Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.stsci.edu/instruments/observatory/cdbs/image/recreate_load_file.ps Äàòà èçìåíåíèÿ: Tue Sep 16 18:41:23 1997 Äàòà èíäåêñèðîâàíèÿ: Sun Mar 2 09:35:30 2014 Êîäèðîâêà: Ïîèñêîâûå ñëîâà: comet tail

recreate load file
Rick Whitman
November 27, 1996
Usage
The tool is invoked by entering recreate load file on the command line followed
by one argument which is a reference file name. For example:
recreate—load—file a3d1145dy.cy0
There are also two environment variables that must be defined in order for the
tool to perform some database actions using OpenSTDB. These environment
variables are:
ffl CDBS SERVER ­ set to the database server name (in uppercase)
ffl CDBS DB ­ set to the CDBS database name (in lowercase)
The output will be a single load file named the same as the input reference file
name but with the extension ``.lod''. For example:
a3d1145dy.lod
This file can be used simply as a reference or can be edited to update the com­
ments. Then it can be used with the comments sql gen to update the comments
in the database.
The tool will also output a line indicating the input file currently being processed
and then the name of the output file produced to stdout.
Processing file A3D1145DY.CY0...
Load file: a3d1145dy.lod has been generated
It will also write messages indicating errors, if they occur, to stdout. Upon
detection of an error the task is terminated.
Algorithm/Module Description
The tool consists of a single file with several functions. It also calls functions
from the loadutils library and the OpenSTDB library. The following steps are
performed:

ffl The GetInst function is called to determine which instrument the reference
file is associated with. This is accomplished by getting the last character
in the file name before the ``.'' or `` ''. This character is then used to
query the instrument abbreviations table in the database and return the
instrument name. The file­level and row­level table names are determined
from the instrument name.
ffl The GetPutFileLevel function is called to query the file­level table for the
values associated with the reference file and output them to the load file.
ffl The GetPutRowLevel function is called to query the row­level table for
the values associated with the reference file and output them to the load
file.
-- This function first calls the GetModes function to determine which
modes are used in this particular reference file type. It does this by
querying the cdbs mode database table with the given instrument
and reference file type.
-- Then the row­level table for the instrument is queried for the keyword
values associated with the reference file.
-- For each row­level row retrieved, the GetChangeLevel function is
called to determine the CHANGE LEVEL value for the load file.
This is done by querying the row­level table for the equivalence class
associated with the comparison file. Those values are then compared
to the equivalence class values for the file being processed to deter­
mine a level of SEVERE, MODERATE or TRIVIAL.
Testing
The test script recreate load file.sh is available to test the recreate load file tool.
The test script is invoked by entering its name. It is assumed that you are
running the script from the cdbs/test/script directory and that your data is in
the cdbs/test/data directory and that the cdbs/test/data/tmp directory exists.
The script uses following files:
ffl u­init­y.lod ­ this file is an example of an initial unexpanded fos load file.
It loads data for the file: u­init­y.cy0
ffl u­next­y.lod ­ this is an unexpanded fos load which uses u­init­y as its refer­
ence file. This will allow for testing the determination of the CHANGE LEVEL.
ffl e­init­y.lod ­ this file is an example of an initial expanded fos load file. It
loads data for the file: e­init­y.cy0
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ffl e­next­y.lod ­ this is an expanded fos load which uses e­init­y as its refer­
ence file. This will allow for testing the determination of the CHANGE LEVEL.
Note that these files are not intended to be accurate examples of CDBS load
files but are only intended to demonstrate the various program paths.
The following steps will take place during the test:
ffl cdbs sql gen will be run on all of the files to generate SQL for loading the
database. The SQL will then be executed to do the inserts.
ffl recreate load file will be run for each of the reference files to regenerate
the load files in the cdbs/test/data/tmp directory.
ffl The new load file in the cdbs/test/data/tmp directory will be differenced
with the original load files in the cdbs/test/data directory. There should
be no differences.
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