[
https://issues.apache.org/jira/browse/DRILL-7278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16854855#comment-16854855
]
ASF GitHub Bot commented on DRILL-7278:
---------------------------------------
arina-ielchiieva commented on pull request #1797: DRILL-7278: Refactor result
set loader projection mechanism
URL: https://github.com/apache/drill/pull/1797#discussion_r289938151
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/scan/project/projSet/ProjectedReadColumn.java
##########
@@ -0,0 +1,78 @@
+/*
+ * 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.physical.impl.scan.project.projSet;
+
+import org.apache.drill.exec.physical.rowSet.ProjectionSet;
+import org.apache.drill.exec.physical.rowSet.project.ProjectionType;
+import
org.apache.drill.exec.physical.rowSet.project.RequestedTuple.RequestedColumn;
+import org.apache.drill.exec.record.metadata.ColumnMetadata;
+import org.apache.drill.exec.vector.accessor.convert.ColumnConversionFactory;
+
+/**
+ * Projected column. Includes at least the reader schema. May also
+ * include projection specification, and output schema and a type
+ * conversion.
+ */
+
+public class ProjectedReadColumn extends AbstractReadColProj {
+ private final RequestedColumn requestedCol;
+ private final ColumnMetadata outputSchema;
+ private final ColumnConversionFactory conversionFactory;
+
+ public ProjectedReadColumn(ColumnMetadata readSchema) {
+ this(readSchema, null, null, null);
+ }
+
+ public ProjectedReadColumn(ColumnMetadata readSchema,
+ RequestedColumn requestedCol) {
+ this(readSchema, requestedCol, null, null);
+ }
+
+ public ProjectedReadColumn(ColumnMetadata readSchema,
+ ColumnMetadata outputSchema, ColumnConversionFactory conversionFactory) {
+ this(readSchema, null, outputSchema, null);
+ }
+
+ public ProjectedReadColumn(ColumnMetadata readSchema,
+ RequestedColumn requestedCol, ColumnMetadata outputSchema,
+ ColumnConversionFactory conversionFactory) {
+ super(readSchema);
+ this.requestedCol = requestedCol;
+ this.outputSchema = outputSchema;
+ this.conversionFactory = conversionFactory;
+ }
+
+ @Override
+ public ColumnMetadata providedSchema() {
+ return outputSchema == null ? readSchema : outputSchema;
+ }
+
+ @Override
+ public ProjectionSet mapProjection() {
+ // Should never occur: maps should use the map class.
+ return null;
Review comment:
May be thrown an error instead? Or null will be handled somewhere if
occurred?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
> Refactor result set loader projection mechanism
> -----------------------------------------------
>
> Key: DRILL-7278
> URL: https://issues.apache.org/jira/browse/DRILL-7278
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.16.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Major
> Fix For: 1.17.0
>
>
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
