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Resolves #860: Try planning an IN predicate as an OR of equalities.
If the planner detects that it can't implement an IN predicate using an in-join (for example, because of an incompatible sort order), it tries to rewrite it as an OR predicate instead. This attempt is controlled by a configuration object, which also includes the IndexScanPreference.
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91 changes: 91 additions & 0 deletions
91
...c/main/java/com/apple/foundationdb/record/query/plan/RecordQueryPlannerConfiguration.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* | ||
| * RecordQueryPlannerConfiguration.java | ||
| * | ||
| * This source file is part of the FoundationDB open source project | ||
| * | ||
| * Copyright 2015-2020 Apple Inc. and the FoundationDB project authors | ||
| * | ||
| * 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. | ||
| */ | ||
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| package com.apple.foundationdb.record.query.plan; | ||
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| import com.apple.foundationdb.annotation.API; | ||
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| import javax.annotation.Nonnull; | ||
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| /** | ||
| * A set of configuration options for the {@link RecordQueryPlanner}. | ||
| */ | ||
| @API(API.Status.MAINTAINED) | ||
| public class RecordQueryPlannerConfiguration { | ||
| @Nonnull | ||
| private final QueryPlanner.IndexScanPreference indexScanPreference; | ||
| private boolean attemptFailedInJoinAsOr; | ||
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| private RecordQueryPlannerConfiguration(@Nonnull QueryPlanner.IndexScanPreference indexScanPreference, | ||
| boolean attemptFailedInJoinAsOr) { | ||
| this.indexScanPreference = indexScanPreference; | ||
| this.attemptFailedInJoinAsOr = attemptFailedInJoinAsOr; | ||
| } | ||
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| @Nonnull | ||
| public QueryPlanner.IndexScanPreference getIndexScanPreference() { | ||
| return indexScanPreference; | ||
| } | ||
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| public boolean shouldAttemptFailedInJoinAsOr() { | ||
| return attemptFailedInJoinAsOr; | ||
| } | ||
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| @Nonnull | ||
| public Builder asBuilder() { | ||
| return new Builder(this); | ||
| } | ||
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| @Nonnull | ||
| public static Builder builder() { | ||
| return new Builder(); | ||
| } | ||
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| /** | ||
| * A builder for {@link RecordQueryPlannerConfiguration}. | ||
| */ | ||
| public static class Builder { | ||
| @Nonnull | ||
| private QueryPlanner.IndexScanPreference indexScanPreference = QueryPlanner.IndexScanPreference.PREFER_SCAN; | ||
| private boolean attemptFailedInJoinAsOr = false; | ||
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| public Builder(@Nonnull RecordQueryPlannerConfiguration configuration) { | ||
| this.indexScanPreference = configuration.indexScanPreference; | ||
| this.attemptFailedInJoinAsOr = configuration.attemptFailedInJoinAsOr; | ||
| } | ||
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| public Builder() { | ||
| } | ||
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| public Builder setIndexScanPreference(@Nonnull QueryPlanner.IndexScanPreference indexScanPreference) { | ||
| this.indexScanPreference = indexScanPreference; | ||
| return this; | ||
| } | ||
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| public Builder setAttemptFailedInJoinAsOr(boolean attemptFailedInJoinAsOr) { | ||
| this.attemptFailedInJoinAsOr = attemptFailedInJoinAsOr; | ||
| return this; | ||
| } | ||
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| public RecordQueryPlannerConfiguration build() { | ||
| return new RecordQueryPlannerConfiguration(indexScanPreference, attemptFailedInJoinAsOr); | ||
| } | ||
| } | ||
| } |
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