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91 changes: 91 additions & 0 deletions
91
...-main/src/main/java/io/prestosql/sql/planner/iterative/rule/ImplementOffsetOverOther.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* | ||
| * Licensed 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.prestosql.sql.planner.iterative.rule; | ||
|
|
||
| import com.google.common.collect.ImmutableList; | ||
| import io.prestosql.matching.Captures; | ||
| import io.prestosql.matching.Pattern; | ||
| import io.prestosql.sql.planner.Symbol; | ||
| import io.prestosql.sql.planner.iterative.Rule; | ||
| import io.prestosql.sql.planner.plan.Assignments; | ||
| import io.prestosql.sql.planner.plan.FilterNode; | ||
| import io.prestosql.sql.planner.plan.OffsetNode; | ||
| import io.prestosql.sql.planner.plan.ProjectNode; | ||
| import io.prestosql.sql.planner.plan.RowNumberNode; | ||
| import io.prestosql.sql.planner.plan.SortNode; | ||
| import io.prestosql.sql.planner.plan.TopNNode; | ||
| import io.prestosql.sql.tree.ComparisonExpression; | ||
| import io.prestosql.sql.tree.GenericLiteral; | ||
|
|
||
| import java.util.Optional; | ||
|
|
||
| import static io.prestosql.spi.type.BigintType.BIGINT; | ||
| import static io.prestosql.sql.planner.plan.Patterns.offset; | ||
| import static io.prestosql.sql.planner.plan.Patterns.source; | ||
|
|
||
| /** | ||
| * Transforms: | ||
| * <pre> | ||
| * - Offset (row count = x) | ||
| * - Source (other than Sort, TopN) | ||
| * </pre> | ||
| * Into: | ||
| * <pre> | ||
| * - Project (prune rowNumber symbol) | ||
| * - Filter (rowNumber > x) | ||
| * - RowNumber | ||
| * - Source | ||
| * </pre> | ||
| */ | ||
| public class ImplementOffsetOverOther | ||
| implements Rule<OffsetNode> | ||
| { | ||
| private static final Pattern<OffsetNode> PATTERN = offset() | ||
| .with(source().matching(node -> !(node instanceof TopNNode || node instanceof SortNode))); | ||
|
|
||
| @Override | ||
| public Pattern<OffsetNode> getPattern() | ||
| { | ||
| return PATTERN; | ||
| } | ||
|
|
||
| @Override | ||
| public Result apply(OffsetNode parent, Captures captures, Context context) | ||
| { | ||
| Symbol rowNumberSymbol = context.getSymbolAllocator().newSymbol("row_number", BIGINT); | ||
|
|
||
| RowNumberNode rowNumberNode = new RowNumberNode( | ||
| context.getIdAllocator().getNextId(), | ||
| parent.getSource(), | ||
| ImmutableList.of(), | ||
| rowNumberSymbol, | ||
| Optional.empty(), | ||
| Optional.empty()); | ||
|
|
||
| FilterNode filterNode = new FilterNode( | ||
| context.getIdAllocator().getNextId(), | ||
| rowNumberNode, | ||
| new ComparisonExpression( | ||
| ComparisonExpression.Operator.GREATER_THAN, | ||
| rowNumberSymbol.toSymbolReference(), | ||
| new GenericLiteral("BIGINT", Long.toString(parent.getCount())))); | ||
|
|
||
| ProjectNode projectNode = new ProjectNode( | ||
| context.getIdAllocator().getNextId(), | ||
| filterNode, | ||
| Assignments.identity(parent.getOutputSymbols())); | ||
|
|
||
| return Result.ofPlanNode(projectNode); | ||
| } | ||
| } |
109 changes: 109 additions & 0 deletions
109
...src/main/java/io/prestosql/sql/planner/iterative/rule/ImplementOffsetOverProjectSort.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| /* | ||
| * Licensed 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.prestosql.sql.planner.iterative.rule; | ||
|
|
||
| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import io.prestosql.matching.Capture; | ||
| import io.prestosql.matching.Captures; | ||
| import io.prestosql.matching.Pattern; | ||
| import io.prestosql.spi.block.SortOrder; | ||
| import io.prestosql.sql.planner.OrderingScheme; | ||
| import io.prestosql.sql.planner.Symbol; | ||
| import io.prestosql.sql.planner.iterative.Rule; | ||
| import io.prestosql.sql.planner.plan.FilterNode; | ||
| import io.prestosql.sql.planner.plan.OffsetNode; | ||
| import io.prestosql.sql.planner.plan.ProjectNode; | ||
| import io.prestosql.sql.planner.plan.RowNumberNode; | ||
| import io.prestosql.sql.planner.plan.SortNode; | ||
| import io.prestosql.sql.tree.ComparisonExpression; | ||
| import io.prestosql.sql.tree.GenericLiteral; | ||
|
|
||
| import java.util.Optional; | ||
|
|
||
| import static io.prestosql.matching.Capture.newCapture; | ||
| import static io.prestosql.spi.type.BigintType.BIGINT; | ||
| import static io.prestosql.sql.planner.plan.Patterns.offset; | ||
| import static io.prestosql.sql.planner.plan.Patterns.project; | ||
| import static io.prestosql.sql.planner.plan.Patterns.sort; | ||
| import static io.prestosql.sql.planner.plan.Patterns.source; | ||
|
|
||
| /** | ||
| * Transforms: | ||
| * <pre> | ||
| * - Offset (row count = x) | ||
| * - Project (prunes sort symbols no longer useful) | ||
| * - Sort (order by a, b, c) | ||
| * </pre> | ||
| * Into: | ||
| * <pre> | ||
| * - Project (prunes rowNumber symbol and sort symbols no longer useful) | ||
| * - Sort (order by rowNumber) | ||
| * - Filter (rowNumber > x) | ||
| * - RowNumber | ||
| * - Sort (order by a, b, c) | ||
| * </pre> | ||
| */ | ||
| public class ImplementOffsetOverProjectSort | ||
| implements Rule<OffsetNode> | ||
| { | ||
| private static final Capture<ProjectNode> PROJECT = newCapture(); | ||
| private static final Capture<SortNode> SORT = newCapture(); | ||
|
|
||
| private static final Pattern<OffsetNode> PATTERN = offset() | ||
| .with(source().matching( | ||
| project().capturedAs(PROJECT).matching(ProjectNode::isIdentity) | ||
| .with(source().matching( | ||
| sort().capturedAs(SORT))))); | ||
|
|
||
| @Override | ||
| public Pattern<OffsetNode> getPattern() | ||
| { | ||
| return PATTERN; | ||
| } | ||
|
|
||
| @Override | ||
| public Result apply(OffsetNode parent, Captures captures, Context context) | ||
| { | ||
| ProjectNode project = captures.get(PROJECT); | ||
| SortNode sort = captures.get(SORT); | ||
|
|
||
| Symbol rowNumberSymbol = context.getSymbolAllocator().newSymbol("row_number", BIGINT); | ||
|
|
||
| RowNumberNode rowNumberNode = new RowNumberNode( | ||
| context.getIdAllocator().getNextId(), | ||
| sort, | ||
| ImmutableList.of(), | ||
| rowNumberSymbol, | ||
| Optional.empty(), | ||
| Optional.empty()); | ||
|
|
||
| FilterNode filterNode = new FilterNode( | ||
| context.getIdAllocator().getNextId(), | ||
| rowNumberNode, | ||
| new ComparisonExpression( | ||
| ComparisonExpression.Operator.GREATER_THAN, | ||
| rowNumberSymbol.toSymbolReference(), | ||
| new GenericLiteral("BIGINT", Long.toString(parent.getCount())))); | ||
|
|
||
| SortNode sortNode = new SortNode( | ||
| context.getIdAllocator().getNextId(), | ||
| filterNode, | ||
| new OrderingScheme(ImmutableList.of(rowNumberSymbol), ImmutableMap.of(rowNumberSymbol, SortOrder.ASC_NULLS_FIRST))); | ||
|
|
||
| ProjectNode projectNode = (ProjectNode) project.replaceChildren(ImmutableList.of(sortNode)); | ||
|
|
||
| return Result.ofPlanNode(projectNode); | ||
| } | ||
| } |
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