[GitHub] [ignite] zstan commented on a change in pull request #9276: IGNITE-14307 Use statistics in cost model.

[GitBox <gi...@apache.org>]

zstan commented on a change in pull request #9276:
URL: https://github.com/apache/ignite/pull/9276#discussion_r699937811



##########
File path: modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/metadata/IgniteMdColumnOrigins.java
##########
@@ -0,0 +1,386 @@
+/*
+ * 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.ignite.internal.processors.query.calcite.metadata;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import org.apache.calcite.plan.RelOptTable;
+import org.apache.calcite.rel.RelNode;
+import org.apache.calcite.rel.core.Aggregate;
+import org.apache.calcite.rel.core.AggregateCall;
+import org.apache.calcite.rel.core.Calc;
+import org.apache.calcite.rel.core.Exchange;
+import org.apache.calcite.rel.core.Filter;
+import org.apache.calcite.rel.core.Join;
+import org.apache.calcite.rel.core.Project;
+import org.apache.calcite.rel.core.SetOp;
+import org.apache.calcite.rel.core.Sort;
+import org.apache.calcite.rel.core.TableFunctionScan;
+import org.apache.calcite.rel.core.TableModify;
+import org.apache.calcite.rel.metadata.BuiltInMetadata;
+import org.apache.calcite.rel.metadata.MetadataDef;
+import org.apache.calcite.rel.metadata.MetadataHandler;
+import org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider;
+import org.apache.calcite.rel.metadata.RelColumnMapping;
+import org.apache.calcite.rel.metadata.RelColumnOrigin;
+import org.apache.calcite.rel.metadata.RelMetadataProvider;
+import org.apache.calcite.rel.metadata.RelMetadataQuery;
+import org.apache.calcite.rex.RexCall;
+import org.apache.calcite.rex.RexInputRef;
+import org.apache.calcite.rex.RexLocalRef;
+import org.apache.calcite.rex.RexNode;
+import org.apache.calcite.rex.RexShuttle;
+import org.apache.calcite.rex.RexSlot;
+import org.apache.calcite.rex.RexVisitor;
+import org.apache.calcite.rex.RexVisitorImpl;
+import org.apache.calcite.util.BuiltInMethod;
+import org.apache.ignite.internal.processors.query.calcite.rel.ProjectableFilterableTableScan;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * RelMdColumnOrigins supplies a default implementation of
+ * {@link RelMetadataQuery#getColumnOrigins} for the standard logical algebra.
+ */
+public class IgniteMdColumnOrigins implements MetadataHandler<BuiltInMetadata.ColumnOrigin> {
+    /** */
+    public static final RelMetadataProvider SOURCE = ReflectiveRelMetadataProvider.reflectiveSource(
+            BuiltInMethod.COLUMN_ORIGIN.method, new IgniteMdColumnOrigins());
+
+    /** {@inheritDoc} */
+    @Override public MetadataDef<BuiltInMetadata.ColumnOrigin> getDef() {
+        return BuiltInMetadata.ColumnOrigin.DEF;
+    }
+
+    /** */
+    public @Nullable Set<RelColumnOrigin> getColumnOrigins(Aggregate rel, RelMetadataQuery mq, int iOutputColumn) {
+        if (iOutputColumn < rel.getGroupCount()) {
+            // get actual index of Group columns.
+            return mq.getColumnOrigins(rel.getInput(), rel.getGroupSet().asList().get(iOutputColumn));
+        }
+
+        // Aggregate columns are derived from input columns
+        AggregateCall call = rel.getAggCallList().get(iOutputColumn - rel.getGroupCount());
+
+        final Set<RelColumnOrigin> set = new HashSet<>();
+
+        for (Integer iInput : call.getArgList()) {
+            Set<RelColumnOrigin> inputSet = mq.getColumnOrigins(rel.getInput(), iInput);
+            inputSet = createDerivedColumnOrigins(inputSet);
+
+            if (inputSet != null)
+                set.addAll(inputSet);
+

Review comment:
       del it




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