milastdbx commented on code in PR #44093: URL: https://github.com/apache/spark/pull/44093#discussion_r1425342125
########## sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/executeImmediate.scala: ########## @@ -0,0 +1,186 @@ +/* + * 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.spark.sql.catalyst.analysis + +import scala.util.{Either, Left, Right} + +import org.apache.spark.SparkException +import org.apache.spark.sql.AnalysisException +import org.apache.spark.sql.catalyst.expressions.{Alias, Expression, NamedExpression, VariableReference} +import org.apache.spark.sql.catalyst.parser.{ParseException, ParserInterface} +import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, SetVariable} +import org.apache.spark.sql.catalyst.rules.Rule +import org.apache.spark.sql.catalyst.trees.TreePattern.{EXECUTE_IMMEDIATE, TreePattern} +import org.apache.spark.sql.connector.catalog.CatalogManager +import org.apache.spark.sql.errors.QueryCompilationErrors.unresolvedVariableError +import org.apache.spark.sql.types.StringType + +/** + * Logical plan representing execute immediate query. + * + * @param args + * parameters of query + * @param query + * query string or variable + * @param targetVariables + * variables to store the result of the query + */ +case class ExecuteImmediateQuery( + args: Seq[Expression], + query: Either[String, UnresolvedAttribute], + targetVariables: Option[Seq[UnresolvedAttribute]], + parser: ParserInterface) + extends UnresolvedLeafNode { + final override val nodePatterns: Seq[TreePattern] = Seq(EXECUTE_IMMEDIATE) +} + +/** + * This rule substitutes execute immediate query node with plan that is passed as string literal + * or session parameter. + */ +class SubstituteExecuteImmediate(val catalogManager: CatalogManager) + extends Rule[LogicalPlan] + with ColumnResolutionHelper { + + def resolveVariable(e: Expression): Expression = { + + /** + * We know that the expression is either UnresolvedAttribute or Alias, as passed from the + * parser. If it is an UnresolvedAttribute, we look it up in the catalog and return it. If it + * is an Alias, we resolve the child and return an Alias with the same name. + */ + e match { + case u: UnresolvedAttribute => + getVariableReference(u.nameParts) + case a: Alias => + Alias(resolveVariable(a.child), a.name)() + + case other => + throw SparkException.internalError( + "Unexpected variable expression in ParametrizedQuery: " + other) + } + } + + def resolveArguments(expressions: Seq[Expression]): Seq[Expression] = { + expressions.map { exp => + if (exp.resolved) { + exp + } else { + resolveVariable(exp) + } + } + } + + def extractQueryString(either: Either[String, UnresolvedAttribute]): String = { + either match { + case Left(v) => v + case Right(u) => + val varReference = getVariableReference(u.nameParts) + + if (!varReference.dataType.sameType(StringType)) { + throw new AnalysisException( + errorClass = "INVALID_VARIABLE_TYPE_FOR_QUERY_EXECUTE_IMMEDIATE", + messageParameters = Map("varType" -> varReference.dataType.simpleString)) + } + + // Call eval with null value passed instead of a row. + // This is ok as this is variable and invoking eval should + // be independent of row value. + varReference.eval(null).toString + } + } + + override def apply(plan: LogicalPlan): LogicalPlan = + plan.resolveOperatorsWithPruning(_.containsPattern(EXECUTE_IMMEDIATE), ruleId) { + case ExecuteImmediateQuery(expressions, query, targetVariablesOpt, parser) => + val queryString = extractQueryString(query) + val plan = parseStatement(parser, queryString, targetVariablesOpt) + + val posNodes = plan.collect { case p: LogicalPlan => + p.expressions.flatMap(_.collect { case n: PosParameter => n }) + }.flatten + val namedNodes = plan.collect { case p: LogicalPlan => + p.expressions.flatMap(_.collect { case n: NamedParameter => n }) + }.flatten + + val queryPlan = if (expressions.isEmpty || (posNodes.isEmpty && namedNodes.isEmpty)) { + plan + } else if (posNodes.nonEmpty && namedNodes.nonEmpty) { + throw new AnalysisException( + errorClass = "INVALID_QUERY_BOTH_POSITIONAL_AND_NAMED_PARAMETERS_PRESENT", + messageParameters = Map.empty) + } else { + if (posNodes.nonEmpty) { + PosParameterizedQuery( + plan, + // We need to resolve arguments before Resolution batch to make sure + // that some rule does not accidently resolve our parameters. + // We do not want this as they can resolve some unsupported parameters + resolveArguments(expressions)) + } else { + val namedExpressions = expressions.collect { case (e: NamedExpression) => e } Review Comment: My take here is that we should ignore unnamed parameters -- This is an automated message from the Apache Git Service. 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