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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.query.groupby;
import com.fasterxml.jackson.annotation.JsonProperty;
import io.druid.query.groupby.strategy.GroupByStrategySelector;
/**
*/
public class GroupByQueryConfig
{
public static final String CTX_KEY_STRATEGY = "groupByStrategy";
public static final String CTX_KEY_FORCE_LIMIT_PUSH_DOWN = "forceLimitPushDown";
public static final String CTX_KEY_APPLY_LIMIT_PUSH_DOWN = "applyLimitPushDown";
private static final String CTX_KEY_IS_SINGLE_THREADED = "groupByIsSingleThreaded";
private static final String CTX_KEY_MAX_INTERMEDIATE_ROWS = "maxIntermediateRows";
private static final String CTX_KEY_MAX_RESULTS = "maxResults";
private static final String CTX_KEY_BUFFER_GROUPER_INITIAL_BUCKETS = "bufferGrouperInitialBuckets";
private static final String CTX_KEY_BUFFER_GROUPER_MAX_LOAD_FACTOR = "bufferGrouperMaxLoadFactor";
private static final String CTX_KEY_BUFFER_GROUPER_MAX_SIZE = "bufferGrouperMaxSize";
private static final String CTX_KEY_MAX_ON_DISK_STORAGE = "maxOnDiskStorage";
private static final String CTX_KEY_MAX_MERGING_DICTIONARY_SIZE = "maxMergingDictionarySize";
private static final String CTX_KEY_FORCE_HASH_AGGREGATION = "forceHashAggregation";
@JsonProperty
private String defaultStrategy = GroupByStrategySelector.STRATEGY_V2;
@JsonProperty
private boolean singleThreaded = false;
@JsonProperty
private int maxIntermediateRows = 50000;
@JsonProperty
private int maxResults = 500000;
@JsonProperty
// Not documented, only used for tests to force spilling
private int bufferGrouperMaxSize = Integer.MAX_VALUE;
@JsonProperty
private float bufferGrouperMaxLoadFactor = 0;
@JsonProperty
private int bufferGrouperInitialBuckets = 0;
@JsonProperty
// Size of on-heap string dictionary for merging, per-query; when exceeded, partial results will be spilled to disk
private long maxMergingDictionarySize = 100_000_000L;
@JsonProperty
// Max on-disk temporary storage, per-query; when exceeded, the query fails
private long maxOnDiskStorage = 0L;
@JsonProperty
private boolean forcePushDownLimit = false;
@JsonProperty
private boolean forceHashAggregation = false;
public String getDefaultStrategy()
{
return defaultStrategy;
}
public boolean isSingleThreaded()
{
return singleThreaded;
}
public void setSingleThreaded(boolean singleThreaded)
{
this.singleThreaded = singleThreaded;
}
public int getMaxIntermediateRows()
{
return maxIntermediateRows;
}
public void setMaxIntermediateRows(int maxIntermediateRows)
{
this.maxIntermediateRows = maxIntermediateRows;
}
public int getMaxResults()
{
return maxResults;
}
public void setMaxResults(int maxResults)
{
this.maxResults = maxResults;
}
public int getBufferGrouperMaxSize()
{
return bufferGrouperMaxSize;
}
public float getBufferGrouperMaxLoadFactor()
{
return bufferGrouperMaxLoadFactor;
}
public int getBufferGrouperInitialBuckets()
{
return bufferGrouperInitialBuckets;
}
public long getMaxMergingDictionarySize()
{
return maxMergingDictionarySize;
}
public long getMaxOnDiskStorage()
{
return maxOnDiskStorage;
}
public boolean isForcePushDownLimit()
{
return forcePushDownLimit;
}
public boolean isForceHashAggregation()
{
return forceHashAggregation;
}
public GroupByQueryConfig withOverrides(final GroupByQuery query)
{
final GroupByQueryConfig newConfig = new GroupByQueryConfig();
newConfig.defaultStrategy = query.getContextValue(CTX_KEY_STRATEGY, getDefaultStrategy());
newConfig.singleThreaded = query.getContextBoolean(CTX_KEY_IS_SINGLE_THREADED, isSingleThreaded());
newConfig.maxIntermediateRows = Math.min(
query.getContextValue(CTX_KEY_MAX_INTERMEDIATE_ROWS, getMaxIntermediateRows()),
getMaxIntermediateRows()
);
newConfig.maxResults = Math.min(
query.getContextValue(CTX_KEY_MAX_RESULTS, getMaxResults()),
getMaxResults()
);
newConfig.bufferGrouperMaxSize = Math.min(
query.getContextValue(CTX_KEY_BUFFER_GROUPER_MAX_SIZE, getBufferGrouperMaxSize()),
getBufferGrouperMaxSize()
);
newConfig.bufferGrouperMaxLoadFactor = query.getContextValue(
CTX_KEY_BUFFER_GROUPER_MAX_LOAD_FACTOR,
getBufferGrouperMaxLoadFactor()
);
newConfig.bufferGrouperInitialBuckets = query.getContextValue(
CTX_KEY_BUFFER_GROUPER_INITIAL_BUCKETS,
getBufferGrouperInitialBuckets()
);
newConfig.maxOnDiskStorage = Math.min(
((Number) query.getContextValue(CTX_KEY_MAX_ON_DISK_STORAGE, getMaxOnDiskStorage())).longValue(),
getMaxOnDiskStorage()
);
newConfig.maxMergingDictionarySize = Math.min(
((Number) query.getContextValue(CTX_KEY_MAX_MERGING_DICTIONARY_SIZE, getMaxMergingDictionarySize())).longValue(),
getMaxMergingDictionarySize()
);
newConfig.forcePushDownLimit = query.getContextBoolean(CTX_KEY_FORCE_LIMIT_PUSH_DOWN, isForcePushDownLimit());
newConfig.forceHashAggregation = query.getContextBoolean(CTX_KEY_FORCE_HASH_AGGREGATION, isForceHashAggregation());
return newConfig;
}
@Override
public String toString()
{
return "GroupByQueryConfig{" +
"defaultStrategy='" + defaultStrategy + '\'' +
", singleThreaded=" + singleThreaded +
", maxIntermediateRows=" + maxIntermediateRows +
", maxResults=" + maxResults +
", bufferGrouperMaxSize=" + bufferGrouperMaxSize +
", bufferGrouperMaxLoadFactor=" + bufferGrouperMaxLoadFactor +
", bufferGrouperInitialBuckets=" + bufferGrouperInitialBuckets +
", maxMergingDictionarySize=" + maxMergingDictionarySize +
", maxOnDiskStorage=" + maxOnDiskStorage +
", forcePushDownLimit=" + forcePushDownLimit +
", forceHashAggregation=" + forceHashAggregation +
'}';
}
}