**************************************************************************
ABOUT THE HAWQ GPFDIST TRANSFORM DEMOS
**************************************************************************

This package contains example programs of HAWQ gpfdist transformations:

1. dblp - This example demonstrates loading and extracting 
          database research data.
       
          Specification File: 1_dblp.yaml
	  Config Files:       config.yaml
          Data Files:         data/dblp.xml (downloaded)


2. mef  - Example loading IRS Modernized eFile format data
       
          Specification File: 2_mef.yaml
	  Config Files:       config.yaml
          Data Files:         data/RET990EZ_2006.xml


3. rig  - Example loading WITSML oil well data

          Specification File: 3_rig.yaml
	  Config Files:       config.yaml
          Data Files:         data/rig.xml (downloaded)

 
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BEFORE YOU BEGIN
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1. Download the demo data and jar files from www.cs.washington.edu,
   w3.energistics.org and sourceforge.net:

    $ cd data
    $ make

2. Create a database to use for the HAWQ gpfdist transform demos:

    $ createdb gptransform


**************************************************************************
RUNNING DEMO 1: input transformation via hawq load 
**************************************************************************

DBLP example
------------

1. Edit the 1_dblp.yaml file and change the LOCAL_HOSTNAME setting
   reflect the name of the host (e.g. myhostname) you where you will 
   run hawq load.

      LOCAL_HOSTNAME: [ myhostname ]

   HAWQ will attempt to connect to this host to access the data.


2. Create the dblp_thesis table

    $ psql -d gptransform -f dblp/create.sql


3. load the data

    $ hawq load -f 1_dblp.yaml


4. review some of the data

    $ psql -d gptransform -c "select * from dblp_thesis limit 5;"


MeF example
------------

5. Edit the 2_mef.yaml file and change the LOCAL_HOSTNAME setting
   reflect the name of the host (e.g. myhostname) you where you will 
   run hawq load.

      LOCAL_HOSTNAME: [ myhostname ]

   HAWQ will attempt to connect to this host to access the data.


6. Create the mef_xml table

    $ psql -d gptransform -f mef/create.sql


7. load the data

    $ hawq load -f 2_mef.yaml


8. review the data

    $ psql -d gptransform -c "select id, substring(text(doc) from 1 for 200) as doctext from mef_xml;"


WITSML example
--------------

9. Edit the 3_rig.yaml file and change the LOCAL_HOSTNAME setting
   reflect the name of the host (e.g. myhostname) you where you will 
   run hawq load.

      LOCAL_HOSTNAME: [ myhostname ]

   HAWQ will attempt to connect to this host to access the data.


10. Create the rig_xml table

    $ psql -d gptransform -f rig/create.sql


11. load the data

    $ hawq load -f 3_rig.yaml

12. review some data

    $ psql -d gptransform -c "select well_uid, well_name, rig_uid, rig_name, rig_owner from rig_xml;"


**************************************************************************
RUNNING DEMO 2: input/output transformations via gpfdist
**************************************************************************

1. Edit the dblp/external.sql file and change the location settings
   to reflect the name of the host (e.g. myhostname) you where you will 
   run gpfdist.

      location ('gpfdist://myhostname:8080/data/dblp.xml#transform=dblp_input') 

   HAWQ will attempt to connect to this host to read and write the data.


2. in a separate window, start gpfdist:

    $ gpfdist -c config.yaml

   in this example we run gpfdist in the foreground in a separate window
   until we're done.


3. Re-create the dblp_thesis table

    $ psql -d gptransform -f dblp/create.sql


4. Create readable and writable external tables

    $ psql -d gptransform -f dblp/external.sql


5. load the data

    $ psql -d gptransform -c "insert into dblp_thesis select * from dblp_thesis_readable;"


6. review some of the data

    $ psql -d gptransform -c "select * from dblp_thesis limit 5;"


7. extract the data

    $ psql -d gptransform -c "insert into dblp_thesis_writable select * from dblp_thesis;"

   This will create a file called 'data/out.dblp_thesis.xml'


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DEMO CLEANUP
**************************************************************************

After you have run the demos, run the following commands to clean up:

1. stop the gpfdist started in step 2 of DEMO 2.

    ^C
    $


2. drop the demo database

    $ dropdb gptransform


3. (optional) remove the downloaded files

    $ cd data
    $ make clean