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feat: Rewrites pull query WHERE clause to be in DNF and allow more ex…
…pressions (#6874) * feat: More generic where clause and key extraction
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129 changes: 129 additions & 0 deletions
129
ksqldb-engine/src/main/java/io/confluent/ksql/planner/plan/KeyConstraint.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| /* | ||
| * Copyright 2020 Confluent Inc. | ||
| * | ||
| * Licensed under the Confluent Community License (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.confluent.io/confluent-community-license | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
| * WARRANTIES 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 io.confluent.ksql.planner.plan; | ||
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| import io.confluent.ksql.GenericKey; | ||
| import io.confluent.ksql.execution.streams.materialization.Locator.KsqlKey; | ||
| import io.confluent.ksql.planner.plan.PullFilterNode.WindowBounds; | ||
| import java.util.Objects; | ||
| import java.util.Optional; | ||
|
|
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| /** | ||
| * An instance of this class represents what we know about the use of keys in a given disjunct | ||
| * from an expression. The key's value, operator associated with it, and window bounds are | ||
| * available through the given methods. These are used as hints for the physical planning | ||
| * layer about how to fetch the corresponding rows. | ||
| */ | ||
| public class KeyConstraint implements LookupConstraint { | ||
|
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| private final ConstraintOperator operator; | ||
| private final GenericKey key; | ||
| private final Optional<WindowBounds> windowBounds; | ||
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| public KeyConstraint( | ||
| final ConstraintOperator operator, | ||
| final GenericKey key, | ||
| final Optional<WindowBounds> windowBounds | ||
| ) { | ||
| this.operator = operator; | ||
| this.key = key; | ||
| this.windowBounds = windowBounds; | ||
| } | ||
|
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| public static KeyConstraint equal( | ||
| final GenericKey key, | ||
| final Optional<WindowBounds> windowBounds | ||
| ) { | ||
| return new KeyConstraint(ConstraintOperator.EQUAL, key, windowBounds); | ||
| } | ||
|
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| // The key value. | ||
| public GenericKey getKey() { | ||
| return key; | ||
| } | ||
|
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| // The constraint operator associated with the value | ||
| public ConstraintOperator getConstraintOperator() { | ||
| return operator; | ||
| } | ||
|
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| // Window bounds, if the query is for a windowed table. | ||
| public Optional<WindowBounds> getWindowBounds() { | ||
| return windowBounds; | ||
| } | ||
|
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| public KeyConstraintKey getKsqlKey() { | ||
| return new KeyConstraintKey(key, windowBounds); | ||
| } | ||
|
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| // If the operator represents a range of keys | ||
| public boolean isRangeOperator() { | ||
| return operator != ConstraintOperator.EQUAL; | ||
| } | ||
|
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| public enum ConstraintOperator { | ||
| EQUAL, | ||
| LESS_THAN, | ||
| LESS_THAN_OR_EQUAL, | ||
| GREATER_THAN, | ||
| GREATER_THAN_OR_EQUAL | ||
| } | ||
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| public static class KeyConstraintKey implements KsqlKey { | ||
|
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| private final GenericKey key; | ||
| private final Optional<WindowBounds> windowBounds; | ||
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| public KeyConstraintKey(final GenericKey key, final Optional<WindowBounds> windowBounds) { | ||
| this.key = key; | ||
| this.windowBounds = windowBounds; | ||
| } | ||
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| @Override | ||
| public GenericKey getKey() { | ||
| return key; | ||
| } | ||
|
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| public Optional<WindowBounds> getWindowBounds() { | ||
| return windowBounds; | ||
| } | ||
|
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(key, windowBounds); | ||
| } | ||
|
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| @Override | ||
| public boolean equals(final Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
|
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| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
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| final KeyConstraintKey that = (KeyConstraintKey) o; | ||
| return Objects.equals(this.key, that.key) | ||
| && Objects.equals(this.windowBounds, that.windowBounds); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return key.toString() + "-" + windowBounds.toString(); | ||
| } | ||
| } | ||
| } |
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