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https://issues.apache.org/jira/browse/HAWQ-1119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15623625#comment-15623625
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ASF GitHub Bot commented on HAWQ-1119:
--------------------------------------
Github user dyozie commented on a diff in the pull request:
https://github.com/apache/incubator-hawq-docs/pull/46#discussion_r85793349
--- Diff: pxf/HDFSWritablePXF.html.md.erb ---
@@ -0,0 +1,410 @@
+---
+title: Writing Data to HDFS
+---
+
+The PXF HDFS plug-in supports writable external tables using the
`HdfsTextSimple` and `SequenceWritable` profiles. You might create a writable
table to export data from a HAWQ internal table to HDFS.
+
+This section describes how to use these PXF profiles to create writable
external tables.
+
+**Note**: You cannot directly query data in a HAWQ writable table. After
creating the external writable table, you must create a HAWQ readable external
table accessing the HDFS file, then query that table. ??You can also create a
Hive table to access the HDFS file.??
+
+## <a id="pxfwrite_prereq"></a>Prerequisites
+
+Before working with HDFS file data using HAWQ and PXF, ensure that:
+
+- The HDFS plug-in is installed on all cluster nodes. See [Installing
PXF Plug-ins](InstallPXFPlugins.html) for PXF plug-in installation information.
+- All HDFS users have read permissions to HDFS services and that write
permissions have been restricted to specific users.
+
+## <a id="hdfsplugin_writeextdata"></a>Writing to PXF External Tables
+The PXF HDFS plug-in supports writable two profiles: `HdfsTextSimple` and
`SequenceWritable`.
+
+Use the following syntax to create a HAWQ external writable table
representing HDFS data:
+
+``` sql
+CREATE EXTERNAL WRITABLE TABLE <table_name>
+ ( <column_name> <data_type> [, ...] | LIKE <other_table> )
+LOCATION ('pxf://<host>[:<port>]/<path-to-hdfs-file>
+
?PROFILE=HdfsTextSimple|SequenceWritable[&<custom-option>=<value>[...]]')
+FORMAT '[TEXT|CSV|CUSTOM]' (<formatting-properties>);
+```
+
+HDFS-plug-in-specific keywords and values used in the [CREATE EXTERNAL
TABLE](../reference/sql/CREATE-EXTERNAL-TABLE.html) call are described in the
table below.
+
+| Keyword | Value |
+|-------|-------------------------------------|
+| \<host\>[:\<port\>] | The HDFS NameNode and port. |
+| \<path-to-hdfs-file\> | The path to the file in the HDFS data store. |
+| PROFILE | The `PROFILE` keyword must specify one of the values
`HdfsTextSimple` or `SequenceWritable`. |
+| \<custom-option\> | \<custom-option\> is profile-specific. These
options are discussed in the next topic.|
+| FORMAT 'TEXT' | Use '`TEXT`' `FORMAT` with the `HdfsTextSimple` profile
when \<path-to-hdfs-file\> will reference a plain text delimited file. The
`HdfsTextSimple` '`TEXT`' `FORMAT` supports only the built-in
`(delimiter=<delim>)` \<formatting-property\>. |
--- End diff --
Change the wording of this row and the next to something like: Use
'`TEXT`' `FORMAT` with the `HdfsTextSimple` profile to create a
plain-text-delimited file at the specified \<path-to-hdfs-file\>.
(same for CSV)
> create new documentation topic for PXF writable profiles
> --------------------------------------------------------
>
> Key: HAWQ-1119
> URL: https://issues.apache.org/jira/browse/HAWQ-1119
> Project: Apache HAWQ
> Issue Type: Improvement
> Components: Documentation
> Reporter: Lisa Owen
> Assignee: David Yozie
> Fix For: 2.0.1.0-incubating
>
>
> certain profiles supported by the existing PXF plug-ins support writable
> tables. create some documentation content for these profiles.
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