Add SPI to customize expression optimization

presto-spi/src/main/java/com/facebook/presto/spi/CoordinatorPlugin.java

@@ -16,13 +16,16 @@
 import com.facebook.presto.spi.function.FunctionNamespaceManagerFactory;
 import com.facebook.presto.spi.plan.PlanCheckerProviderFactory;
 import com.facebook.presto.spi.session.WorkerSessionPropertyProviderFactory;
+import com.facebook.presto.spi.sql.planner.ExpressionOptimizerFactory;
 
 import static java.util.Collections.emptyList;
 
 /**
- * The {@link CoordinatorPlugin} interface allows for plugins to provide additional functionality
- * specifically for a coordinator in a Presto cluster. This is a successor to {@link Plugin} for
- * coordinator specific plugins and will eventually replace it.
+ * Introduces a new {@link CoordinatorPlugin} interface for native C++ clusters.
+ * Certain elements of the {@link Plugin} SPI are not used in Prestissimo deployments, or may result in inconsistencies.
+ * The {@link CoordinatorPlugin} includes only the interfaces relevant to native C++ clusters and
+ * is a successor to {@link Plugin} and will eventually replace it.
+ * It contains only interfaces that are valid and used in a coordinator.
  */
 public interface CoordinatorPlugin
 {
@@ -40,4 +43,9 @@ default Iterable<PlanCheckerProviderFactory> getPlanCheckerProviderFactories()
     {
         return emptyList();
     }
+
+    default Iterable<ExpressionOptimizerFactory> getExpressionOptimizerFactories()
+    {
+        return emptyList();
+    }
 }

presto-spi/src/main/java/com/facebook/presto/spi/sql/planner/ExpressionOptimizerContext.java

@@ -0,0 +1,49 @@
+/*
+ * 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.
+ */
+package com.facebook.presto.spi.sql.planner;
+
+import com.facebook.presto.spi.NodeManager;
+import com.facebook.presto.spi.function.FunctionMetadataManager;
+import com.facebook.presto.spi.function.StandardFunctionResolution;
+
+import static java.util.Objects.requireNonNull;
+
+public class ExpressionOptimizerContext
+{
+    private final NodeManager nodeManager;
+    private final FunctionMetadataManager functionMetadataManager;
+    private final StandardFunctionResolution functionResolution;
+
+    public ExpressionOptimizerContext(NodeManager nodeManager, FunctionMetadataManager functionMetadataManager, StandardFunctionResolution functionResolution)
+    {
+        this.nodeManager = requireNonNull(nodeManager, "nodeManager is null");
+        this.functionMetadataManager = requireNonNull(functionMetadataManager, "functionMetadataManager is null");
+        this.functionResolution = requireNonNull(functionResolution, "functionResolution is null");
+    }
+
+    public NodeManager getNodeManager()
+    {
+        return nodeManager;
+    }
+
+    public FunctionMetadataManager getFunctionMetadataManager()
+    {
+        return functionMetadataManager;
+    }
+
+    public StandardFunctionResolution getFunctionResolution()
+    {
+        return functionResolution;
+    }
+}

presto-spi/src/main/java/com/facebook/presto/spi/sql/planner/ExpressionOptimizerFactory.java

@@ -0,0 +1,25 @@
+/*
+ * 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.
+ */
+package com.facebook.presto.spi.sql.planner;
+
+import com.facebook.presto.spi.relation.ExpressionOptimizer;
+
+import java.util.Map;
+
+public interface ExpressionOptimizerFactory
+{
+    ExpressionOptimizer createOptimizer(Map<String, String> config, ExpressionOptimizerContext context);
+
+    String getName();
+}