--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.impl.sql.compile.CallStatementNode\r
+\r
+ Licensed to the Apache Software Foundation (ASF) under one or more\r
+ contributor license agreements. See the NOTICE file distributed with\r
+ this work for additional information regarding copyright ownership.\r
+ The ASF licenses this file to you under the Apache License, Version 2.0\r
+ (the "License"); you may not use this file except in compliance with\r
+ the License. You may obtain a copy of the License at\r
+\r
+ http://www.apache.org/licenses/LICENSE-2.0\r
+\r
+ Unless required by applicable law or agreed to in writing, software\r
+ distributed under the License is distributed on an "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ See the License for the specific language governing permissions and\r
+ limitations under the License.\r
+\r
+ */\r
+\r
+package org.apache.derby.impl.sql.compile;\r
+\r
+import java.lang.reflect.Modifier;\r
+\r
+import org.apache.derby.catalog.types.RoutineAliasInfo;\r
+import org.apache.derby.iapi.error.StandardException;\r
+import org.apache.derby.iapi.reference.ClassName;\r
+import org.apache.derby.iapi.reference.SQLState;\r
+import org.apache.derby.iapi.services.classfile.VMOpcode;\r
+import org.apache.derby.iapi.services.compiler.MethodBuilder;\r
+import org.apache.derby.iapi.services.sanity.SanityManager;\r
+import org.apache.derby.iapi.sql.ResultDescription;\r
+import org.apache.derby.iapi.sql.compile.C_NodeTypes;\r
+import org.apache.derby.iapi.sql.compile.CompilerContext;\r
+import org.apache.derby.iapi.sql.compile.Visitable;\r
+import org.apache.derby.iapi.sql.compile.Visitor;\r
+import org.apache.derby.iapi.sql.conn.Authorizer;\r
+import org.apache.derby.iapi.sql.dictionary.DataDictionary;\r
+\r
+/**\r
+ * An CallStatementNode represents a CALL <procedure> statement.\r
+ * It is the top node of the query tree for that statement.\r
+ * A procedure call is very simple.\r
+ * \r
+ * CALL [<schema>.]<procedure>(<args>)\r
+ * \r
+ * <args> are either constants or parameter markers.\r
+ * This implementation assumes that no subqueries or aggregates\r
+ * can be in the argument list.\r
+ * \r
+ * A procedure is always represented by a MethodCallNode.\r
+ *\r
+ */\r
+public class CallStatementNode extends DMLStatementNode\r
+{ \r
+ /**\r
+ * The method call for the Java procedure. Guaranteed to be\r
+ * a JavaToSQLValueNode wrapping a MethodCallNode by checks\r
+ * in the parser.\r
+ */\r
+ private JavaToSQLValueNode methodCall;\r
+\r
+\r
+ /**\r
+ * Initializer for a CallStatementNode.\r
+ *\r
+ * @param methodCall The expression to "call"\r
+ */\r
+\r
+ public void init(Object methodCall)\r
+ {\r
+ super.init(null);\r
+ this.methodCall = (JavaToSQLValueNode) methodCall;\r
+ this.methodCall.getJavaValueNode().markForCallStatement();\r
+ }\r
+\r
+ /**\r
+ * Convert this object to a String. See comments in QueryTreeNode.java\r
+ * for how this should be done for tree printing.\r
+ *\r
+ * @return This object as a String\r
+ */\r
+\r
+ public String toString()\r
+ {\r
+ if (SanityManager.DEBUG)\r
+ {\r
+ return "CALL " + methodCall.toString() + "\n" +\r
+ super.toString();\r
+ }\r
+ else\r
+ {\r
+ return "";\r
+ }\r
+ }\r
+\r
+ public String statementToString()\r
+ {\r
+ return "CALL";\r
+ }\r
+\r
+ /**\r
+ * Prints the sub-nodes of this object. See QueryTreeNode.java for\r
+ * how tree printing is supposed to work.\r
+ *\r
+ * @param depth The depth of this node in the tree\r
+ */\r
+\r
+ public void printSubNodes(int depth)\r
+ {\r
+ if (SanityManager.DEBUG)\r
+ {\r
+ super.printSubNodes(depth);\r
+\r
+ if (methodCall != null)\r
+ {\r
+ printLabel(depth, "methodCall: ");\r
+ methodCall.treePrint(depth + 1);\r
+ }\r
+ }\r
+ }\r
+\r
+ /**\r
+ * Bind this UpdateNode. This means looking up tables and columns and\r
+ * getting their types, and figuring out the result types of all\r
+ * expressions, as well as doing view resolution, permissions checking,\r
+ * etc.\r
+ * <p>\r
+ * Binding an update will also massage the tree so that\r
+ * the ResultSetNode has a single column, the RID.\r
+ *\r
+ *\r
+ * @exception StandardException Thrown on error\r
+ */\r
+\r
+ public void bindStatement() throws StandardException\r
+ {\r
+ DataDictionary dd = getDataDictionary();\r
+\r
+ if (SanityManager.DEBUG)\r
+ SanityManager.ASSERT((dd != null), "Failed to get data dictionary");\r
+\r
+ getCompilerContext().pushCurrentPrivType(getPrivType());\r
+ methodCall = (JavaToSQLValueNode) methodCall.bindExpression(\r
+ (FromList) getNodeFactory().getNode(\r
+ C_NodeTypes.FROM_LIST,\r
+ getNodeFactory().doJoinOrderOptimization(),\r
+ getContextManager()), \r
+ null,\r
+ null);\r
+\r
+ // Disallow creation of BEFORE triggers which contain calls to \r
+ // procedures that modify SQL data. \r
+ checkReliability();\r
+\r
+ getCompilerContext().popCurrentPrivType();\r
+ }\r
+\r
+ /**\r
+ * Optimize a DML statement (which is the only type of statement that\r
+ * should need optimizing, I think). This method over-rides the one\r
+ * in QueryTreeNode.\r
+ *\r
+ * This method takes a bound tree, and returns an optimized tree.\r
+ * It annotates the bound tree rather than creating an entirely\r
+ * new tree.\r
+ *\r
+ * Throws an exception if the tree is not bound, or if the binding\r
+ * is out of date.\r
+ *\r
+ *\r
+ * @exception StandardException Thrown on error\r
+ */\r
+\r
+ public void optimizeStatement() throws StandardException\r
+ {\r
+ DataDictionary dd = getDataDictionary();\r
+\r
+ if (SanityManager.DEBUG)\r
+ SanityManager.ASSERT((dd != null), "Failed to get data dictionary");\r
+\r
+ /* Preprocess the method call tree */\r
+ methodCall = (JavaToSQLValueNode) methodCall.preprocess(\r
+ getCompilerContext().getNumTables(),\r
+ (FromList) getNodeFactory().getNode(\r
+ C_NodeTypes.FROM_LIST,\r
+ getNodeFactory().doJoinOrderOptimization(),\r
+ getContextManager()),\r
+ (SubqueryList) null,\r
+ (PredicateList) null);\r
+\r
+ }\r
+\r
+ /**\r
+ * Code generation for CallStatementNode.\r
+ * The generated code will contain:\r
+ * o A generated void method for the user's method call.\r
+ *\r
+ * @param acb The ActivationClassBuilder for the class being built\r
+ * @param mb The method for the execute() method to be built\r
+ *\r
+ * @exception StandardException Thrown on error\r
+ */\r
+ public void generate(ActivationClassBuilder acb,\r
+ MethodBuilder mb)\r
+ throws StandardException\r
+ {\r
+ JavaValueNode methodCallBody;\r
+\r
+ /* generate the parameters */\r
+ generateParameterValueSet(acb);\r
+\r
+ /* \r
+ * Skip over the JavaToSQLValueNode and call generate() for the JavaValueNode.\r
+ * (This skips over generated code which is unnecessary since we are throwing\r
+ * away any return value and which won't work with void methods.)\r
+ * generates:\r
+ * <methodCall.generate(acb)>;\r
+ * and adds it to userExprFun\r
+ */\r
+ methodCallBody = methodCall.getJavaValueNode();\r
+\r
+ /*\r
+ ** Tell the method call that its return value (if any) will be\r
+ ** discarded. This is so it doesn't generate the ?: operator\r
+ ** that would return null if the receiver is null. This is\r
+ ** important because the ?: operator cannot be made into a statement.\r
+ */\r
+ methodCallBody.markReturnValueDiscarded();\r
+\r
+ // this sets up the method\r
+ // generates:\r
+ // void userExprFun {\r
+ // method_call(<args>);\r
+ // }\r
+ //\r
+ // An expression function is used to avoid reflection.\r
+ // Since the arguments to a procedure are simple, this\r
+ // will be the only expression function and so it will\r
+ // be executed directly as e0.\r
+ MethodBuilder userExprFun = acb.newGeneratedFun("void", Modifier.PUBLIC);\r
+ userExprFun.addThrownException("java.lang.Exception");\r
+ methodCallBody.generate(acb, userExprFun);\r
+ userExprFun.endStatement();\r
+ userExprFun.methodReturn();\r
+ userExprFun.complete();\r
+\r
+ acb.pushGetResultSetFactoryExpression(mb);\r
+ acb.pushMethodReference(mb, userExprFun); // first arg\r
+ acb.pushThisAsActivation(mb); // arg 2\r
+ mb.callMethod(VMOpcode.INVOKEINTERFACE, (String) null, "getCallStatementResultSet", ClassName.ResultSet, 2);\r
+ }\r
+\r
+ public ResultDescription makeResultDescription()\r
+ {\r
+ return null;\r
+ }\r
+\r
+ /**\r
+ * Accept a visitor, and call v.visit()\r
+ * on child nodes as necessary. \r
+ * \r
+ * @param v the visitor\r
+ *\r
+ * @exception StandardException on error\r
+ */\r
+ public Visitable accept(Visitor v) \r
+ throws StandardException\r
+ {\r
+ if (v.skipChildren(this))\r
+ {\r
+ return v.visit(this);\r
+ }\r
+\r
+ Visitable returnNode = super.accept(v);\r
+\r
+ if (!v.stopTraversal())\r
+ {\r
+ methodCall = (JavaToSQLValueNode) methodCall.accept(v);\r
+ }\r
+\r
+ return returnNode;\r
+ }\r
+\r
+ /**\r
+ * Set default privilege of EXECUTE for this node. \r
+ */\r
+ int getPrivType()\r
+ {\r
+ return Authorizer.EXECUTE_PRIV;\r
+ }\r
+ \r
+ /**\r
+ * This method checks if the called procedure allows modification of SQL \r
+ * data. If yes, it cannot be compiled if the reliability is \r
+ * <code>CompilerContext.MODIFIES_SQL_DATA_PROCEDURE_ILLEGAL</code>. This \r
+ * reliability is set for BEFORE triggers in the create trigger node. This \r
+ * check thus disallows creation of BEFORE triggers which contain calls to \r
+ * procedures that modify SQL data in the trigger action statement. \r
+ * \r
+ * @throws StandardException\r
+ */\r
+ private void checkReliability() throws StandardException {\r
+ if(getSQLAllowedInProcedure() == RoutineAliasInfo.MODIFIES_SQL_DATA &&\r
+ getCompilerContext().getReliability() == CompilerContext.MODIFIES_SQL_DATA_PROCEDURE_ILLEGAL) \r
+ throw StandardException.newException(SQLState.LANG_UNSUPPORTED_TRIGGER_PROC);\r
+ }\r
+ \r
+ /**\r
+ * This method checks the SQL allowed by the called procedure. This method \r
+ * should be called only after the procedure has been resolved.\r
+ * \r
+ * @return SQL allowed by the procedure\r
+ */\r
+ private short getSQLAllowedInProcedure() {\r
+ RoutineAliasInfo routineInfo = ((MethodCallNode)methodCall.getJavaValueNode()).routineInfo;\r
+ \r
+ // If this method is called before the routine has been resolved, routineInfo will be null \r
+ if (SanityManager.DEBUG)\r
+ SanityManager.ASSERT((routineInfo != null), "Failed to get routineInfo");\r
+\r
+ return routineInfo.getSQLAllowed();\r
+ }\r
+}\r
projects / Benchmarks_CSolver.git / blobdiff