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PHOENIX-2198 Support correlate variable
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maryannxue
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Sep 9, 2015
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208 changes: 208 additions & 0 deletions
208
phoenix-core/src/main/java/org/apache/phoenix/execute/CorrelatePlan.java
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/* | ||
* 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.phoenix.execute; | ||
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import java.io.IOException; | ||
import java.sql.SQLException; | ||
import java.util.List; | ||
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import org.apache.hadoop.hbase.io.ImmutableBytesWritable; | ||
import org.apache.phoenix.compile.ExplainPlan; | ||
import org.apache.phoenix.compile.QueryPlan; | ||
import org.apache.phoenix.exception.SQLExceptionCode; | ||
import org.apache.phoenix.exception.SQLExceptionInfo; | ||
import org.apache.phoenix.execute.TupleProjector.ProjectedValueTuple; | ||
import org.apache.phoenix.iterate.DefaultParallelScanGrouper; | ||
import org.apache.phoenix.iterate.ParallelScanGrouper; | ||
import org.apache.phoenix.iterate.ResultIterator; | ||
import org.apache.phoenix.parse.JoinTableNode.JoinType; | ||
import org.apache.phoenix.schema.KeyValueSchema; | ||
import org.apache.phoenix.schema.PColumn; | ||
import org.apache.phoenix.schema.PTable; | ||
import org.apache.phoenix.schema.ValueBitSet; | ||
import org.apache.phoenix.schema.KeyValueSchema.KeyValueSchemaBuilder; | ||
import org.apache.phoenix.schema.tuple.Tuple; | ||
import org.apache.phoenix.util.SchemaUtil; | ||
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import com.google.common.collect.Lists; | ||
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public class CorrelatePlan extends DelegateQueryPlan { | ||
private final QueryPlan rhs; | ||
private final String variableId; | ||
private final JoinType joinType; | ||
private final boolean isSingleValueOnly; | ||
private final RuntimeContext runtimeContext; | ||
private final KeyValueSchema joinedSchema; | ||
private final KeyValueSchema lhsSchema; | ||
private final KeyValueSchema rhsSchema; | ||
private final int rhsFieldPosition; | ||
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public CorrelatePlan(QueryPlan lhs, QueryPlan rhs, String variableId, | ||
JoinType joinType, boolean isSingleValueOnly, | ||
RuntimeContext runtimeContext, PTable joinedTable, | ||
PTable lhsTable, PTable rhsTable, int rhsFieldPosition) { | ||
super(lhs); | ||
if (joinType != JoinType.Inner && joinType != JoinType.Left && joinType != JoinType.Semi && joinType != JoinType.Anti) | ||
throw new IllegalArgumentException("Unsupported join type '" + joinType + "' by CorrelatePlan"); | ||
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this.rhs = rhs; | ||
this.variableId = variableId; | ||
this.joinType = joinType; | ||
this.isSingleValueOnly = isSingleValueOnly; | ||
this.runtimeContext = runtimeContext; | ||
this.joinedSchema = buildSchema(joinedTable); | ||
this.lhsSchema = buildSchema(lhsTable); | ||
this.rhsSchema = buildSchema(rhsTable); | ||
this.rhsFieldPosition = rhsFieldPosition; | ||
} | ||
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private static KeyValueSchema buildSchema(PTable table) { | ||
KeyValueSchemaBuilder builder = new KeyValueSchemaBuilder(0); | ||
if (table != null) { | ||
for (PColumn column : table.getColumns()) { | ||
if (!SchemaUtil.isPKColumn(column)) { | ||
builder.addField(column); | ||
} | ||
} | ||
} | ||
return builder.build(); | ||
} | ||
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@Override | ||
public ExplainPlan getExplainPlan() throws SQLException { | ||
List<String> steps = Lists.newArrayList(); | ||
steps.add("NESTED-LOOP-JOIN (" + joinType.toString().toUpperCase() + ") TABLES"); | ||
for (String step : delegate.getExplainPlan().getPlanSteps()) { | ||
steps.add(" " + step); | ||
} | ||
steps.add("AND" + (rhsSchema.getFieldCount() == 0 ? " (SKIP MERGE)" : "")); | ||
for (String step : rhs.getExplainPlan().getPlanSteps()) { | ||
steps.add(" " + step); | ||
} | ||
return new ExplainPlan(steps); | ||
} | ||
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@Override | ||
public ResultIterator iterator() throws SQLException { | ||
return iterator(DefaultParallelScanGrouper.getInstance()); | ||
} | ||
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@Override | ||
public ResultIterator iterator(ParallelScanGrouper scanGrouper) | ||
throws SQLException { | ||
return new ResultIterator() { | ||
private final ValueBitSet destBitSet = ValueBitSet.newInstance(joinedSchema); | ||
private final ValueBitSet lhsBitSet = ValueBitSet.newInstance(lhsSchema); | ||
private final ValueBitSet rhsBitSet = | ||
(joinType == JoinType.Semi || joinType == JoinType.Anti) ? | ||
ValueBitSet.EMPTY_VALUE_BITSET | ||
: ValueBitSet.newInstance(rhsSchema); | ||
private final ResultIterator iter = delegate.iterator(); | ||
private ResultIterator rhsIter = null; | ||
private Tuple current = null; | ||
private boolean closed = false; | ||
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@Override | ||
public void close() throws SQLException { | ||
if (!closed) { | ||
closed = true; | ||
iter.close(); | ||
if (rhsIter != null) { | ||
rhsIter.close(); | ||
} | ||
} | ||
} | ||
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@Override | ||
public Tuple next() throws SQLException { | ||
if (closed) | ||
return null; | ||
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Tuple rhsCurrent = null; | ||
if (rhsIter != null) { | ||
rhsCurrent = rhsIter.next(); | ||
if (rhsCurrent == null) { | ||
rhsIter.close(); | ||
rhsIter = null; | ||
} else if (isSingleValueOnly) { | ||
throw new SQLExceptionInfo.Builder(SQLExceptionCode.SINGLE_ROW_SUBQUERY_RETURNS_MULTIPLE_ROWS).build().buildException(); | ||
} | ||
} | ||
while (rhsIter == null) { | ||
current = iter.next(); | ||
if (current == null) { | ||
close(); | ||
return null; | ||
} | ||
runtimeContext.setCorrelateVariableValue(variableId, current); | ||
rhsIter = rhs.iterator(); | ||
rhsCurrent = rhsIter.next(); | ||
if ((rhsCurrent == null && (joinType == JoinType.Inner || joinType == JoinType.Semi)) | ||
|| (rhsCurrent != null && joinType == JoinType.Anti)) { | ||
rhsIter.close(); | ||
rhsIter = null; | ||
} | ||
} | ||
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Tuple joined; | ||
try { | ||
joined = rhsBitSet == ValueBitSet.EMPTY_VALUE_BITSET ? | ||
current : TupleProjector.mergeProjectedValue( | ||
convertLhs(current), joinedSchema, destBitSet, | ||
rhsCurrent, rhsSchema, rhsBitSet, rhsFieldPosition); | ||
} catch (IOException e) { | ||
throw new SQLException(e); | ||
} | ||
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if ((joinType == JoinType.Semi || rhsCurrent == null) && rhsIter != null) { | ||
rhsIter.close(); | ||
rhsIter = null; | ||
} | ||
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return joined; | ||
} | ||
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@Override | ||
public void explain(List<String> planSteps) { | ||
} | ||
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private ProjectedValueTuple convertLhs(Tuple lhs) throws IOException { | ||
ProjectedValueTuple t; | ||
if (lhs instanceof ProjectedValueTuple) { | ||
t = (ProjectedValueTuple) lhs; | ||
} else { | ||
ImmutableBytesWritable ptr = getContext().getTempPtr(); | ||
TupleProjector.decodeProjectedValue(lhs, ptr); | ||
lhsBitSet.clear(); | ||
lhsBitSet.or(ptr); | ||
int bitSetLen = lhsBitSet.getEstimatedLength(); | ||
t = new ProjectedValueTuple(lhs, lhs.getValue(0).getTimestamp(), | ||
ptr.get(), ptr.getOffset(), ptr.getLength(), bitSetLen); | ||
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} | ||
return t; | ||
} | ||
}; | ||
} | ||
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@Override | ||
public Integer getLimit() { | ||
return null; | ||
} | ||
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} |
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33 changes: 33 additions & 0 deletions
33
phoenix-core/src/main/java/org/apache/phoenix/execute/RuntimeContext.java
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,33 @@ | ||
/* | ||
* 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.phoenix.execute; | ||
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import org.apache.phoenix.schema.TableRef; | ||
import org.apache.phoenix.schema.tuple.Tuple; | ||
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public interface RuntimeContext { | ||
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public abstract void defineCorrelateVariable(String variableId, TableRef def); | ||
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public abstract TableRef getCorrelateVariableDef(String variableId); | ||
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public abstract void setCorrelateVariableValue(String variableId, Tuple value); | ||
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public abstract Tuple getCorrelateVariableValue(String variableId); | ||
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} |
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