JP2000047751A - Area non-expansion type anno domini four-digit adaptation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system capable of being shifted to the Anno Domini(A.D.) 4-digit system while guaranteeing data exceeding 100 years without varying the record length of a database of an A.D. low-order 2-digit system. SOLUTION: While usual operation is carried on, a conventional data-base has A.D. low-order two digits to A.D. four digits and a transient data base compressed into a conventional 6-byte area is ported to other parts of a magnetic disk or to an externally connected magnetic disk, and an operation confirmation test after the A.D. 4-digit shifting is conducted on the basis of the transient database to carry out the actual shifting and its operation confirming operation in usual operation hours without any hindrance to the daily operation. Then data having A.D. four-digit dates are compressed and converted to the original area to replace the conventional database.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to
When the data of the year 2000 is generated in the business system described in the digit, the business system may be erroneously operated or may not work. In order to solve the so-called year 2000 problem, the conventional database is used. Without changing the record length, blocking factor, file capacity, etc.
The present invention relates to a system compatible with the year 2000, in which a database is converted to a four-digit year of the Christian era (rarely, a date of the last three digits of the Christian era → later described) without changing the logic of the program as much as possible.

[0002]

2. Description of the Related Art Conventionally, systems that have been proposed as systems supporting the year 2000 are roughly classified into three systems: a system that supports four digits of the Christian era, a system that supports the last two digits of the Christian era, and a system that supports the Japanese calendar.
The second two-digit system corresponding to the last year of the Christian era is further divided into two systems, a year identification system and a base year system.

The first four-digit system corresponding to the Christian era is also referred to as an “area extension corresponding system”. The two-digit year of file data is expanded to four-digit year (eg, 99 → 1999, 00 → 2000), and the original Change the database. Naturally, the record length increases, and the work of correcting the blocking factor, file size, etc.
Although the entire system is modified, the content of the correction is a simple operation of changing (extending the number of digits) the definition part of the item corresponding to the database and the affected item, and thus has an advantage that it is not necessary to incorporate judgment or logic. The former two methods, which are included in the next two digits corresponding to the last year of the Christian era, are also referred to as threshold values. In other words, the file data remains the two digits of the year, and a boundary value is set to distinguish ages. (Example: 80-99 → 19
00s, 00-79 → 2000s). The latter base year method is also called a relative year correspondence method, and the data file has a two-digit year, sets the base year, and
Relative year by setting to “01” (example: 89 → 0)
1, ８９ 89-99 → 01-11, 00-88 → 12-
99) In the two systems of the two-digit system corresponding to the Christian era, it is necessary to incorporate logic so as to prevent inconsistency in subsequent calculations and judgment processing when performing the business. The last method for Japanese calendar year is 200
The zero-year problem is irrelevant, but there is concern about a date entry error in the unfamiliar Japanese calendar, and new measures must be taken every time the year changes.

[Problems to be Solved by the Invention] As described above, the conventional system for the year 2000, the year 4
3 digits, 3 digits of the year, 2 digits of the year, and 3
Regarding the method roughly divided into the correspondences, the first, four-digit correspondence in the Christian era, requires that changes in record length, blocking factors, etc. affect the entire system and increase the memory capacity and magnetic disk capacity. As a result, a problem concerning the addition of a memory or a magnetic disk may newly occur. On the other hand, the second two digits of the last year of the Christian era include two methods of a year discrimination method (corresponding to a threshold value) and a reference year method (corresponding to a relative year), and all of these measures exceed 100 years. If data exists in the range, there is a defect that cannot be processed. On the other hand, the third Japanese calendar correspondence has a serious flaw in terms of persistence as well as a risk of a date input error in an unfamiliar Japanese calendar.

[0004] The present invention has been made in view of such circumstances, and has as its object the purpose of
When dealing with the year, the database and file data should not change the record length, blocking factor, memory capacity, magnetic disk capacity, etc., so that the entire system would not be affected. (Rarely the last three digits of the Christian era).

The invention corresponding to claim 1 of the present application converts date data into the last two digits of the year, the two digits of the month, the two digits of the day,
In most current business systems that store a total of six digits of data, date data is described in zoned decimal numbers, so storing six digits in the last two digits of the Christian era requires six bytes. A total of eight digits for a four-digit date requires an eight-byte area. However, if it is described in packed decimal 10 format, 6
Even in the byte area, instead of 8 digits, 11 digits are
It can be stored. Therefore, in a traditional database,
The 6-byte area used for date data contains the year 4
It is even possible to add 3-digit information in addition to the digit date, and the day of the week information (numerical display: 1 = Month, 2 = Tue, 3 = Wed, 4 = Thu, 5 = Fri,
6 = sat, 7 = day) or undecided date information (start, completion, delivery, etc.), or may be left as a spare data area. In addition, from the last two digits of the Christian era (zone type decimal number) to the four digits of the Christian era (packed decimal number)
To modify the definition part of the item corresponding to the database and the affected item [Expansion of the number of digits and packed decimal description in the picture clause ... Example: PIC 9
(6) → PIC S9 (11) PACKED-DECI
Needless to say, it is not necessary to incorporate judgment and logic in the simple operation of [MAL].

[0005] The invention corresponding to claim 2 of the present application is directed to a packed decimal system that stores date data using a total of 6 digits including the last two digits of the year, two digits of the month, and two digits of the day using four bytes. , In the same 4-byte date data area, the last three digits of the year,
A total of seven digits, two digits for the month and two digits for the day, are stored in packed decimal numbers. This is to make full use of the original 7-digit date data area, which used only 6 digits. If a 4-digit date in the Christian era is put into a 4-byte area in packed decimal format,
Although the last three digits of the Christian era due to "digit overflow" occur, it is necessary to incorporate the date determination and processing logic.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an example of converting a lower two-digit year of a zoned decimal number into a four-digit year of the Christian era and storing the date in a packed decimal number. Last two digits of the year (eg, 980720/00121)
4) and add 1900000/20000000 to convert to 4-digit date (eg 19980720/20
[001214] Since the data is stored in the same date data area in a 6-byte packed decimal number, the record length of the database and the blocking factor do not need to be changed.

FIG. 2 is a diagram showing an example of a conversion method of date data having another meaning, such as a delivery date undecided, and is a 6-byte zone-decimal undecided date of the last two digits of the Christian era (eg:
0000000000) to 9990000000000, and 1
Since it is set to one digit to prevent a problem during sorting and stored in the same date data area as a 6-byte packed decimal number, the record length of the database and the blocking factor do not need to be changed.

FIG. 3 is a diagram illustrating a process of converting a zoned decimal lower two digit date into a Christian four digit date and storing the date in a packed decimal number.
Byte, last two digits of the year (eg, 980720/001)
214), and add 1900000/20000000 to convert to a 4-digit date (eg, 19980720/2)
0001214) and multiply the value by 10 (eg 19980)
7200/200012140), and further adds day of the week information (example: 1 = month / 3 = Wed) (example: 199807201)
/ 200012143), and stored in the same date data area in 6-byte packed decimal numbers, so there is no need to change the record length or blocking factor of the database.

FIG. 4 is a packed decimal number, which is a 4-byte last two-digit year of the Christian era (eg, 0980720/000121).
4), and add 1900000 or 20000000 to convert to a 4-digit date (eg, 19980720/20)
001214) Then, the same 4-byte date data area is replaced with a packed decimal number. As is clear from the figure, a 4-byte packed decimal number can store only a maximum of 7 digits, and an 8-digit year 4-digit date is "digit overflow" (eg, 19980720/20001).
214 → 9980720/0001214).
If the first three digits (eg, 998/000) are 961 or more, 19
If the system incorporates the logic of the 00's, 960's or less, 2000's into the system, the last three digits of the Christian era would be 19610101-2961231,
Until 2960, the current data can be used for the next 960 years,
The record length and the blocking factor do not need to be changed. However, regarding the picture phrase, PIC S9 (7) PACKE
D-DECIMAL or similar pack 1
Check that the 4-byte data area is secured.

FIG. 5 shows an example of a description of a service program “What is used as a key in a record for sorting” for a service program for sorting (sorting) data. From what number of bytes the key area starts from the beginning of the record (position) → Same designation in the present invention How long is the key area (length) → From zoned decimal to packed In the present invention in which the number of bytes does not change even when converted to decimal, the contents of the area designated as the same designation key are numbers, characters, or (data format) → PD ( Or P) Specify the order of the key areas (order) → A for ascending order, D for descending order. That is, the last two digits of the year (6 digits zoned decimal) are 4
Even if the number of digits (11-digit packed decimal) is reached, the length of the key remains unchanged, and the record layout does not change. Therefore, the key data type
The formula is converted from ZD (or D: zoned formula decimal) to PD
(Or P: packed decimal)
In the case of the last three digits of the Christian era, it is easy to guess that there is no need to modify the original.

FIG. 6 shows a state of performing a normal business in the conventional last two digits system of the Christian era. That is, input from a screen 1 such as a workstation, an optical character reader (OCR) / optical mark reader (OMR) 2, a floppy disk 3, and a magnetic tape 4 which are input devices for the last two digits of the Christian era. The data obtained and the database or file data exchanged with the other system 5, the magnetic disk 6, and the subroutine 7 are processed in various program languages 8 using the last two digits of the Christian era (data sorting using the date as a key item). And prepare a report list), and output the processing result to a screen 1 such as a workstation, a printer 9, a floppy disk 3, or a magnetic tape 4, which is an output device for the last two digits of the Christian era. And perform normal duties.

FIG. 7 shows a transitional operation of converting date data to a four-digit year in a two-digit year system. That is, it converts the database and file data stored in the magnetic disk 6 and the lower two digits of the Christian era included in the subroutine 7 into four digits of the Christian era. At this time, the conversion format of the database and file data stored on the magnetic disk 6 is a packed format in which the same 6-byte 11-digit number can be stored in the date data area which was 6 bytes in the original zoned decimal system. In principle, four digits of the Christian era are stored after being converted to decimal numbers. Therefore, before and after conversion, the number of data bytes does not change.
The record length and blocking factor are the same, and the magnetic disk capacity does not change. Note that the date data included in the subroutine 7 may be 8 bytes in zoned decimal notation as long as it does not affect the record layout even if the last two digits of the Christian era are converted to four digits of the Christian era.

FIG. 8 shows the work of performing the operation confirmation work of the new system of four digits of the Christian era. That is, a screen 1 such as a workstation, an optical character reading device (OCR) / an optical mark reading device (OM), which is an input device for four-digit year data.
R) The four-digit year data input from the floppy disk 3 and the like, the magnetic disk 6 that has been subjected to the four-digit conversion process, and the database and file data exchanged with the subroutine 7 are converted into four-digit years in various program languages 8. Using the digits as key items, rearrange the data or edit the report list of the four digits of the Christian era, and output the processing results to the screen 1, a printer 9, and the floppy disk 3, such as a workstation, which is the output device of the four digits of the Christian era. And output 4
Check the normal operation of the new girder system.

FIG. 9 shows a process for converting the last two digits of the Christian era into four digits of the Christian era, which is performed after the normal operation check of the new four-digit Christian era system is completed. That is, the magnetic tape 4
Is converted into a four-digit year (packed decimal number) using a magnetic disk 6 as a medium, and stores the status of a business partner using the last two digits of the year (zone type decimal number) stored in the database. Are stored in the magnetic tape 4.

FIG. 10 shows a full-fledged business operation of the new system of four digits of the Christian era. That is, a screen 1, such as a workstation, which is an input device for 4-digit year data, an optical character reading device (OCR) / an optical mark reading device (OMR)
2, data input from a floppy disk 3, etc., a magnetic tape 4, another system 5, a magnetic disk 6,
The database and file data exchanged with the subroutine 7 are processed by various language programs 8 using four digits of the Christian era (rearranging data using the date as a key item and preparing a form list). The processing result is output to the screen 1, such as a workstation, which is an output device of four-digit year data, a printer 9, a floppy disk 3, and a magnetic tape 4.

FIG. 11 shows a full-scale business operation of the new system of the last three digits of the Christian era. That is, a screen 1 of a workstation or the like, which is an input device for four-digit year data, an optical character reading device (OCR) / an optical mark reading device (OMR).
2. The data input from the floppy disk 3 or the like, which is the input operation of the last three digits of the Christian era, and the database and file data exchanged with the magnetic tape 4, the other system 5, the magnetic disk 6, and the subroutine 7, A processing using four digits of the Christian era in various language programs 8 (rearranging data using the date as a key item and preparing a form list) to output the four digits of the Christian era, such as a workstation, etc. Screen 1, printer 9,
The processing result is output to a floppy disk 3 or a magnetic tape 4 which is an output device for the last three digits of the Christian era. In other words, in the last three digits of the New Year system, four digits of the year are used for exchanging information with people, such as the screen 1 of a workstation, various reading devices 2, and a form list 9, and the last three digits of the year are used for data processing. Make full use of it.

As described above in detail, according to the invention corresponding to claim 1 of the present application, the record length, the blocking factor, the file capacity, the magnetic disk capacity, and the like of the conventional database and file data of the last two digits of the Christian era. Is converted to a four-digit AD database or file data as it is (without expanding the data area), thereby providing a method corresponding to the year 2000 problem. Therefore, even in a system in which it is difficult to increase the memory capacity and inevitably has forgotten to support the so-called 4-digit year system, the present invention, which is a non-expandable memory-area 4-digit year system, deserves to be fully reviewed and applied. .

According to the invention corresponding to claim 2 of the present application, the record length of the database and file data, the blocking factor, the file capacity, the magnetic disk capacity, etc. of the last two digits of the Christian era are kept as they are (data Area not expanded)
Thus, it is possible to provide a system corresponding to the year 2000 problem by converting the data into a database or data file of the last three digits of the Christian era.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram showing conversion of a lower-order two-digit zoned decimal number 6 bytes into a Christian four-digit number and storing it as a packed decimal number 6 bytes.

FIG. 2 is a diagram showing that date data having a special meaning, such as a delivery date undecided (000000), is converted into 9990000000000 and stored as packed decimal 6 bytes.

FIG. 3 is a diagram showing that lower 6 digits of the year 2 zoned decimal 6 bytes are converted to 4 digits of the Christian era, the value is multiplied by 10, the day of the week information is added, and the packed decimal 6 bytes are stored. .

FIG. 4 is a diagram showing that two-digit lower decimal digits of the year 4 are converted into four-digit years in the Christian era, and the packed decimal four-byte area is stored again to store the lower three-digit date of the year due to “digit overflow”. It is.

FIG. 5 is a diagram showing an example of a change in a SORT job control statement accompanying a system transfer from the last two digits of the Christian era to four digits of the Christian era.

FIG. 6 is a diagram showing the execution of conventional ordinary business using the last two digits of the Christian era.

FIG. 7 is a diagram showing a transitional intermediate operation for converting the last two digits of the Christian era to four digits of the Christian era.

FIG. 8 is a diagram showing execution of operation confirmation work of a new system after conversion into four digits of the Christian era.

FIG. 9 is a diagram illustrating a final operation of converting database and file data from the last two digits of the Christian era to four digits of the Christian era.

FIG. 10 is a diagram showing execution of a full-scale business by the new system of four digits of the Christian era.

FIG. 11 is a diagram showing the execution of a full-scale business by the new system of the last three digits of the Christian era.

[Explanation of symbols]

Reference Signs List 1 Screen of workstation etc. 2 Optical character reader (OCR) / optical mark reader (OMR) 3 Floppy disk 4 Magnetic tape 5 Other system 6 Magnetic disk 7 Subroutine 8 Various programming languages 9 Printer device

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 12, 1998 (1998.10.
12)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 5

[Correction method] Change

[Correction contents]

FIG. 5 ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 5, 1998 (1998.11.
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005] The invention corresponding to claim 2 of the present application is directed to a packed decimal system that stores date data using a total of 6 digits including the last two digits of the year, two digits of the month, and two digits of the day using four bytes. , In the same 4-byte date data area, the last three digits of the year,
A total of seven digits, two digits for the month and two digits for the day, are stored in packed decimal numbers. This is to make full use of the original 7-digit date data area, which used only 6 digits. If a 4-digit date in the Christian era is put into a 4-byte area in packed decimal format,
Although the last three digits of the Christian era due to "digit overflow" occur, it is necessary to incorporate the date determination and processing logic.

Embodiments of the present invention will be described below with reference to the drawings. For example, EBCDIC
Code is described using JIS code or
Does not change even if it is an ASCII code.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

[Procedure amendment 5]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

FIG. 1 is a diagram showing an example of converting a lower two-digit year of a zoned decimal number into a four-digit year of the Christian era and storing the date in a packed decimal number. Last two digits of the year (eg, 980720/0012)
14), and add 1900000/20000000 to convert to a 4-digit date (eg, 19980720/20)
[001214] Then, since the data is stored in the same date data area as a 6-byte packed decimal number, the record length of the database and the blocking factor do not need to be changed.

Claims (2)

[Claims] 1. The date area of the database is 2
In the unpacked (zone type) decimal system that records a total of 6 digits of 2 digits, 2 months and 2 days using 6 bytes, a packed decimal system is adopted for the 6-byte date area. , 4 digits of the year, 2 digits of the month, 2 digits of the day, a total of 8 digits data is compressed to 6 bytes, and the 4-digit date is stored. 2. The date area of the database is 2
In a packed decimal system that records a total of six digits, two digits for the month, two digits for the day, and two digits for the day, the four-byte date area contains the last three digits of the year, two digits for the month, and two digits for the day. A system that stores a total of 7 digits in packed decimal.