[
https://issues.apache.org/jira/browse/DRILL-7253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16917577#comment-16917577
]
ASF GitHub Bot commented on DRILL-7253:
---------------------------------------
ihuzenko commented on pull request #1847: DRILL-7253: Read Hive struct w/o nulls
URL: https://github.com/apache/drill/pull/1847#discussion_r318470982
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/impl/SpecialFunctions.java
##########
@@ -0,0 +1,65 @@
+/*
+ * 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.expr.fn.impl;
+
+import org.apache.drill.exec.expr.DrillSimpleFunc;
+import org.apache.drill.exec.expr.annotations.FunctionTemplate;
+import org.apache.drill.exec.expr.annotations.Output;
+import org.apache.drill.exec.expr.annotations.Param;
+import org.apache.drill.exec.vector.complex.reader.FieldReader;
+import org.apache.drill.exec.vector.complex.writer.BaseWriter;
+
+/**
+ * Container class for functions with {@link
org.apache.calcite.sql.SqlSyntax#SPECIAL} syntax.
+ */
+public class SpecialFunctions {
+
+ private SpecialFunctions() {
+ }
+
+ /**
+ * Implementation of ROW(col1, col2, ..., colN) constructor function. Most
often it's
+ * used to reconstruct struct columns after Calcite's flattening.
+ */
+ @FunctionTemplate(name = "row", scope =
FunctionTemplate.FunctionScope.SIMPLE, isVarArg = true)
Review comment:
ROW(...) always was available to user, but previously it didn't group
arguments into struct type. Returned result was row with column value per
argument, now it's one column of type struct.
----------------------------------------------------------------
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
> Read Hive struct w/o nulls
> --------------------------
>
> Key: DRILL-7253
> URL: https://issues.apache.org/jira/browse/DRILL-7253
> Project: Apache Drill
> Issue Type: Sub-task
> Reporter: Igor Guzenko
> Assignee: Igor Guzenko
> Priority: Major
> Fix For: 1.17.0
>
>
--
This message was sent by Atlassian Jira
(v8.3.2#803003)
