1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 org.apache.drill.exec.planner.physical;
import java.util.List;
import org.apache.calcite.rel.RelCollations;
import org.apache.drill.exec.planner.logical.DrillJoinRel;
import org.apache.drill.exec.planner.logical.RelOptHelper;
import org.apache.calcite.rel.InvalidRelException;
import org.apache.calcite.rel.RelCollation;
import org.apache.calcite.rel.RelFieldCollation;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.plan.RelOptRule;
import org.apache.calcite.plan.RelOptRuleCall;
import org.apache.calcite.plan.RelOptRuleOperand;
import org.apache.calcite.util.trace.CalciteTrace;
import org.apache.drill.shaded.guava.com.google.common.collect.Lists;
import org.slf4j.Logger;
public class MergeJoinPrule extends JoinPruleBase {
public static final RelOptRule DIST_INSTANCE = new MergeJoinPrule("Prel.MergeJoinDistPrule", RelOptHelper.any(DrillJoinRel.class), true);
public static final RelOptRule BROADCAST_INSTANCE = new MergeJoinPrule("Prel.MergeJoinBroadcastPrule", RelOptHelper.any(DrillJoinRel.class), false);
protected static final Logger tracer = CalciteTrace.getPlannerTracer();
private final boolean isDist;
private MergeJoinPrule(String name, RelOptRuleOperand operand, boolean isDist) {
super(operand, name);
this.isDist = isDist;
}
@Override
public boolean matches(RelOptRuleCall call) {
return PrelUtil.getPlannerSettings(call.getPlanner()).isMergeJoinEnabled();
}
@Override
public void onMatch(RelOptRuleCall call) {
PlannerSettings settings = PrelUtil.getPlannerSettings(call.getPlanner());
final DrillJoinRel join = call.rel(0);
final RelNode left = join.getLeft();
final RelNode right = join.getRight();
if (!checkPreconditions(join, left, right, settings)) {
return;
}
boolean hashSingleKey = PrelUtil.getPlannerSettings(call.getPlanner()).isHashSingleKey();
try {
RelCollation collationLeft = getCollation(join.getLeftKeys());
RelCollation collationRight = getCollation(join.getRightKeys());
if(isDist){
createDistBothPlan(call, join, PhysicalJoinType.MERGE_JOIN, left, right, collationLeft, collationRight, hashSingleKey);
}else{
if (checkBroadcastConditions(call.getPlanner(), join, left, right)) {
createBroadcastPlan(call, join, join.getCondition(), PhysicalJoinType.MERGE_JOIN,
left, right, collationLeft, collationRight);
}
}
} catch (InvalidRelException e) {
tracer.warn(e.toString());
}
}
private RelCollation getCollation(List<Integer> keys) {
List<RelFieldCollation> fields = Lists.newArrayList();
for (int key : keys) {
fields.add(new RelFieldCollation(key));
}
return RelCollations.of(fields);
}
}
|
