| layout | title | displayTitle | license |
|---|---|---|---|
global |
Text Files |
Text Files |
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.
|
Spark SQL provides spark.read().text("file_name") to read a file or directory of text files into a Spark DataFrame, and dataframe.write().text("path") to write to a text file. When reading a text file, each line becomes each row that has string "value" column by default. The line separator can be changed as shown in the example below. The option() function can be used to customize the behavior of reading or writing, such as controlling behavior of the line separator, compression, and so on.
{% include_example text_dataset scala/org/apache/spark/examples/sql/SQLDataSourceExample.scala %}
{% include_example text_dataset java/org/apache/spark/examples/sql/JavaSQLDataSourceExample.java %}
{% include_example text_dataset python/sql/datasource.py %}
Data source options of text can be set via:
- the
.option/.optionsmethods ofDataFrameReaderDataFrameWriterDataStreamReaderDataStreamWriter
OPTIONSclause at CREATE TABLE USING DATA_SOURCE
| Property Name | Default | Meaning | Scope |
|---|---|---|---|
wholetext |
false |
If true, read each file from input path(s) as a single row. | read |
lineSep |
\r, \r\n, \n (for reading), \n (for writing) |
Defines the line separator that should be used for reading or writing. | read/write |
compression |
(none) | Compression codec to use when saving to file. This can be one of the known case-insensitive shorten names (none, bzip2, gzip, lz4, snappy and deflate). | write |