JingDas commented on code in PR #21855: URL: https://github.com/apache/doris/pull/21855#discussion_r1329769524
########## fe/fe-core/src/main/java/org/apache/doris/nereids/parser/trino/LogicalPlanTrinoBuilder.java: ########## @@ -0,0 +1,312 @@ +// 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.parser.trino; + +import org.apache.doris.nereids.analyzer.UnboundAlias; +import org.apache.doris.nereids.analyzer.UnboundFunction; +import org.apache.doris.nereids.analyzer.UnboundOneRowRelation; +import org.apache.doris.nereids.analyzer.UnboundRelation; +import org.apache.doris.nereids.analyzer.UnboundResultSink; +import org.apache.doris.nereids.analyzer.UnboundSlot; +import org.apache.doris.nereids.exceptions.AnalysisException; +import org.apache.doris.nereids.exceptions.DialectTransformException; +import org.apache.doris.nereids.parser.LogicalPlanBuilderAssistant; +import org.apache.doris.nereids.parser.ParserContext; +import org.apache.doris.nereids.trees.expressions.Cast; +import org.apache.doris.nereids.trees.expressions.Expression; +import org.apache.doris.nereids.trees.expressions.NamedExpression; +import org.apache.doris.nereids.trees.expressions.StatementScopeIdGenerator; +import org.apache.doris.nereids.trees.expressions.functions.Function; +import org.apache.doris.nereids.trees.expressions.literal.BooleanLiteral; +import org.apache.doris.nereids.trees.expressions.literal.DateTimeLiteral; +import org.apache.doris.nereids.trees.expressions.literal.Literal; +import org.apache.doris.nereids.trees.expressions.literal.TinyIntLiteral; +import org.apache.doris.nereids.trees.expressions.literal.VarcharLiteral; +import org.apache.doris.nereids.trees.plans.logical.LogicalPlan; +import org.apache.doris.nereids.trees.plans.logical.LogicalProject; +import org.apache.doris.nereids.types.DataType; +import org.apache.doris.nereids.types.coercion.CharacterType; + +import com.google.common.collect.ImmutableList; +import com.google.common.collect.Lists; + +import java.util.ArrayList; +import java.util.List; +import java.util.Optional; +import java.util.stream.Collectors; + +/** + * The actually planBuilder for Trino SQL to Doris logical plan. + * It depends on {@link io.trino.sql.tree.AstVisitor} + */ +public class LogicalPlanTrinoBuilder extends io.trino.sql.tree.AstVisitor<Object, ParserContext> { + + public Object visit(io.trino.sql.tree.Node node, ParserContext context) { + return this.process(node, context); + } + + public <T> T visit(io.trino.sql.tree.Node node, ParserContext context, Class<T> clazz) { + return clazz.cast(this.process(node, context)); + } + + public <T> List<T> visit(List<? extends io.trino.sql.tree.Node> nodes, ParserContext context, Class<T> clazz) { + return nodes.stream() + .map(node -> clazz.cast(this.process(node, context))) + .collect(Collectors.toList()); + } + + public Object processOptional(Optional<? extends io.trino.sql.tree.Node> node, ParserContext context) { + return node.map(value -> this.process(value, context)).orElse(null); + } + + public <T> T processOptional(Optional<? extends io.trino.sql.tree.Node> node, + ParserContext context, Class<T> clazz) { + return node.map(value -> clazz.cast(this.process(value, context))).orElse(null); + } + + @Override + protected LogicalPlan visitQuery(io.trino.sql.tree.Query node, ParserContext context) { + io.trino.sql.tree.QueryBody queryBody = node.getQueryBody(); + LogicalPlan logicalPlan = (LogicalPlan) visit(queryBody, context); + if (!(queryBody instanceof io.trino.sql.tree.QuerySpecification)) { + // TODO: need to handle orderBy and limit + throw new DialectTransformException("transform querySpecification"); + } + return logicalPlan; + } + + @Override + protected LogicalPlan visitQuerySpecification(io.trino.sql.tree.QuerySpecification node, + ParserContext context) { + // from -> where -> group by -> having -> select + Optional<io.trino.sql.tree.Relation> from = node.getFrom(); + LogicalPlan fromPlan = processOptional(from, context, LogicalPlan.class); + List<io.trino.sql.tree.SelectItem> selectItems = node.getSelect().getSelectItems(); + if (from == null || !from.isPresent()) { + // TODO: support query values + List<NamedExpression> expressions = selectItems.stream() + .map(item -> visit(item, context, NamedExpression.class)) + .collect(Collectors.toList()); + return new UnboundOneRowRelation(StatementScopeIdGenerator.newRelationId(), expressions); + } + // TODO: support predicate, aggregate, having, order by, limit + // TODO: support distinct + boolean isDistinct = node.getSelect().isDistinct(); + return new UnboundResultSink<>(withProjection(selectItems, fromPlan, isDistinct, context)); + } + + private LogicalProject withProjection(List<io.trino.sql.tree.SelectItem> selectItems, + LogicalPlan input, + boolean isDistinct, + ParserContext context) { + List<NamedExpression> expressions = selectItems.stream() + .map(item -> visit(item, context, NamedExpression.class)) + .collect(Collectors.toList()); + return new LogicalProject(expressions, new ArrayList<>(), isDistinct, input); + } + + @Override + protected Expression visitSingleColumn(io.trino.sql.tree.SingleColumn node, ParserContext context) { + String alias = node.getAlias().map(io.trino.sql.tree.Identifier::getValue).orElse(null); + Expression expr = visit(node.getExpression(), context, Expression.class); + if (expr instanceof NamedExpression) { + return (NamedExpression) expr; + } else { + return alias == null ? new UnboundAlias(expr) : new UnboundAlias(expr, alias); + } + } + + @Override + protected Object visitIdentifier(io.trino.sql.tree.Identifier node, ParserContext context) { + return new UnboundSlot(Lists.newArrayList(node.getValue())); + } + + /* ******************************************************************************************** + * visitFunction + * ******************************************************************************************** */ + + @Override + protected Function visitFunctionCall(io.trino.sql.tree.FunctionCall node, ParserContext context) { + List<Expression> exprs = visit(node.getArguments(), context, Expression.class); + Function transformedFn = + TrinoFnCallTransformers.transform(node.getName().toString(), exprs, context); + if (transformedFn == null) { + transformedFn = new UnboundFunction(node.getName().toString(), exprs); + + } + return transformedFn; + } + + /* ******************************************************************************************** + * visitTable + * ******************************************************************************************** */ + + @Override + protected LogicalPlan visitTable(io.trino.sql.tree.Table node, ParserContext context) { + io.trino.sql.tree.QualifiedName name = node.getName(); + List<String> tableId = name.getParts(); + List<String> partitionNames = new ArrayList<>(); + // build table + return LogicalPlanBuilderAssistant.withCheckPolicy( + new UnboundRelation(StatementScopeIdGenerator.newRelationId(), tableId, + partitionNames, false)); + } + + /* ******************************************************************************************** + * visit buildIn function + * ******************************************************************************************** */ + + @Override + protected Expression visitCast(io.trino.sql.tree.Cast node, ParserContext context) { + Expression expr = visit(node.getExpression(), context, Expression.class); + DataType dataType = mappingType(node.getType()); + Expression cast = new Cast(expr, dataType); + if (dataType.isStringLikeType() && ((CharacterType) dataType).getLen() >= 0) { + List<Expression> args = ImmutableList.of( + cast, + new TinyIntLiteral((byte) 1), + Literal.of(((CharacterType) dataType).getLen()) + ); + return new UnboundFunction("substr", args); + } else { + return cast; + } + } + + /* ******************************************************************************************** + * visitLiteral + * ******************************************************************************************** */ + + @Override + protected Object visitLiteral(io.trino.sql.tree.Literal node, ParserContext context) { + return super.visitLiteral(node, context); + } + + @Override + protected Literal visitLongLiteral(io.trino.sql.tree.LongLiteral node, ParserContext context) { + return LogicalPlanBuilderAssistant.handleIntegerLiteral(String.valueOf(node.getValue())); + } + + @Override + protected Object visitDoubleLiteral(io.trino.sql.tree.DoubleLiteral node, ParserContext context) { + return super.visitDoubleLiteral(node, context); + } + + @Override + protected Object visitDecimalLiteral(io.trino.sql.tree.DecimalLiteral node, ParserContext context) { + return super.visitDecimalLiteral(node, context); + } + + @Override + protected Object visitTimestampLiteral(io.trino.sql.tree.TimestampLiteral node, ParserContext context) { + try { + String value = node.getValue(); + if (value.length() <= 10) { + value += " 00:00:00"; + } + return new DateTimeLiteral(value); + } catch (AnalysisException e) { + throw new DialectTransformException("transform timestamp literal"); + } + } + + @Override + protected Object visitGenericLiteral(io.trino.sql.tree.GenericLiteral node, ParserContext context) { + return super.visitGenericLiteral(node, context); + } + + @Override + protected Object visitTimeLiteral(io.trino.sql.tree.TimeLiteral node, ParserContext context) { + return super.visitTimeLiteral(node, context); + } + + @Override + protected Object visitCharLiteral(io.trino.sql.tree.CharLiteral node, ParserContext context) { + return super.visitCharLiteral(node, context); + } + + @Override + protected Expression visitStringLiteral(io.trino.sql.tree.StringLiteral node, ParserContext context) { + // TODO: add unescapeSQLString. + String txt = node.getValue(); + if (txt.length() <= 1) { + return new VarcharLiteral(txt); + } + return new VarcharLiteral(LogicalPlanBuilderAssistant.escapeBackSlash(txt.substring(0, txt.length()))); + } + + @Override + protected Object visitIntervalLiteral(io.trino.sql.tree.IntervalLiteral node, ParserContext context) { + return super.visitIntervalLiteral(node, context); + } + + @Override + protected Object visitBinaryLiteral(io.trino.sql.tree.BinaryLiteral node, ParserContext context) { + return super.visitBinaryLiteral(node, context); + } + + @Override + protected Object visitNullLiteral(io.trino.sql.tree.NullLiteral node, ParserContext context) { + return super.visitNullLiteral(node, context); Review Comment: Fixed it with NullLiteral.INSTANCE -- This is an automated message from the Apache Git Service. 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