
| return provider.getRules(); | ||
| } | ||
| } | ||
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One parameter a line