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[Feat](Nereids) add use mv hint (#40167)
support hint like: /*+ no_use_mv(tablename mvname) / which forbid tablename(indexname) to be choose or /+ use_mv(tablename mvname) */ which choose specific materialize view
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fe/fe-core/src/main/java/org/apache/doris/nereids/hint/UseMvHint.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. | ||
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| package org.apache.doris.nereids.hint; | ||
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| import java.util.ArrayList; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| /** | ||
| * rule hint. | ||
| */ | ||
| public class UseMvHint extends Hint { | ||
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| private final boolean isUseMv; | ||
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| private final boolean isAllMv; | ||
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| private final List<String> parameters; | ||
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| private final Map<String, String> useMvTableColumnMap; | ||
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| private final Map<String, List<String>> noUseMvTableColumnMap; | ||
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| /** | ||
| * constructor of use mv hint | ||
| * @param hintName use mv | ||
| * @param parameters original parameters | ||
| * @param isUseMv use_mv hint or no_use_mv hint | ||
| * @param isAllMv should all mv be controlled | ||
| */ | ||
| public UseMvHint(String hintName, List<String> parameters, boolean isUseMv, boolean isAllMv) { | ||
| super(hintName); | ||
| this.isUseMv = isUseMv; | ||
| this.isAllMv = isAllMv; | ||
| this.parameters = parameters; | ||
| this.useMvTableColumnMap = initUseMvTableColumnMap(parameters); | ||
| this.noUseMvTableColumnMap = initNoUseMvTableColumnMap(parameters); | ||
| } | ||
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| private Map<String, String> initUseMvTableColumnMap(List<String> parameters) { | ||
| Map<String, String> tempUseMvTableColumnMap = new HashMap<>(); | ||
| if (!isUseMv) { | ||
| return tempUseMvTableColumnMap; | ||
| } | ||
| if (parameters.size() % 2 == 1) { | ||
| this.setStatus(HintStatus.SYNTAX_ERROR); | ||
| this.setErrorMessage("parameter of use_mv hint must be in pairs"); | ||
| return tempUseMvTableColumnMap; | ||
| } | ||
| for (int i = 0; i < parameters.size(); i += 2) { | ||
| String tableName = parameters.get(i); | ||
| String columnName = parameters.get(i + 1); | ||
| if (tempUseMvTableColumnMap.containsKey(tableName)) { | ||
| this.setStatus(HintStatus.SYNTAX_ERROR); | ||
| this.setErrorMessage("use_mv hint should only have one mv in one table: " | ||
| + tableName + "." + columnName); | ||
| break; | ||
| } | ||
| tempUseMvTableColumnMap.put(tableName, columnName); | ||
| } | ||
| return tempUseMvTableColumnMap; | ||
| } | ||
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| private Map<String, List<String>> initNoUseMvTableColumnMap(List<String> parameters) { | ||
| Map<String, List<String>> tempNoUseMvTableColumnMap = new HashMap<>(); | ||
| if (isUseMv) { | ||
| return tempNoUseMvTableColumnMap; | ||
| } | ||
| if (parameters.size() % 2 == 1) { | ||
| this.setStatus(HintStatus.SYNTAX_ERROR); | ||
| this.setErrorMessage("parameter of no_use_mv hint must be in pairs"); | ||
| return tempNoUseMvTableColumnMap; | ||
| } | ||
| for (int i = 0; i < parameters.size(); i += 2) { | ||
| String tableName = parameters.get(i); | ||
| String columnName = parameters.get(i + 1); | ||
| if (tempNoUseMvTableColumnMap.containsKey(tableName)) { | ||
| tempNoUseMvTableColumnMap.get(tableName).add(columnName); | ||
| } else { | ||
| List<String> list = new ArrayList<>(); | ||
| list.add(columnName); | ||
| tempNoUseMvTableColumnMap.put(tableName, list); | ||
| } | ||
| } | ||
| return tempNoUseMvTableColumnMap; | ||
| } | ||
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| public boolean isUseMv() { | ||
| return isUseMv; | ||
| } | ||
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| public boolean isAllMv() { | ||
| return isAllMv; | ||
| } | ||
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| public String getUseMvName(String tableName) { | ||
| return useMvTableColumnMap.get(tableName); | ||
| } | ||
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| public List<String> getNoUseMVName(String tableName) { | ||
| return noUseMvTableColumnMap.get(tableName); | ||
| } | ||
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| @Override | ||
| public String getExplainString() { | ||
| StringBuilder out = new StringBuilder(); | ||
| if (isUseMv) { | ||
| out.append("use_mv"); | ||
| } else { | ||
| out.append("no_use_mv"); | ||
| } | ||
| if (!parameters.isEmpty()) { | ||
| out.append("("); | ||
| for (int i = 0; i < parameters.size(); i++) { | ||
| if (i % 2 == 0) { | ||
| out.append(parameters.get(i)); | ||
| } else { | ||
| out.append("."); | ||
| out.append(parameters.get(i)); | ||
| out.append(" "); | ||
| } | ||
| } | ||
| out.append(")"); | ||
| } | ||
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| return out.toString(); | ||
| } | ||
| } |
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