korlov42 commented on code in PR #7303: URL: https://github.com/apache/ignite-3/pull/7303#discussion_r2650899006
########## modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/expressions/SqlExpressionFactoryAdapter.java: ########## @@ -0,0 +1,318 @@ +/* + * 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.ignite.internal.sql.engine.expressions; + +import static java.util.Objects.requireNonNull; +import static org.apache.ignite.internal.sql.engine.sql.IgniteSqlParser.PARSER_CONFIG; + +import java.util.Set; +import java.util.function.LongSupplier; +import org.apache.calcite.adapter.java.JavaTypeFactory; +import org.apache.calcite.linq4j.QueryProvider; +import org.apache.calcite.rel.type.RelDataType; +import org.apache.calcite.rex.RexNode; +import org.apache.calcite.runtime.CalciteContextException; +import org.apache.calcite.schema.SchemaPlus; +import org.apache.calcite.sql.SqlCall; +import org.apache.calcite.sql.SqlIdentifier; +import org.apache.calcite.sql.SqlKind; +import org.apache.calcite.sql.SqlNode; +import org.apache.calcite.sql.parser.SqlParseException; +import org.apache.calcite.sql.parser.SqlParser; +import org.apache.calcite.sql.parser.SqlParserPos; +import org.apache.calcite.sql.type.SqlTypeUtil; +import org.apache.calcite.sql.util.SqlShuttle; +import org.apache.calcite.sql.validate.SqlValidator; +import org.apache.calcite.util.SourceStringReader; +import org.apache.calcite.util.Static; +import org.apache.calcite.util.Util.FoundOne; +import org.apache.ignite.internal.sql.engine.api.expressions.ContextBuilder; +import org.apache.ignite.internal.sql.engine.api.expressions.EvaluationContext; +import org.apache.ignite.internal.sql.engine.api.expressions.ExpressionEvaluationException; +import org.apache.ignite.internal.sql.engine.api.expressions.ExpressionFactory; +import org.apache.ignite.internal.sql.engine.api.expressions.ExpressionParsingException; +import org.apache.ignite.internal.sql.engine.api.expressions.ExpressionValidationException; +import org.apache.ignite.internal.sql.engine.api.expressions.IgnitePredicate; +import org.apache.ignite.internal.sql.engine.api.expressions.RowAccessor; +import org.apache.ignite.internal.sql.engine.api.expressions.RowFactoryFactory; +import org.apache.ignite.internal.sql.engine.exec.SqlEvaluationContext; +import org.apache.ignite.internal.sql.engine.exec.exp.SqlExpressionFactory; +import org.apache.ignite.internal.sql.engine.exec.exp.SqlPredicate; +import org.apache.ignite.internal.sql.engine.prepare.IgnitePlanner; +import org.apache.ignite.internal.sql.engine.prepare.PlanningContext; +import org.apache.ignite.internal.sql.engine.sql.IgniteSqlParser; +import org.apache.ignite.internal.sql.engine.util.Commons; +import org.apache.ignite.internal.sql.engine.util.TypeUtils; +import org.apache.ignite.internal.type.StructNativeType; +import org.apache.ignite.internal.util.ExceptionUtils; +import org.jetbrains.annotations.Nullable; + +/** + * Implementation of {@link ExpressionFactory} interface which parses and validates the given expression but delegates actual implementation + * to the instance of {@link SqlExpressionFactory}. + */ +public class SqlExpressionFactoryAdapter implements ExpressionFactory { + private static final String SINGLE_INPUT_ROW_NAMESPACE_NAME = "INPUT"; + + private final SqlExpressionFactory factory; + + /** Constructs tye adapter. */ + public SqlExpressionFactoryAdapter( + SqlExpressionFactory factory + ) { + this.factory = factory; + } + + @Override + public <RowT> ContextBuilder<RowT> contextBuilder() { + return new ContextBuilderImpl<>(); + } + + @Override + public IgnitePredicate predicate( + String expression, + StructNativeType inputRowType + ) throws ExpressionParsingException, ExpressionValidationException { + SqlNode expressionAst = parse(expression); + + try { + // Reject subqueries earlier so we can implement lightweight validation + // without necessity to register all the namespaces. + expressionAst.accept(RejectSubQueriesValidator.INSTANCE); + + // Usage of system context-dependent functions can be validated here as well. + expressionAst.accept(RejectContextDependentFunctionValidator.INSTANCE); + } catch (FoundOne one) { + String message = (String) one.getNode(); + + assert message != null; + + throw new ExpressionValidationException(message); + } + + try (IgnitePlanner planner = createPlanner()) { + SqlValidator validator = planner.validator(); + + RowBasedScope scope = new RowBasedScope(validator.getEmptyScope()); + + RelDataType relDataType = TypeUtils.native2relationalType(planner.getTypeFactory(), inputRowType); + scope.addChild(new RowNamespace(validator, relDataType), SINGLE_INPUT_ROW_NAMESPACE_NAME, false); + + try { + expressionAst.validateExpr(validator, scope); + + try { + // Aggregate functions are not resolved until validation, hence we cannot reject + // such expressions until syntax tree is validated. + expressionAst.accept(RejectAggregatesValidator.INSTANCE); + } catch (FoundOne one) { + String message = (String) one.getNode(); + + assert message != null; + + throw new ExpressionValidationException(message); + } + + RelDataType resultType = validator.deriveType(scope, expressionAst); + + if (!SqlTypeUtil.isBoolean(resultType)) { + throw new ExpressionValidationException("Expected BOOLEAN expression but " + resultType + " was provided."); + } + } catch (CalciteContextException ex) { + String message = ex.getMessage(); + if (message == null) { + message = "Unable to validate expression."; + } + + throw new ExpressionValidationException(message); + } + + RexNode rexNode = planner.sqlToRelConverter().convertExpressionExt(expressionAst, scope, relDataType); + + SqlPredicate predicate = factory.predicate( + rexNode, + relDataType + ); + + return new IgnitePredicate() { Review Comment: introduced static private class instead -- This is an automated message from the Apache Git Service. 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