JackieTien97 commented on code in PR #11859:
URL: https://github.com/apache/iotdb/pull/11859#discussion_r1502252914
##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/expression/visitor/predicate/ConvertPredicateToTimeFilterVisitor.java:
##########
@@ -88,17 +88,17 @@ private Expression rewriteInExpressionToEqual(InExpression
inExpression) {
@Override
public Filter visitIsNullExpression(IsNullExpression isNullExpression, Void
context) {
- throw new UnsupportedOperationException("TIMESTAMP does not support IS
NULL");
+ throw new UnsupportedOperationException("TIMESTAMP does not support IS
NULL/IS NOT NULL");
Review Comment:
combine with ConvertPredicateToFilterVisitor
##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/optimization/PredicatePushDown.java:
##########
@@ -0,0 +1,439 @@
+/*
+ * 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.iotdb.db.queryengine.plan.optimization;
+
+import org.apache.iotdb.commons.path.PartialPath;
+import org.apache.iotdb.db.queryengine.common.MPPQueryContext;
+import org.apache.iotdb.db.queryengine.common.QueryId;
+import org.apache.iotdb.db.queryengine.plan.analyze.Analysis;
+import org.apache.iotdb.db.queryengine.plan.analyze.ExpressionAnalyzer;
+import org.apache.iotdb.db.queryengine.plan.analyze.PredicateUtils;
+import org.apache.iotdb.db.queryengine.plan.analyze.TemplatedInfo;
+import org.apache.iotdb.db.queryengine.plan.expression.Expression;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeId;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanVisitor;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.FilterNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.MultiChildProcessNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.ProjectNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.SingleChildProcessNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.TransformNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.FullOuterTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.InnerTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.LeftOuterTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.AlignedSeriesScanNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanSourceNode;
+import org.apache.iotdb.db.queryengine.plan.statement.StatementType;
+import org.apache.iotdb.db.queryengine.plan.statement.component.Ordering;
+import org.apache.iotdb.db.queryengine.plan.statement.crud.QueryStatement;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkState;
+
+public class PredicatePushDown implements PlanOptimizer {
+
+ @Override
+ public PlanNode optimize(PlanNode plan, Analysis analysis, MPPQueryContext
context) {
+ if (analysis.getStatement().getType() != StatementType.QUERY) {
+ return plan;
+ }
+ QueryStatement queryStatement = (QueryStatement) analysis.getStatement();
+ if (queryStatement.isLastQuery() || !analysis.hasValueFilter()) {
+ return plan;
+ }
+ return plan.accept(
+ new Rewriter(),
+ new RewriterContext(
+ context.getQueryId(),
+ queryStatement.isAlignByDevice(),
+ analysis.isAllDevicesInOneTemplate(),
+ context.getTypeProvider().getTemplatedInfo()));
+ }
+
+ private static class Rewriter extends PlanVisitor<PlanNode, RewriterContext>
{
+
+ @Override
+ public PlanNode visitPlan(PlanNode node, RewriterContext context) {
+ throw new IllegalArgumentException("Unexpected plan node: " + node);
+ }
+
+ @Override
+ public PlanNode visitSingleChildProcess(SingleChildProcessNode node,
RewriterContext context) {
+ PlanNode rewrittenChild = node.getChild().accept(this, context);
+ node.setChild(rewrittenChild);
+ return node;
+ }
+
+ @Override
+ public PlanNode visitMultiChildProcess(MultiChildProcessNode node,
RewriterContext context) {
+ List<PlanNode> rewrittenChildren = new ArrayList<>();
+ for (PlanNode child : node.getChildren()) {
+ rewrittenChildren.add(child.accept(this, context));
+ }
+ node.setChildren(rewrittenChildren);
+ return node;
+ }
+
+ @Override
+ public PlanNode visitFilter(FilterNode node, RewriterContext context) {
+ if (fromHaving(node.getPredicate())) {
+ return visitSingleChildProcess(node, context);
+ }
+
+ context.setPushDownFilterNode(node);
+ PlanNode rewrittenChild = node.getChild().accept(this, context);
+
+ boolean enablePushDown = context.isEnablePushDown();
+ context.reset();
+
+ if (enablePushDown) {
+ return rewrittenChild;
+ }
+ return node;
+ }
+
+ private boolean fromHaving(Expression predicate) {
Review Comment:
use reference judgement
##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/PredicateUtils.java:
##########
@@ -365,4 +330,17 @@ private static void extractConjuncts(Expression predicate,
Set<Expression> conju
conjuncts.add(predicate);
}
}
+
+ public static boolean predicateCanPushDownToSource(
+ Expression predicate, PartialPath checkedSourcePath, boolean
isBuildPlanUseTemplate) {
+ return new PredicateCanPushDownToSourceChecker()
+ .process(
+ predicate,
+ new PredicateCanPushDownToSourceChecker.Context(
+ checkedSourcePath, isBuildPlanUseTemplate));
+ }
+
+ public static boolean predicateCanPushIntoScan(Expression predicate) {
Review Comment:
comment
##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/optimization/PredicatePushDown.java:
##########
@@ -0,0 +1,439 @@
+/*
+ * 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.iotdb.db.queryengine.plan.optimization;
+
+import org.apache.iotdb.commons.path.PartialPath;
+import org.apache.iotdb.db.queryengine.common.MPPQueryContext;
+import org.apache.iotdb.db.queryengine.common.QueryId;
+import org.apache.iotdb.db.queryengine.plan.analyze.Analysis;
+import org.apache.iotdb.db.queryengine.plan.analyze.ExpressionAnalyzer;
+import org.apache.iotdb.db.queryengine.plan.analyze.PredicateUtils;
+import org.apache.iotdb.db.queryengine.plan.analyze.TemplatedInfo;
+import org.apache.iotdb.db.queryengine.plan.expression.Expression;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeId;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanVisitor;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.FilterNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.MultiChildProcessNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.ProjectNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.SingleChildProcessNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.TransformNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.FullOuterTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.InnerTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.LeftOuterTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.AlignedSeriesScanNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanSourceNode;
+import org.apache.iotdb.db.queryengine.plan.statement.StatementType;
+import org.apache.iotdb.db.queryengine.plan.statement.component.Ordering;
+import org.apache.iotdb.db.queryengine.plan.statement.crud.QueryStatement;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkState;
+
+public class PredicatePushDown implements PlanOptimizer {
+
+ @Override
+ public PlanNode optimize(PlanNode plan, Analysis analysis, MPPQueryContext
context) {
+ if (analysis.getStatement().getType() != StatementType.QUERY) {
+ return plan;
+ }
+ QueryStatement queryStatement = (QueryStatement) analysis.getStatement();
+ if (queryStatement.isLastQuery() || !analysis.hasValueFilter()) {
+ return plan;
+ }
+ return plan.accept(
+ new Rewriter(),
+ new RewriterContext(
+ context.getQueryId(),
+ queryStatement.isAlignByDevice(),
+ analysis.isAllDevicesInOneTemplate(),
+ context.getTypeProvider().getTemplatedInfo()));
+ }
+
+ private static class Rewriter extends PlanVisitor<PlanNode, RewriterContext>
{
+
+ @Override
+ public PlanNode visitPlan(PlanNode node, RewriterContext context) {
+ throw new IllegalArgumentException("Unexpected plan node: " + node);
+ }
+
+ @Override
+ public PlanNode visitSingleChildProcess(SingleChildProcessNode node,
RewriterContext context) {
+ PlanNode rewrittenChild = node.getChild().accept(this, context);
+ node.setChild(rewrittenChild);
+ return node;
+ }
+
+ @Override
+ public PlanNode visitMultiChildProcess(MultiChildProcessNode node,
RewriterContext context) {
+ List<PlanNode> rewrittenChildren = new ArrayList<>();
+ for (PlanNode child : node.getChildren()) {
+ rewrittenChildren.add(child.accept(this, context));
+ }
+ node.setChildren(rewrittenChildren);
+ return node;
+ }
+
+ @Override
+ public PlanNode visitFilter(FilterNode node, RewriterContext context) {
+ if (fromHaving(node.getPredicate())) {
+ return visitSingleChildProcess(node, context);
+ }
+
+ context.setPushDownFilterNode(node);
+ PlanNode rewrittenChild = node.getChild().accept(this, context);
+
+ boolean enablePushDown = context.isEnablePushDown();
+ context.reset();
+
+ if (enablePushDown) {
+ return rewrittenChild;
+ }
+ return node;
+ }
+
+ private boolean fromHaving(Expression predicate) {
+ List<Expression> aggregations =
ExpressionAnalyzer.searchAggregationExpressions(predicate);
+ return aggregations != null && !aggregations.isEmpty();
+ }
+
+ @Override
+ public PlanNode visitFullOuterTimeJoin(FullOuterTimeJoinNode node,
RewriterContext context) {
+ if (context.hasNotInheritedPredicate()) {
+ return node;
+ }
+ if (context.isBuildPlanUseTemplate()) {
+ // only support push down to aligned scan
+ return node;
+ }
+
+ Expression inheritedPredicate = context.getInheritedPredicate();
+ List<Expression> conjuncts =
PredicateUtils.extractConjuncts(inheritedPredicate);
+
+ List<PlanNode> children = node.getChildren();
+
+ List<List<Expression>> pushDownConjunctsForEachChild = new
ArrayList<>(children.size());
Review Comment:
use Map<PartialPath, List<Expression>> to opt the time complexity to O(N+M)
##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/PredicateUtils.java:
##########
@@ -365,4 +330,17 @@ private static void extractConjuncts(Expression predicate,
Set<Expression> conju
conjuncts.add(predicate);
}
}
+
+ public static boolean predicateCanPushDownToSource(
Review Comment:
comment
##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/optimization/PredicatePushDown.java:
##########
@@ -0,0 +1,439 @@
+/*
+ * 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.iotdb.db.queryengine.plan.optimization;
+
+import org.apache.iotdb.commons.path.PartialPath;
+import org.apache.iotdb.db.queryengine.common.MPPQueryContext;
+import org.apache.iotdb.db.queryengine.common.QueryId;
+import org.apache.iotdb.db.queryengine.plan.analyze.Analysis;
+import org.apache.iotdb.db.queryengine.plan.analyze.ExpressionAnalyzer;
+import org.apache.iotdb.db.queryengine.plan.analyze.PredicateUtils;
+import org.apache.iotdb.db.queryengine.plan.analyze.TemplatedInfo;
+import org.apache.iotdb.db.queryengine.plan.expression.Expression;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNode;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeId;
+import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanVisitor;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.FilterNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.MultiChildProcessNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.ProjectNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.SingleChildProcessNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.TransformNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.FullOuterTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.InnerTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.process.join.LeftOuterTimeJoinNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.AlignedSeriesScanNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanNode;
+import
org.apache.iotdb.db.queryengine.plan.planner.plan.node.source.SeriesScanSourceNode;
+import org.apache.iotdb.db.queryengine.plan.statement.StatementType;
+import org.apache.iotdb.db.queryengine.plan.statement.component.Ordering;
+import org.apache.iotdb.db.queryengine.plan.statement.crud.QueryStatement;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkState;
+
+public class PredicatePushDown implements PlanOptimizer {
+
+ @Override
+ public PlanNode optimize(PlanNode plan, Analysis analysis, MPPQueryContext
context) {
+ if (analysis.getStatement().getType() != StatementType.QUERY) {
+ return plan;
+ }
+ QueryStatement queryStatement = (QueryStatement) analysis.getStatement();
+ if (queryStatement.isLastQuery() || !analysis.hasValueFilter()) {
+ return plan;
+ }
+ return plan.accept(
+ new Rewriter(),
+ new RewriterContext(
+ context.getQueryId(),
+ queryStatement.isAlignByDevice(),
+ analysis.isAllDevicesInOneTemplate(),
+ context.getTypeProvider().getTemplatedInfo()));
+ }
+
+ private static class Rewriter extends PlanVisitor<PlanNode, RewriterContext>
{
+
+ @Override
+ public PlanNode visitPlan(PlanNode node, RewriterContext context) {
+ throw new IllegalArgumentException("Unexpected plan node: " + node);
+ }
+
+ @Override
+ public PlanNode visitSingleChildProcess(SingleChildProcessNode node,
RewriterContext context) {
+ PlanNode rewrittenChild = node.getChild().accept(this, context);
+ node.setChild(rewrittenChild);
+ return node;
+ }
+
+ @Override
+ public PlanNode visitMultiChildProcess(MultiChildProcessNode node,
RewriterContext context) {
+ List<PlanNode> rewrittenChildren = new ArrayList<>();
+ for (PlanNode child : node.getChildren()) {
+ rewrittenChildren.add(child.accept(this, context));
+ }
+ node.setChildren(rewrittenChildren);
+ return node;
+ }
+
+ @Override
+ public PlanNode visitFilter(FilterNode node, RewriterContext context) {
+ if (fromHaving(node.getPredicate())) {
+ return visitSingleChildProcess(node, context);
+ }
+
+ context.setPushDownFilterNode(node);
+ PlanNode rewrittenChild = node.getChild().accept(this, context);
+
+ boolean enablePushDown = context.isEnablePushDown();
+ context.reset();
+
+ if (enablePushDown) {
+ return rewrittenChild;
+ }
+ return node;
+ }
+
+ private boolean fromHaving(Expression predicate) {
+ List<Expression> aggregations =
ExpressionAnalyzer.searchAggregationExpressions(predicate);
+ return aggregations != null && !aggregations.isEmpty();
+ }
+
+ @Override
+ public PlanNode visitFullOuterTimeJoin(FullOuterTimeJoinNode node,
RewriterContext context) {
+ if (context.hasNotInheritedPredicate()) {
+ return node;
+ }
+ if (context.isBuildPlanUseTemplate()) {
+ // only support push down to aligned scan
+ return node;
+ }
+
+ Expression inheritedPredicate = context.getInheritedPredicate();
+ List<Expression> conjuncts =
PredicateUtils.extractConjuncts(inheritedPredicate);
+
+ List<PlanNode> children = node.getChildren();
+
+ List<List<Expression>> pushDownConjunctsForEachChild = new
ArrayList<>(children.size());
+ // empty list for each child at first
+ for (int i = 0; i < children.size(); i++) {
+ pushDownConjunctsForEachChild.add(new ArrayList<>());
+ }
+
+ List<Expression> cannotPushDownConjuncts = new ArrayList<>();
+ extractPushDownConjunctsForEachChild(
+ conjuncts, children, pushDownConjunctsForEachChild,
cannotPushDownConjuncts, context);
+
+ if (cannotPushDownConjuncts.size() == conjuncts.size()) {
+ // all conjuncts cannot push down
+ return node;
+ }
+
+ context.setEnablePushDown(true);
+
+ List<PlanNode> childrenWithPredicate = new ArrayList<>();
+ List<PlanNode> childrenWithoutPredicate = new ArrayList<>();
+ for (int i = 0; i < children.size(); i++) {
+ SeriesScanSourceNode child = (SeriesScanSourceNode) children.get(i);
+ if (pushDownConjunctsForEachChild.get(i).isEmpty()) {
+ childrenWithoutPredicate.add(child);
+ } else {
+ child.setPushDownPredicate(
+
PredicateUtils.combineConjuncts(pushDownConjunctsForEachChild.get(i)));
+ childrenWithPredicate.add(child);
+ }
+ }
+
+ PlanNode left = planInnerTimeJoin(childrenWithPredicate,
node.getMergeOrder(), context);
+ PlanNode right =
+ planFullOuterTimeJoin(childrenWithoutPredicate,
node.getMergeOrder(), context);
+
+ PlanNode resultNode = planLeftOuterTimeJoin(left, right,
node.getMergeOrder(), context);
+
+ if (!cannotPushDownConjuncts.isEmpty()) {
+ resultNode =
+ planFilter(
+ resultNode,
PredicateUtils.combineConjuncts(cannotPushDownConjuncts), context);
+ } else {
+ resultNode = planTransform(resultNode, context);
+ resultNode = planProject(resultNode, context);
+ }
+ return resultNode;
+ }
+
+ private void extractPushDownConjunctsForEachChild(
+ List<Expression> conjuncts,
+ List<PlanNode> children,
+ List<List<Expression>> pushDownConjunctsForEachChild,
+ List<Expression> cannotPushDownConjuncts,
+ RewriterContext context) {
+ // find the source symbol for each child
+ List<PartialPath> sourcePathForEachChild = new
ArrayList<>(children.size());
+ for (PlanNode child : children) {
+ checkArgument(
+ child instanceof SeriesScanSourceNode, "Unexpected node type: " +
child.getClass());
+ sourcePathForEachChild.add(((SeriesScanSourceNode)
child).getPartitionPath());
+ }
+
+ // distinguish conjuncts that can push down and cannot push down
+ for (Expression conjunct : conjuncts) {
+ boolean canPushDown = false;
+ for (int i = 0; i < sourcePathForEachChild.size(); i++) {
+ if (PredicateUtils.predicateCanPushDownToSource(
+ conjunct, sourcePathForEachChild.get(i),
context.isBuildPlanUseTemplate())) {
+ pushDownConjunctsForEachChild.get(i).add(conjunct);
+ canPushDown = true;
+ break;
+ }
+ }
+ if (!canPushDown) {
+ cannotPushDownConjuncts.add(conjunct);
+ }
+ }
+ }
+
+ private PlanNode planInnerTimeJoin(
+ List<PlanNode> children, Ordering mergeOrder, RewriterContext context)
{
+ PlanNode resultNode = null;
+ if (children.size() == 1) {
+ resultNode = children.get(0);
+ } else if (children.size() > 1) {
+ resultNode = new InnerTimeJoinNode(context.genPlanNodeId(), children,
mergeOrder);
+ }
+ return resultNode;
+ }
+
+ private PlanNode planFullOuterTimeJoin(
+ List<PlanNode> children, Ordering mergeOrder, RewriterContext context)
{
+ PlanNode resultNode = null;
+ if (children.size() == 1) {
+ resultNode = children.get(0);
+ } else if (children.size() > 1) {
+ resultNode = new FullOuterTimeJoinNode(context.genPlanNodeId(),
mergeOrder, children);
+ }
+ return resultNode;
+ }
+
+ private PlanNode planLeftOuterTimeJoin(
+ PlanNode left, PlanNode right, Ordering mergeOrder, RewriterContext
context) {
+ checkState(left != null || right != null);
+ PlanNode resultNode;
+ if (left == null) {
+ resultNode = right;
+ } else if (right == null) {
+ resultNode = left;
+ } else {
+ resultNode = new LeftOuterTimeJoinNode(context.genPlanNodeId(),
mergeOrder, left, right);
+ }
+ return resultNode;
+ }
+
+ private PlanNode planFilter(PlanNode child, Expression predicate,
RewriterContext context) {
+ FilterNode pushDownFilterNode = context.getPushDownFilterNode();
+ return new FilterNode(
+ context.genPlanNodeId(),
+ child,
+ pushDownFilterNode.getOutputExpressions(),
+ predicate,
+ pushDownFilterNode.isKeepNull(),
+ pushDownFilterNode.getScanOrder());
+ }
+
+ @Override
+ public PlanNode visitAlignedSeriesScan(AlignedSeriesScanNode node,
RewriterContext context) {
+ if (context.hasNotInheritedPredicate()) {
+ return node;
+ }
+
+ if (!context.isBuildPlanUseTemplate()) {
+ return visitSeriesScanSource(node, context);
+ }
+ TemplatedInfo templatedInfo = context.getTemplatedInfo();
+ checkState(templatedInfo != null, "TemplatedInfo should not be null");
+
+ Expression inheritedPredicate = context.getInheritedPredicate();
+ if (context.enablePushDownUseTemplate()
+ || PredicateUtils.predicateCanPushDownToSource(
+ inheritedPredicate, node.getPartitionPath(),
context.isBuildPlanUseTemplate())) {
+ node.setPushDownPredicate(inheritedPredicate);
+ if (!templatedInfo.hasPushDownPredicate()) {
+ templatedInfo.setPushDownPredicate(inheritedPredicate);
+ }
+ context.setEnablePushDownUseTemplate(true);
+ context.setEnablePushDown(true);
+
+ return planProject(node, context);
+ }
+
+ // cannot push down
+ return node;
+ }
+
+ @Override
+ public PlanNode visitSeriesScan(SeriesScanNode node, RewriterContext
context) {
+ if (context.hasNotInheritedPredicate()) {
+ return node;
+ }
+ if (!context.isBuildPlanUseTemplate()) {
+ return visitSeriesScanSource(node, context);
+ }
+ // only support push down to aligned scan
+ return node;
+ }
+
+ @Override
+ public PlanNode visitSeriesScanSource(SeriesScanSourceNode node,
RewriterContext context) {
+ Expression inheritedPredicate = context.getInheritedPredicate();
+ if (PredicateUtils.predicateCanPushDownToSource(
+ inheritedPredicate, node.getPartitionPath(),
context.isBuildPlanUseTemplate())) {
+ node.setPushDownPredicate(inheritedPredicate);
+ context.setEnablePushDown(true);
+
+ PlanNode resultNode = planTransform(node, context);
+ resultNode = planProject(resultNode, context);
+ return resultNode;
+ }
+
+ // cannot push down
+ return node;
+ }
+
+ private PlanNode planTransform(PlanNode resultNode, RewriterContext
context) {
+ FilterNode pushDownFilterNode = context.getPushDownFilterNode();
+ Expression[] outputExpressions =
pushDownFilterNode.getOutputExpressions();
+ boolean needTransform = false;
+ for (Expression expression : outputExpressions) {
+ if (ExpressionAnalyzer.checkIsNeedTransform(expression)) {
+ needTransform = true;
+ break;
+ }
+ }
+
+ if (!needTransform) {
+ return resultNode;
+ }
+ return new TransformNode(
+ context.genPlanNodeId(),
+ resultNode,
+ outputExpressions,
+ pushDownFilterNode.isKeepNull(),
+ pushDownFilterNode.getScanOrder());
+ }
+
+ private PlanNode planProject(PlanNode resultNode, RewriterContext context)
{
Review Comment:
comment
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