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https://issues.apache.org/jira/browse/DRILL-5323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15948231#comment-15948231
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ASF GitHub Bot commented on DRILL-5323:
---------------------------------------
Github user sohami commented on a diff in the pull request:
https://github.com/apache/drill/pull/785#discussion_r108761814
--- Diff:
exec/java-exec/src/test/java/org/apache/drill/test/rowSet/SchemaBuilder.java ---
@@ -0,0 +1,138 @@
+/*
+ * 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.test.rowSet;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.drill.common.types.TypeProtos.DataMode;
+import org.apache.drill.common.types.TypeProtos.MajorType;
+import org.apache.drill.common.types.TypeProtos.MinorType;
+import org.apache.drill.exec.record.BatchSchema;
+import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
+import org.apache.drill.exec.record.MaterializedField;
+
+/**
+ * Builder of a row set schema expressed as a list of materialized
+ * fields. Optimized for use when creating schemas by hand in tests.
+ * <p>
+ * Example usage to create the following schema: <br>
+ * <tt>(c: INT, a: MAP(c: VARCHAR, d: INT, e: MAP(f: VARCHAR), g: INT), h:
BIGINT)</tt>
--- End diff --
... a: MAP(_b: VARCHAR_ .. instead of _c:VARCHAR_
> Provide test tools to create, populate and compare row sets
> -----------------------------------------------------------
>
> Key: DRILL-5323
> URL: https://issues.apache.org/jira/browse/DRILL-5323
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Tools, Build & Test
> Affects Versions: 1.11.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Fix For: 1.11.0
>
>
> Operators work with individual row sets. A row set is a collection of records
> stored as column vectors. (Drill uses various terms for this concept. A
> record batch is a row set with an operator implementation wrapped around it.
> A vector container is a row set, but with much functionality left as an
> exercise for the developer. And so on.)
> To simplify tests, we need a {{TestRowSet}} concept that wraps a
> {{VectorContainer}} and provides easy ways to:
> * Define a schema for the row set.
> * Create a set of vectors that implement the schema.
> * Populate the row set with test data via code.
> * Add an SV2 to the row set.
> * Pass the row set to operator components (such as generated code blocks.)
> * Compare the results of the operation with an expected result set.
> * Dispose of the underling direct memory when work is done.
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