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- History of DELIMIT _______
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- DELIMIT was created when a friend needed to do some budget _______
- analysis. The accounting reports were 100 pages long, and we
- needed to get the department totals into a spread sheet for
- analysis. There were 3 choices:
- 1) Ask the computer operators to create an ad hoc report in a
- difficult to use report writing system, and import it into
- the spread sheet. They were back logged, so it would have
- taken a couple of weeks, (and the next time the requirements
- would have been different, and we would have to wait weeks
- again.)
- 2) Import the entire report into the spread sheet, and delete
- the detail records. (the spread sheet couldn't handle that
- many lines).
- 3) Use a text editor to delete the detail lines, and then
- import it into the spread sheet. This would have been very
- tedious!
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- We tested parsing 1 page of the accounting report in a spread
- sheet program. Reading the text file was quick, but parsing it
- took a long time - it would have literally taken HOURS to parse
- the hundred pages of data we needed. We didn't need all the
- columns that were included on the report anyway.
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- DELIMIT v1.00 was created. We could INCLUDE the records we _______
- wanted and ignore the rest (Detail parm). We could also select
- the columns we wanted and ignore the others. The data was either
- text - surrounded by double quotes, (Character parm) or numbers
- (Number parm). What would have taken hours to parse took just a
- few minutes using DELIMIT. The spread sheet program could read _______
- the text file quickly, and the time consuming parse was not
- needed.
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- Several weeks later, we needed to do the same thing, but wanted
- all the detail records for a 20 page section of the report, not
- just the totals. There was no unique way to identify the detail
- records, but we could identify the records we didn't want. This
- is when the Header parm was added, to select records to EXCLUDE
- from the processing, and process the rest.
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- Somewhere along the line, someone else needed to DELIMIT a file, _______
- but their destination program didn't want text surrounded by
- double quotes. This is when the Move parameter was created, to
- select the text, but not surround it with double quotes.
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- Another person saw this and said, "this is great!, but why do I
- have to print the report first, why can't I just copy the data
- file from the mini computer?" This represented a two changes.
- The first change was that the source file was no longer a report.
- The data file from the mini was fixed format, with NO record
- separators. This is when the Length parm was created, to be able
- to read files with no record separators. The second problem was
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- that the records were longer than 255 characters. The input
- buffers can now work with records up to 4000 bytes.
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- During another project, we needed to bring a data file from a
- main frame tape, to a Macintosh (Mac). The Mac doesn't
- understand comma delimited files, it doesn't like double quotes
- or Carriage Return - Line Feed (CR-LF) for the record separator
- either. This produced the Separator parm, to be able to use any
- other character (or string) as a field separator. This also
- produced the Record separator parm, in able to use any other
- character (or string) as the record separator.
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- After explaining the program to someone, they said, "how can you
- understand what all those parm files mean?". This lead to the *
- comment parm, so parm files can be documented.
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- The latest project has been to acquire data from many diverse
- sources, and import it into a data base. One mainframe source
- could only supply data on large reel tape. The numeric fields
- were signed (the last position not a number it is a letter).
- This produced the Signed Numeric field.
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- It is faster to create one import program, and many DELIMIT parm _______
- files to create the format we need, than to continue to write new
- import programs for the data base. Also the research analysts
- don't want to program, but they love to DELIMIT. _______
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- FUTURE ENHANCEMENTS
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- - A constant parm, to add 'constant' data to every record.
- During one project, data is reformatted from a fixed format
- file to be imported into a spread sheet. For formatting
- purposes, the user wants to create blank columns. Currently
- we just select an area we know will be blank to give the
- empty field.
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- - A record count parm. Some data by its nature does not have
- unique keys. A record count parm could be used to create
- unique keys. Some data bases require a unique key for
- storage reasons.
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- - A prettier user interface.
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