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[feature](nereids) Integrate nereids into current SQL process framewo…
…rk (apache#10304) To integrate the nereids optimizer with new SQLParser and Planner to existing SQL process framework, I abstract a interface which named "Planner" and let the Both planner from nereids and stale optimizer implement it, to disguish it with origin Planner, I rename the Planner to OriginalPlanner. As we don't want to impact the existing logic too much, I defined a LogicalPlanAdapter to adapt the logicalPlan that is the output of the new paser to the existing code. Besides, as the MySQL protocol supports sending multiple statements in one packet, so I add Nereids#SparseSQL method to handle this properly.
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108 changes: 108 additions & 0 deletions
108
fe/fe-core/src/main/java/org/apache/doris/nereids/parser/NereidsParser.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.parser; | ||
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| import org.apache.doris.analysis.StatementBase; | ||
| import org.apache.doris.nereids.DorisLexer; | ||
| import org.apache.doris.nereids.DorisParser; | ||
| import org.apache.doris.nereids.exceptions.ParsingException; | ||
| import org.apache.doris.nereids.trees.expressions.Expression; | ||
| import org.apache.doris.nereids.trees.plans.logical.LogicalPlan; | ||
| import org.apache.doris.nereids.trees.plans.logical.LogicalPlanAdapter; | ||
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| import org.antlr.v4.runtime.CharStreams; | ||
| import org.antlr.v4.runtime.CommonTokenStream; | ||
| import org.antlr.v4.runtime.ParserRuleContext; | ||
| import org.antlr.v4.runtime.atn.PredictionMode; | ||
| import org.antlr.v4.runtime.misc.ParseCancellationException; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.function.Function; | ||
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| /** | ||
| * Sql parser, convert sql DSL to logical plan. | ||
| */ | ||
| public class NereidsParser { | ||
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| /** | ||
| * In MySQL protocol, client could send multi-statement in. | ||
| * a single packet. | ||
| * https://dev.mysql.com/doc/internals/en/com-set-option.html | ||
| */ | ||
| public List<StatementBase> parseSQL(String originStr) throws Exception { | ||
| List<LogicalPlan> logicalPlanList = parseMultiple(originStr); | ||
| List<StatementBase> statementBaseList = new ArrayList<>(); | ||
| for (LogicalPlan logicalPlan : logicalPlanList) { | ||
| LogicalPlanAdapter logicalPlanAdapter = new LogicalPlanAdapter(logicalPlan); | ||
| statementBaseList.add(logicalPlanAdapter); | ||
| } | ||
| return statementBaseList; | ||
| } | ||
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| /** | ||
| * parse sql DSL string. | ||
| * | ||
| * @param sql sql string | ||
| * @return logical plan | ||
| */ | ||
| public LogicalPlan parseSingle(String sql) throws Exception { | ||
| return (LogicalPlan) parse(sql, DorisParser::singleStatement); | ||
| } | ||
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| public List<LogicalPlan> parseMultiple(String sql) throws Exception { | ||
| return (List<LogicalPlan>) parse(sql, DorisParser::multiStatements); | ||
| } | ||
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| private Object parse(String sql, Function<DorisParser, ParserRuleContext> parseFunction) { | ||
| try { | ||
| ParserRuleContext tree = toAst(sql, parseFunction); | ||
| LogicalPlanBuilder logicalPlanBuilder = new LogicalPlanBuilder(); | ||
| return logicalPlanBuilder.visit(tree); | ||
| } catch (StackOverflowError e) { | ||
| throw new ParsingException(e.getMessage()); | ||
| } | ||
| } | ||
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| private ParserRuleContext toAst(String sql, Function<DorisParser, ParserRuleContext> parseFunction) { | ||
| DorisLexer lexer = new DorisLexer(new CaseInsensitiveStream(CharStreams.fromString(sql))); | ||
| CommonTokenStream tokenStream = new CommonTokenStream(lexer); | ||
| DorisParser parser = new DorisParser(tokenStream); | ||
| // parser.addParseListener(PostProcessor) | ||
| // parser.removeErrorListeners() | ||
| // parser.addErrorListener(ParseErrorListener) | ||
| ParserRuleContext tree; | ||
| try { | ||
| // first, try parsing with potentially faster SLL mode | ||
| parser.getInterpreter().setPredictionMode(PredictionMode.SLL); | ||
| tree = parseFunction.apply(parser); | ||
| } catch (ParseCancellationException ex) { | ||
| // if we fail, parse with LL mode | ||
| tokenStream.seek(0); // rewind input stream | ||
| parser.reset(); | ||
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| parser.getInterpreter().setPredictionMode(PredictionMode.LL); | ||
| tree = parseFunction.apply(parser); | ||
| } | ||
| return tree; | ||
| } | ||
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| public Expression createExpression(String expression) { | ||
| return (Expression) parse(expression, DorisParser::expression); | ||
| } | ||
| } |
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fe/fe-core/src/main/java/org/apache/doris/nereids/parser/SqlParser.java
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