--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.iapi.sql.execute.ConstantAction\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.iapi.sql.execute;\r
+\r
+import org.apache.derby.iapi.error.StandardException;\r
+\r
+import org.apache.derby.iapi.sql.Activation;\r
+\r
+import org.apache.derby.catalog.UUID;\r
+\r
+/**\r
+ * This interface describes actions that are ALWAYS performed for a\r
+ * Statement at Execution time. For instance, it is used for DDL\r
+ * statements to describe what they should stuff into the catalogs.\r
+ * <p>\r
+ * An object satisfying this interface is put into the PreparedStatement\r
+ * and run at Execution time. Thus ConstantActions may be shared\r
+ * across threads and must not store connection/thread specific\r
+ * information in any instance field.\r
+ *\r
+ */\r
+\r
+public interface ConstantAction\r
+{\r
+ /**\r
+ * Run the ConstantAction.\r
+ *\r
+ * @param activation The execution environment for this constant action.\r
+ *\r
+ * @exception StandardException Thrown on failure\r
+ */\r
+ public void executeConstantAction( Activation activation )\r
+ throws StandardException;\r
+}\r