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https://issues.apache.org/jira/browse/DRILL-4576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15239436#comment-15239436
]
ASF GitHub Bot commented on DRILL-4576:
---------------------------------------
Github user jacques-n commented on a diff in the pull request:
https://github.com/apache/drill/pull/466#discussion_r59570591
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/PlannerCallback.java
---
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.drill.exec.planner;
+
+import java.util.Collection;
+
+import org.apache.calcite.plan.RelOptPlanner;
+
+/**
+ * A callback that StoragePlugins can initialize to allow further
configuration
+ * of the Planner at initialization time. Examples could be to allow
adding lattices,
+ * materializations or additional traits to the planner that will be used
in
+ * planning.
+ */
+public abstract class PlannerCallback {
+
+ /**
+ * Method that will be called before a planner is used to further
configure the planner.
+ * @param planner The planner to be configured.
+ */
+ public abstract void initializePlanner(RelOptPlanner planner);
+
+
+ public static PlannerCallback merge(Collection<PlannerCallback>
callbacks){
--- End diff --
Probably has to do with whether Eclipse cleans up my formatting. We should
have checkstyles for these things. Let's try to do something with v2 so we
remove this inconsistency from the code.
> Add StoragePlugin API to register materialization into planner
> --------------------------------------------------------------
>
> Key: DRILL-4576
> URL: https://issues.apache.org/jira/browse/DRILL-4576
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Laurent Goujon
> Assignee: Jacques Nadeau
>
> There's no currently a good way to register materializations into Drill
> planner. Calcite's MaterializationService.instance() would be the way to go,
> but the registration happens in
> {{org.apache.calcite.prepare.Prepare.PreparedResult#prepareSql()}}, which is
> not called by Drill.
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