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Rong Rong
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[draft] add exchange removal rule
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‎pinot-query-planner/src/main/java/org/apache/calcite/rel/rules/PinotAggregateExchangeNodeRemoveRule.java‎

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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.apache.calcite.rel.rules;
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import com.google.common.collect.ImmutableList;
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import org.apache.calcite.plan.RelOptRule;
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import org.apache.calcite.plan.RelOptRuleCall;
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import org.apache.calcite.rel.RelNode;
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import org.apache.calcite.rel.core.Aggregate;
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import org.apache.calcite.rel.hint.PinotHintOptions;
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import org.apache.calcite.rel.hint.PinotHintStrategyTable;
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import org.apache.calcite.rel.hint.RelHint;
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import org.apache.calcite.rel.logical.LogicalAggregate;
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import org.apache.calcite.rel.logical.PinotLogicalExchange;
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import org.apache.calcite.tools.RelBuilderFactory;
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import org.apache.pinot.query.planner.plannode.AggregateNode;
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public class PinotAggregateExchangeNodeRemoveRule extends RelOptRule {
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public static final PinotAggregateExchangeNodeRemoveRule INSTANCE =
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new PinotAggregateExchangeNodeRemoveRule(PinotRuleUtils.PINOT_REL_FACTORY);
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public PinotAggregateExchangeNodeRemoveRule(RelBuilderFactory factory) {
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super(operand(PinotLogicalExchange.class,
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some(operand(LogicalAggregate.class, some(operand(PinotLogicalExchange.class, any()))))), factory, null);
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}
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@Override
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public boolean matches(RelOptRuleCall call) {
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if (call.rels.length < 1) {
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return false;
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}
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if (call.rel(1) instanceof Aggregate) {
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Aggregate agg = call.rel(1);
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ImmutableList<RelHint> hints = agg.getHints();
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return AggregateNode.AggType.LEAF.name().equals(
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PinotHintStrategyTable.getHintOption(hints, PinotHintOptions.INTERNAL_AGG_OPTIONS,
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PinotHintOptions.InternalAggregateOptions.AGG_TYPE));
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}
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return false;
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}
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@Override
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public void onMatch(RelOptRuleCall call) {
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final PinotLogicalExchange topExchange = call.rel(0);
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final Aggregate agg = (Aggregate) PinotRuleUtils.unboxRel(topExchange.getInput());
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final PinotLogicalExchange bottomExchange = (PinotLogicalExchange) PinotRuleUtils.unboxRel(agg.getInput());
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final RelNode input = PinotRuleUtils.unboxRel(bottomExchange.getInput());
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Aggregate newAgg =
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new LogicalAggregate(agg.getCluster(), agg.getTraitSet(), agg.getHints(), input, agg.getGroupSet(),
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agg.getGroupSets(), agg.getAggCallList());
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PinotLogicalExchange newExchange = PinotLogicalExchange.create(newAgg, topExchange.getDistribution());
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call.transformTo(newExchange);
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}
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}

‎pinot-query-planner/src/main/java/org/apache/calcite/rel/rules/PinotQueryRuleSets.java‎

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@@ -135,6 +135,8 @@ private PinotQueryRuleSets() {
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PinotSetOpExchangeNodeInsertRule.INSTANCE,
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// apply dynamic broadcast rule after exchange is inserted/
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PinotJoinToDynamicBroadcastRule.INSTANCE
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PinotJoinToDynamicBroadcastRule.INSTANCE,
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// apply exchange removal when possible.
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PinotAggregateExchangeNodeRemoveRule.INSTANCE
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);
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}

‎pinot-query-planner/src/test/resources/queries/PinotHintablePlans.json‎

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"\nLogicalAggregate(group=[{0}], agg#0=[$SUM0($1)])",
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"\n PinotLogicalExchange(distribution=[hash[0]])",
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"\n LogicalAggregate(group=[{1}], agg#0=[$SUM0($2)])",
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"\n PinotLogicalExchange(distribution=[hash[0]])",
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"\n LogicalJoin(condition=[=($0, $3)], joinType=[semi])",
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"\n LogicalProject(col1=[$0], col2=[$1], col3=[$2])",
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"\n LogicalTableScan(table=[[a]])",
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"\n PinotLogicalExchange(distribution=[broadcast], relExchangeType=[PIPELINE_BREAKER])",
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"\n LogicalProject(col2=[$1], col3=[$2])",
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"\n LogicalFilter(condition=[>($2, 0)])",
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"\n LogicalTableScan(table=[[b]])",
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"\n LogicalJoin(condition=[=($0, $3)], joinType=[semi])",
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"\n LogicalProject(col1=[$0], col2=[$1], col3=[$2])",
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"\n LogicalTableScan(table=[[a]])",
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"\n PinotLogicalExchange(distribution=[broadcast], relExchangeType=[PIPELINE_BREAKER])",
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"\n LogicalProject(col2=[$1], col3=[$2])",
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"\n LogicalFilter(condition=[>($2, 0)])",
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"\n LogicalTableScan(table=[[b]])",
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"\n"
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]
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},

‎pinot-query-runtime/src/test/resources/queries/QueryHints.json‎

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"sql": "SELECT /*+ joinOptions(join_strategy='dynamic_broadcast'), aggOptions(is_partitioned_by_group_by_keys='true') */ {tbl1}.num, COUNT({tbl1}.name) FROM {tbl1} /*+ tableOptions(partition_key='num', partition_size='4') */ WHERE {tbl1}.num IN (SELECT {tbl2}.num FROM {tbl2} /*+ tableOptions(partition_key='num', partition_size='4') */ WHERE {tbl2}.val IN ('xxx', 'yyy')) GROUP BY {tbl1}.num, {tbl1}.name"
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},
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{
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"ignored": true,
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"description": "Colocated, Dynamic broadcast SEMI-JOIN with partition column and group by non-partitioned column",
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"sql": "SELECT /*+ joinOptions(join_strategy='dynamic_broadcast') */ {tbl1}.name, COUNT(*) FROM {tbl1} /*+ tableOptions(partition_key='num', partition_size='4') */ WHERE {tbl1}.num IN (SELECT {tbl2}.num FROM {tbl2} /*+ tableOptions(partition_key='num', partition_size='4') */ WHERE {tbl2}.val IN ('xxx', 'yyy')) GROUP BY {tbl1}.name"
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},
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{
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"ignored": true,
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"description": "Dynamic broadcast SEMI-JOIN with empty right table result",
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"sql": "SELECT /*+ joinOptions(join_strategy='dynamic_broadcast') */ {tbl1}.name, COUNT(*) FROM {tbl1} /*+ tableOptions(partition_key='num', partition_size='4') */ WHERE {tbl1}.num IN (SELECT {tbl2}.num FROM {tbl2} /*+ tableOptions(partition_key='num', partition_size='4') */ WHERE {tbl2}.val = 'non-exist') GROUP BY {tbl1}.name"
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},
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{
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"ignored": true,
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"description": "Colocated, Dynamic broadcast SEMI-JOIN with partially empty right table result for some servers",
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"sql": "SELECT /*+ joinOptions(join_strategy='dynamic_broadcast') */ {tbl1}.name, COUNT(*) FROM {tbl1} /*+ tableOptions(partition_key='num', partition_size='4') */ WHERE {tbl1}.num IN (SELECT {tbl2}.num FROM {tbl2} /*+ tableOptions(partition_key='num', partition_size='4') */ WHERE {tbl2}.val = 'z') GROUP BY {tbl1}.name"
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},

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