[#3355] Added support for DROP SEQUENCE statements

jOOQ/src/main/java/org/jooq/Clause.java

@@ -885,6 +885,16 @@ public enum Clause {
      */
     DROP_INDEX,
 
+    /**
+     * A complete <code>DROP SEQUENCE</code> statement.
+     */
+    DROP_SEQUENCE,
+
+    /**
+     * A <code>SEQUENCE</code> clause within a {@link #DROP_SEQUENCE} statement.
+     */
+    DROP_SEQUENCE_SEQUENCE,
+
     // -------------------------------------------------------------------------
     // Other clauses
     // -------------------------------------------------------------------------

jOOQ/src/main/java/org/jooq/DSLContext.java

@@ -4710,6 +4710,22 @@ public interface DSLContext {
     @Support
     DropIndexFinalStep dropIndex(String index);
 
+    /**
+     * Create a new DSL <code>DROP SEQUENCE</code> statement.
+     *
+     * @see DSLContext#dropSequence(Sequence)
+     */
+    @Support({ FIREBIRD, H2, HSQLDB, POSTGRES })
+    DropSequenceFinalStep dropSequence(Sequence<?> sequence);
+
+    /**
+     * Create a new DSL <code>DROP SEQUENCE</code> statement.
+     *
+     * @see DSLContext#dropSequence(Sequence)
+     */
+    @Support({ FIREBIRD, H2, HSQLDB, POSTGRES })
+    DropSequenceFinalStep dropSequence(String sequence);
+
     /**
      * Create a new DSL truncate statement.
      * <p>

jOOQ/src/main/java/org/jooq/DropSequenceFinalStep.java

@@ -0,0 +1,50 @@
+/**
+ * Copyright (c) 2009-2014, Data Geekery GmbH (http://www.datageekery.com)
+ * All rights reserved.
+ *
+ * This work is dual-licensed
+ * - under the Apache Software License 2.0 (the "ASL")
+ * - under the jOOQ License and Maintenance Agreement (the "jOOQ License")
+ * =============================================================================
+ * You may choose which license applies to you:
+ *
+ * - If you're using this work with Open Source databases, you may choose
+ *   either ASL or jOOQ License.
+ * - If you're using this work with at least one commercial database, you must
+ *   choose jOOQ License
+ *
+ * For more information, please visit http://www.jooq.org/licenses
+ *
+ * Apache Software License 2.0:
+ * -----------------------------------------------------------------------------
+ * Licensed 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.
+ *
+ * jOOQ License and Maintenance Agreement:
+ * -----------------------------------------------------------------------------
+ * Data Geekery grants the Customer the non-exclusive, timely limited and
+ * non-transferable license to install and use the Software under the terms of
+ * the jOOQ License and Maintenance Agreement.
+ *
+ * This library is distributed with a LIMITED WARRANTY. See the jOOQ License
+ * and Maintenance Agreement for more details: http://www.jooq.org/licensing
+ */
+package org.jooq;
+
+/**
+ * A {@link Query} that can drop sequences.
+ *
+ * @author Lukas Eder
+ */
+public interface DropSequenceFinalStep extends Query {
+
+}

jOOQ/src/main/java/org/jooq/impl/DSL.java

@@ -97,6 +97,7 @@ import org.jooq.Delete;
 import org.jooq.DeleteWhereStep;
 import org.jooq.DerivedColumnList;
 import org.jooq.DropIndexFinalStep;
+import org.jooq.DropSequenceFinalStep;
 import org.jooq.DropTableStep;
 import org.jooq.Field;
 import org.jooq.GroupConcatOrderByStep;
@@ -4283,6 +4284,26 @@ public class DSL {
         return using(new DefaultConfiguration()).dropIndex(index);
     }
 
+    /**
+     * Create a new DSL <code>DROP SEQUENCE</code> statement.
+     *
+     * @see DSLContext#dropSequence(Sequence)
+     */
+    @Support({ FIREBIRD, H2, HSQLDB, POSTGRES })
+    public static <T extends Number> DropSequenceFinalStep dropSequence(Sequence<?> sequence) {
+        return using(new DefaultConfiguration()).dropSequence(sequence);
+    }
+
+    /**
+     * Create a new DSL <code>DROP SEQUENCE</code> statement.
+     *
+     * @see DSLContext#dropSequence(Sequence)
+     */
+    @Support({ FIREBIRD, H2, HSQLDB, POSTGRES })
+    public static <T extends Number> DropSequenceFinalStep dropSequence(String sequence) {
+        return using(new DefaultConfiguration()).dropSequence(sequence);
+    }
+
     /**
      * Create a new DSL truncate statement.
      * <p>

jOOQ/src/main/java/org/jooq/impl/DefaultDSLContext.java

@@ -88,6 +88,7 @@ import org.jooq.DataType;
 import org.jooq.DeleteQuery;
 import org.jooq.DeleteWhereStep;
 import org.jooq.DropIndexFinalStep;
+import org.jooq.DropSequenceFinalStep;
 import org.jooq.DropTableStep;
 import org.jooq.ExecuteContext;
 import org.jooq.ExecuteListener;
@@ -1612,6 +1613,16 @@ public class DefaultDSLContext implements DSLContext, Serializable {
         return new DropIndexImpl(configuration, index);
     }
 
+    @Override
+    public DropSequenceFinalStep dropSequence(Sequence<?> sequence) {
+        return new DropSequenceImpl(configuration, sequence);
+    }
+
+    @Override
+    public DropSequenceFinalStep dropSequence(String sequence) {
+        return dropSequence(sequence(sequence));
+    }
+
     @Override
     public <R extends Record> TruncateIdentityStep<R> truncate(Table<R> table) {
         return new TruncateImpl<R>(configuration, table);

jOOQ/src/main/java/org/jooq/impl/DropSequenceImpl.java

@@ -0,0 +1,91 @@
+/**
+ * Copyright (c) 2009-2014, Data Geekery GmbH (http://www.datageekery.com)
+ * All rights reserved.
+ *
+ * This work is dual-licensed
+ * - under the Apache Software License 2.0 (the "ASL")
+ * - under the jOOQ License and Maintenance Agreement (the "jOOQ License")
+ * =============================================================================
+ * You may choose which license applies to you:
+ *
+ * - If you're using this work with Open Source databases, you may choose
+ *   either ASL or jOOQ License.
+ * - If you're using this work with at least one commercial database, you must
+ *   choose jOOQ License
+ *
+ * For more information, please visit http://www.jooq.org/licenses
+ *
+ * Apache Software License 2.0:
+ * -----------------------------------------------------------------------------
+ * Licensed 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.
+ *
+ * jOOQ License and Maintenance Agreement:
+ * -----------------------------------------------------------------------------
+ * Data Geekery grants the Customer the non-exclusive, timely limited and
+ * non-transferable license to install and use the Software under the terms of
+ * the jOOQ License and Maintenance Agreement.
+ *
+ * This library is distributed with a LIMITED WARRANTY. See the jOOQ License
+ * and Maintenance Agreement for more details: http://www.jooq.org/licensing
+ */
+package org.jooq.impl;
+
+import static org.jooq.Clause.DROP_SEQUENCE;
+import static org.jooq.Clause.DROP_SEQUENCE_SEQUENCE;
+
+import org.jooq.Clause;
+import org.jooq.Configuration;
+import org.jooq.Context;
+import org.jooq.DropSequenceFinalStep;
+import org.jooq.Sequence;
+
+/**
+ * @author Lukas Eder
+ */
+class DropSequenceImpl extends AbstractQuery implements
+
+    // Cascading interface implementations for DROP SEQUENCE behaviour
+    DropSequenceFinalStep {
+
+    /**
+     * Generated UID
+     */
+    private static final long     serialVersionUID = 8904572826501186329L;
+    private static final Clause[] CLAUSES          = { DROP_SEQUENCE };
+
+    private final Sequence<?>     sequence;
+
+    DropSequenceImpl(Configuration configuration, Sequence<?> sequence) {
+        super(configuration);
+
+        this.sequence = sequence;
+    }
+
+    // ------------------------------------------------------------------------
+    // XXX: QueryPart API
+    // ------------------------------------------------------------------------
+
+    @Override
+    public final void accept(Context<?> ctx) {
+        ctx.keyword("drop sequence")
+           .sql(" ")
+           .start(DROP_SEQUENCE_SEQUENCE)
+           .visit(sequence)
+           .end(DROP_SEQUENCE_SEQUENCE);
+    }
+
+    @Override
+    public final Clause[] clauses(Context<?> ctx) {
+        return CLAUSES;
+    }
+}

jOOQ/src/test/java/org/jooq/test/VisitContextTest.java

@@ -70,6 +70,8 @@ import static org.jooq.Clause.DELETE;
 import static org.jooq.Clause.DELETE_DELETE;
 import static org.jooq.Clause.DELETE_WHERE;
 import static org.jooq.Clause.DROP_INDEX;
+import static org.jooq.Clause.DROP_SEQUENCE;
+import static org.jooq.Clause.DROP_SEQUENCE_SEQUENCE;
 import static org.jooq.Clause.DROP_TABLE;
 import static org.jooq.Clause.DROP_TABLE_TABLE;
 import static org.jooq.Clause.FIELD;
@@ -776,6 +778,17 @@ public class VisitContextTest extends AbstractTest {
         ctx.alterSequence("seq").restart());
     }
 
+    @Test
+    public void test_DROP_SEQUENCE() {
+        assertEvents(asList(
+            asList(DROP_SEQUENCE),
+            asList(DROP_SEQUENCE, DROP_SEQUENCE_SEQUENCE),
+            asList(DROP_SEQUENCE, DROP_SEQUENCE_SEQUENCE, SEQUENCE),
+            asList(DROP_SEQUENCE, DROP_SEQUENCE_SEQUENCE, SEQUENCE, SEQUENCE_REFERENCE)
+        ),
+        ctx.dropSequence("i"));
+    }
+
     @Test
     public void test_ALTER_TABLE_ADD() {
         assertEvents(asList(