--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.impl.sql.execute.CreateSchemaConstantAction\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.execute;\r
+\r
+import org.apache.derby.iapi.sql.execute.ConstantAction;\r
+\r
+import org.apache.derby.iapi.store.access.TransactionController;\r
+\r
+import org.apache.derby.iapi.sql.dictionary.DataDescriptorGenerator;\r
+import org.apache.derby.iapi.sql.dictionary.DataDictionary;\r
+import org.apache.derby.iapi.sql.dictionary.SchemaDescriptor;\r
+import org.apache.derby.iapi.sql.conn.LanguageConnectionContext;\r
+\r
+import org.apache.derby.iapi.reference.SQLState;\r
+\r
+import org.apache.derby.iapi.sql.Activation;\r
+\r
+import org.apache.derby.iapi.error.StandardException;\r
+\r
+import org.apache.derby.iapi.services.sanity.SanityManager;\r
+\r
+import org.apache.derby.catalog.UUID;\r
+\r
+/**\r
+ * This class describes actions that are ALWAYS performed for a\r
+ * CREATE SCHEMA Statement at Execution time.\r
+ *\r
+ */\r
+\r
+class CreateSchemaConstantAction extends DDLConstantAction\r
+{\r
+\r
+ private final String aid; // authorization id\r
+ private final String schemaName;\r
+ \r
+\r
+ // CONSTRUCTORS\r
+\r
+ /**\r
+ * Make the ConstantAction for a CREATE SCHEMA statement.\r
+ * When executed, will set the default schema to the\r
+ * new schema if the setToDefault parameter is set to\r
+ * true.\r
+ *\r
+ * @param schemaName Name of table.\r
+ * @param aid Authorizaton id\r
+ */\r
+ CreateSchemaConstantAction(\r
+ String schemaName,\r
+ String aid)\r
+ {\r
+ this.schemaName = schemaName;\r
+ this.aid = aid;\r
+ }\r
+\r
+ ///////////////////////////////////////////////\r
+ //\r
+ // OBJECT SHADOWS\r
+ //\r
+ ///////////////////////////////////////////////\r
+\r
+ public String toString()\r
+ {\r
+ // Do not put this under SanityManager.DEBUG - it is needed for\r
+ // error reporting.\r
+ return "CREATE SCHEMA " + schemaName;\r
+ }\r
+\r
+ // INTERFACE METHODS\r
+\r
+\r
+ /**\r
+ * This is the guts of the Execution-time logic for CREATE SCHEMA.\r
+ *\r
+ * @see ConstantAction#executeConstantAction\r
+ *\r
+ * @exception StandardException Thrown on failure\r
+ */\r
+ public void executeConstantAction( Activation activation )\r
+ throws StandardException\r
+ {\r
+ LanguageConnectionContext lcc = activation.getLanguageConnectionContext();\r
+ DataDictionary dd = lcc.getDataDictionary();\r
+ TransactionController tc = lcc.getTransactionExecute();\r
+ DataDescriptorGenerator ddg = dd.getDataDescriptorGenerator();\r
+\r
+ SchemaDescriptor sd = dd.getSchemaDescriptor(schemaName, lcc.getTransactionExecute(), false);\r
+\r
+ //if the schema descriptor is an in-memory schema, we donot throw schema already exists exception for it.\r
+ //This is to handle in-memory SESSION schema for temp tables\r
+ if ((sd != null) && (sd.getUUID() != null))\r
+ {\r
+ throw StandardException.newException(SQLState.LANG_OBJECT_ALREADY_EXISTS, "Schema" , schemaName);\r
+ }\r
+\r
+ UUID tmpSchemaId = dd.getUUIDFactory().createUUID();\r
+\r
+ /*\r
+ ** AID defaults to connection authorization if not \r
+ ** specified in CREATE SCHEMA (if we had module\r
+ ** authorizations, that would be the first check\r
+ ** for default, then session aid).\r
+ */\r
+ String thisAid = aid;\r
+ if (thisAid == null)\r
+ {\r
+ thisAid = lcc.getAuthorizationId();\r
+ }\r
+\r
+ /*\r
+ ** Inform the data dictionary that we are about to write to it.\r
+ ** There are several calls to data dictionary "get" methods here\r
+ ** that might be done in "read" mode in the data dictionary, but\r
+ ** it seemed safer to do this whole operation in "write" mode.\r
+ **\r
+ ** We tell the data dictionary we're done writing at the end of\r
+ ** the transaction.\r
+ */\r
+ dd.startWriting(lcc);\r
+\r
+ sd = ddg.newSchemaDescriptor(schemaName,\r
+ thisAid,\r
+ tmpSchemaId);\r
+\r
+ dd.addDescriptor(sd, null, DataDictionary.SYSSCHEMAS_CATALOG_NUM, false, tc);\r
+ }\r
+}\r
projects / Benchmarks_CSolver.git / blobdiff