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152
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/CancelCommand.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.doris.nereids.trees.plans.commands; | ||
|
|
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| import org.apache.doris.analysis.Expr; | ||
| import org.apache.doris.common.AnalysisException; | ||
| import org.apache.doris.nereids.CascadesContext; | ||
| import org.apache.doris.nereids.analyzer.UnboundSlot; | ||
| import org.apache.doris.nereids.glue.translator.ExpressionTranslator; | ||
| import org.apache.doris.nereids.glue.translator.PlanTranslatorContext; | ||
| import org.apache.doris.nereids.properties.PhysicalProperties; | ||
| import org.apache.doris.nereids.trees.expressions.BinaryOperator; | ||
| import org.apache.doris.nereids.trees.expressions.CompoundPredicate; | ||
| import org.apache.doris.nereids.trees.expressions.Expression; | ||
| import org.apache.doris.nereids.trees.expressions.Like; | ||
| import org.apache.doris.nereids.trees.expressions.Not; | ||
| import org.apache.doris.nereids.trees.expressions.literal.StringLikeLiteral; | ||
| import org.apache.doris.nereids.trees.plans.PlanType; | ||
| import org.apache.doris.nereids.trees.plans.logical.LogicalEmptyRelation; | ||
| import org.apache.doris.nereids.trees.plans.visitor.PlanVisitor; | ||
| import org.apache.doris.qe.ConnectContext; | ||
| import org.apache.doris.qe.StmtExecutor; | ||
|
|
||
| import com.google.common.base.Strings; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.Map; | ||
|
|
||
| /** | ||
| * cancel load command | ||
| */ | ||
| public abstract class CancelCommand extends Command implements ForwardWithSync { | ||
| public CancelCommand(PlanType type) { | ||
| super(type); | ||
| } | ||
|
|
||
| @Override | ||
| public void run(ConnectContext ctx, StmtExecutor executor) throws Exception { | ||
|
|
||
| } | ||
|
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| @Override | ||
| public <R, C> R accept(PlanVisitor<R, C> visitor, C context) { | ||
| return null; | ||
| } | ||
|
|
||
| /** | ||
| * translate to legacy expr, which do not need complex expression and table columns | ||
| */ | ||
| public Expr translateToLegacyExpr(ConnectContext ctx, Expression expression) { | ||
| LogicalEmptyRelation plan = new LogicalEmptyRelation( | ||
| ConnectContext.get().getStatementContext().getNextRelationId(), | ||
| new ArrayList<>()); | ||
| CascadesContext cascadesContext = CascadesContext.initContext(ctx.getStatementContext(), plan, | ||
| PhysicalProperties.ANY); | ||
| PlanTranslatorContext planTranslatorContext = new PlanTranslatorContext(cascadesContext); | ||
| return ExpressionTranslator.translate(expression, planTranslatorContext); | ||
| } | ||
|
|
||
| /** | ||
| * check where filter for cancel load/export commands | ||
| * @param expression where clause | ||
| * @param supportedColumns only these kind of columns is supported | ||
| * @throws AnalysisException analyze exceptions | ||
| */ | ||
| public void checkWhereFilter(Expression expression, Map<String, String> supportedColumns) throws AnalysisException { | ||
| if (null == expression) { | ||
| throw new AnalysisException("Where clause can't be null"); | ||
| } else if (expression instanceof Like) { | ||
| likeCheck(expression, supportedColumns); | ||
| } else if (expression instanceof BinaryOperator) { | ||
| binaryCheck(expression, supportedColumns); | ||
| } else if (expression instanceof CompoundPredicate) { | ||
| compoundCheck(expression, supportedColumns); | ||
| } else { | ||
| throw new AnalysisException("Only support like/binary/compound predicate"); | ||
| } | ||
| } | ||
|
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| private void checkColumn(Expression expr, boolean like, Map<String, String> supportedColumns) | ||
| throws AnalysisException { | ||
| if (!(expr.child(0) instanceof UnboundSlot)) { | ||
| throw new AnalysisException("Current only support label and state, invalid column: " | ||
| + expr.child(0).toSql()); | ||
| } | ||
| String inputCol = ((UnboundSlot) expr.child(0)).getName(); | ||
| if (!supportedColumns.keySet().contains(inputCol.toLowerCase())) { | ||
| throw new AnalysisException("Current only support label and state, invalid column: " + inputCol); | ||
| } | ||
| if (!(expr.child(1) instanceof StringLikeLiteral)) { | ||
| throw new AnalysisException("Value must be a string"); | ||
| } | ||
|
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| String inputValue = ((StringLikeLiteral) expr.child(1)).getStringValue(); | ||
| if (Strings.isNullOrEmpty(inputValue)) { | ||
| throw new AnalysisException("Value can't be null"); | ||
| } | ||
|
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| if (inputCol.equalsIgnoreCase("label")) { | ||
| supportedColumns.put("label", inputValue); | ||
| } | ||
|
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| if (inputCol.equalsIgnoreCase("state")) { | ||
| if (like) { | ||
| throw new AnalysisException("Only label can use like"); | ||
| } | ||
| supportedColumns.put("state", inputValue); | ||
| } | ||
| } | ||
|
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| private void likeCheck(Expression expr, Map<String, String> supportedColumns) throws AnalysisException { | ||
| checkColumn(expr, true, supportedColumns); | ||
| } | ||
|
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| private void binaryCheck(Expression expr, Map<String, String> supportedColumns) throws AnalysisException { | ||
| checkColumn(expr, false, supportedColumns); | ||
| } | ||
|
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| private void compoundCheck(Expression expr, Map<String, String> supportedColumns) throws AnalysisException { | ||
| // current only support label and state | ||
| if (expr instanceof Not) { | ||
| throw new AnalysisException("Current not support NOT operator"); | ||
| } | ||
| for (int i = 0; i < 2; i++) { | ||
| Expression child = expr.child(i); | ||
| if (child instanceof CompoundPredicate) { | ||
| throw new AnalysisException("Current not support nested clause"); | ||
| } else if (child instanceof Like) { | ||
| likeCheck(child, supportedColumns); | ||
| } else if (child instanceof BinaryOperator) { | ||
| binaryCheck(child, supportedColumns); | ||
| } else { | ||
| throw new AnalysisException("Only support like/binary predicate"); | ||
| } | ||
| } | ||
| } | ||
| } |
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