[#4919] Add support for CREATE INDEX .. WHERE in SQL Server (filtered indexes)

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

@@ -70,11 +70,11 @@ public interface CreateIndexStep {
      * Specify the table and column expressions on which to create an index.
      */
     @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES, SQLITE })
-    CreateIndexFinalStep on(Table<?> table, Field<?>... fields);
+    CreateIndexWhereStep on(Table<?> table, Field<?>... fields);
 
     /**
      * Specify the table and column expressions on which to create an index.
      */
     @Support({ CUBRID, DERBY, FIREBIRD, H2, HSQLDB, MARIADB, MYSQL, POSTGRES, SQLITE })
-    CreateIndexFinalStep on(String tableName, String... fieldNames);
+    CreateIndexWhereStep on(String tableName, String... fieldNames);
 }

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

@@ -0,0 +1,137 @@
+/**
+ * Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * Other licenses:
+ * -----------------------------------------------------------------------------
+ * Commercial licenses for this work are available. These replace the above
+ * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
+ * database integrations.
+ *
+ * For more information, please visit: http://www.jooq.org/licenses
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ */
+package org.jooq;
+
+// ...
+
+import java.util.Collection;
+
+import org.jooq.impl.DSL;
+
+/**
+ * A {@link Query} that can create indexes.
+ *
+ * @author Lukas Eder
+ */
+public interface CreateIndexWhereStep extends CreateIndexFinalStep {
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+}

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

@@ -54,14 +54,18 @@ import static org.jooq.impl.DSL.field;
 import static org.jooq.impl.DSL.name;
 import static org.jooq.impl.DSL.table;
 
+import java.util.Collection;
+
 import org.jooq.Clause;
+import org.jooq.Condition;
 import org.jooq.Configuration;
 import org.jooq.Context;
-import org.jooq.CreateIndexFinalStep;
 import org.jooq.CreateIndexStep;
+import org.jooq.CreateIndexWhereStep;
 import org.jooq.Field;
 import org.jooq.Name;
 import org.jooq.QueryPart;
+import org.jooq.SQL;
 import org.jooq.Table;
 
 /**
@@ -71,7 +75,7 @@ final class CreateIndexImpl extends AbstractQuery implements
 
     // Cascading interface implementations for CREATE INDEX behaviour
     CreateIndexStep,
-    CreateIndexFinalStep {
+    CreateIndexWhereStep {
 
     /**
      * Generated UID
@@ -85,6 +89,9 @@ final class CreateIndexImpl extends AbstractQuery implements
     private Table<?>              table;
     private Field<?>[]            fields;
 
+
+
+
     CreateIndexImpl(Configuration configuration, Name index, boolean unique, boolean ifNotExists) {
         super(configuration);
 
@@ -98,7 +105,7 @@ final class CreateIndexImpl extends AbstractQuery implements
     // ------------------------------------------------------------------------
 
     @Override
-    public final CreateIndexFinalStep on(Table<?> t, Field<?>... f) {
+    public final CreateIndexImpl on(Table<?> t, Field<?>... f) {
         this.table = t;
         this.fields = f;
 
@@ -106,7 +113,7 @@ final class CreateIndexImpl extends AbstractQuery implements
     }
 
     @Override
-    public final CreateIndexFinalStep on(String tableName, String... fieldNames) {
+    public final CreateIndexImpl on(String tableName, String... fieldNames) {
         Field<?>[] f = new Field[fieldNames.length];
 
         for (int i = 0; i < f.length; i++)
@@ -115,6 +122,45 @@ final class CreateIndexImpl extends AbstractQuery implements
         return on(table(name(tableName)), f);
     }
 
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     // ------------------------------------------------------------------------
     // XXX: QueryPart API
     // ------------------------------------------------------------------------
@@ -160,6 +206,11 @@ final class CreateIndexImpl extends AbstractQuery implements
            .visit(new QueryPartList<QueryPart>(fields))
            .qualify(true)
            .sql(')');
+
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     }
 
     @Override