Set initial number of tasks for scaled writer with HBO #20901
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| /* | ||
| * 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.cost; | ||
|
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| import com.fasterxml.jackson.annotation.JsonCreator; | ||
| import com.fasterxml.jackson.annotation.JsonProperty; | ||
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| import java.util.Objects; | ||
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| import static com.google.common.base.MoreObjects.toStringHelper; | ||
| import static java.lang.Double.NaN; | ||
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|
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| public class TableWriterNodeStatsEstimate | ||
| { | ||
| private static final TableWriterNodeStatsEstimate UNKNOWN = new TableWriterNodeStatsEstimate(NaN); | ||
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| private final double taskCountIfScaledWriter; | ||
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| @JsonCreator | ||
| public TableWriterNodeStatsEstimate(@JsonProperty("taskCountIfScaledWriter") double taskCountIfScaledWriter) | ||
| { | ||
| this.taskCountIfScaledWriter = taskCountIfScaledWriter; | ||
| } | ||
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| public static TableWriterNodeStatsEstimate unknown() | ||
| { | ||
| return UNKNOWN; | ||
| } | ||
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| @JsonProperty | ||
| public double getTaskCountIfScaledWriter() | ||
| { | ||
| return taskCountIfScaledWriter; | ||
| } | ||
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| @Override | ||
| public String toString() | ||
| { | ||
| return toStringHelper(this) | ||
| .add("taskCountIfScaledWriter", taskCountIfScaledWriter) | ||
| .toString(); | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) | ||
| { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| TableWriterNodeStatsEstimate that = (TableWriterNodeStatsEstimate) o; | ||
| return Double.compare(taskCountIfScaledWriter, that.taskCountIfScaledWriter) == 0; | ||
| } | ||
|
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| @Override | ||
| public int hashCode() | ||
| { | ||
| return Objects.hash(taskCountIfScaledWriter); | ||
| } | ||
| } |
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is TableWriterMergeNode relevant here?
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No, the scaled writer optimization is only related to table writer node, not related to table writer merger node.