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
|
/*
* 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.store.kafka;
import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableList;
import org.apache.calcite.plan.RelOptRuleCall;
import org.apache.calcite.plan.RelOptRuleOperand;
import org.apache.calcite.rex.RexNode;
import org.apache.drill.common.expression.LogicalExpression;
import org.apache.drill.exec.physical.base.GroupScan;
import org.apache.drill.exec.planner.logical.DrillOptiq;
import org.apache.drill.exec.planner.logical.DrillParseContext;
import org.apache.drill.exec.planner.logical.RelOptHelper;
import org.apache.drill.exec.planner.physical.FilterPrel;
import org.apache.drill.exec.planner.physical.PrelUtil;
import org.apache.drill.exec.planner.physical.ScanPrel;
import org.apache.drill.exec.store.StoragePluginOptimizerRule;
import java.util.List;
public class KafkaPushDownFilterIntoScan extends StoragePluginOptimizerRule {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(KafkaPushDownFilterIntoScan.class);
public static final StoragePluginOptimizerRule INSTANCE =
new KafkaPushDownFilterIntoScan(RelOptHelper.some(FilterPrel.class, RelOptHelper.any(ScanPrel.class)),
"KafkaPushFilterIntoScan:Filter_On_Scan");
private KafkaPushDownFilterIntoScan(RelOptRuleOperand operand, String description) {
super(operand, description);
}
@Override
public void onMatch(RelOptRuleCall call) {
final ScanPrel scan = call.rel(1);
final FilterPrel filter = call.rel(0);
final RexNode condition = filter.getCondition();
LogicalExpression conditionExp =
DrillOptiq.toDrill(new DrillParseContext(PrelUtil.getPlannerSettings(call.getPlanner())), scan, condition);
KafkaGroupScan groupScan = (KafkaGroupScan) scan.getGroupScan();
logger.info("Partitions ScanSpec before pushdown: " + groupScan.getPartitionScanSpecList());
KafkaPartitionScanSpecBuilder builder = new KafkaPartitionScanSpecBuilder(groupScan, conditionExp);
List<KafkaPartitionScanSpec> newScanSpec = null;
newScanSpec = builder.parseTree();
builder.close(); //Close consumer
//No pushdown
if(newScanSpec == null) {
return;
}
logger.info("Partitions ScanSpec after pushdown: " + newScanSpec);
GroupScan newGroupScan = groupScan.cloneWithNewSpec(newScanSpec);
final ScanPrel newScanPrel =
new ScanPrel(scan, filter.getTraitSet(), newGroupScan, scan.getRowType(), scan.getTable());
call.transformTo(filter.copy(filter.getTraitSet(), ImmutableList.of(newScanPrel)));
}
@Override
public boolean matches(RelOptRuleCall call) {
final ScanPrel scan = (ScanPrel) call.rel(1);
if (scan.getGroupScan() instanceof KafkaGroupScan) {
return super.matches(call);
}
return false;
}
}
|
