Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/22379#discussion_r224629713
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/csv/CSVUtils.scala ---
@@ -0,0 +1,57 @@
+/*
+ * 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.spark.sql.catalyst.csv
+
+object CSVUtils {
+ /**
+ * Filter ignorable rows for CSV iterator (lines empty and starting with
`comment`).
+ * This is currently being used in CSV reading path and CSV schema
inference.
+ */
+ def filterCommentAndEmpty(iter: Iterator[String], options: CSVOptions):
Iterator[String] = {
+ iter.filter { line =>
+ line.trim.nonEmpty && !line.startsWith(options.comment.toString)
--- End diff --
The same comment here.
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