cloud-fan commented on code in PR #44093: URL: https://github.com/apache/spark/pull/44093#discussion_r1425038124
########## 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) Review Comment: is it a user error? They can put an undefined variable in USING, right? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
