JPH0425578B2 - - Google Patents

Description

[Detailed description of the invention]

(a) Technical Field of the Invention The present invention relates to a data checking method in a data processing system. Specifically, by clarifying the range of data to be checked on the terminal side and the center side, it is possible to avoid missing checks, double checks, etc. It concerns a check method that can prevent this. (b) Background of the technology As the amount of data handled by data processing systems increases and the data becomes more diverse, the load on host computers increases. type terminal devices are becoming popular. That is, by providing a terminal device with a program function, data calculations, editing, etc. can be performed on the terminal side, thereby reducing the load on the host computer. On the other hand, when order information is input on a terminal device and transferred to a host computer, each item of the order data, such as product name, code name, quantity, and unit price, must be entered according to certain definitions. For example, a product name may contain a mixture of letters and numbers, but a code name is defined to be expressed only by letters, a quantity/unit price is defined to be expressed only by numbers, the number of digits for each item is also defined, or a product name, code name, and quantity are For example, operator input is required, but unit price can be selectively input. Conventionally, the definition check for each of these items was performed by the host computer, but with the advent of the above-mentioned intelligent terminal devices, it is conceivable that the data check function will also be distributed between the terminal side and the host side. (c) Prior art and its problems When considering distributing the data checking function between the terminal side and the host side, if the scope of responsibility is not made clear, the data checking may not be performed. Alternatively, a so-called double check problem occurs in which the terminal side checks and then the host side checks as well. (d) Purpose of the invention This invention clarifies which items to check on the terminal side and the items to check on the host side among each item of transferred data, thereby preventing missing checks and double checks. This provides a check method. (e) Structure of the Invention For this purpose, the present invention provides a data checking unit and a checking storage unit in each of the data processing devices on the terminal side and the host side, and one of the checking storage units stores the items to be checked by itself. , the other checking storage section stores items other than the above-mentioned items, and each data checking section checks only the items stored in its respective checking storage section. (f) Embodiments of the Invention A data check system according to the present invention will be described below with reference to the drawings. In the figure, 10 is a data processing device on the terminal side;
For example, an intelligent terminal device 20 is a data processing device on the host side, such as a host computer, 1
1 and 21 are transmission and reception control units; 12 and 22 are transmission buffers; 13 and 23 are reception buffers; 14 and 24 are check determination units; 15 and 25 are data check units; 16 and 26 are storage units in charge of checking transmission data; Reference numerals 17 and 27 indicate storage units in charge of checking received data, and 30 indicates a line. Line 3 connected between both transmission and reception controls 11 and 21
By 0, data processing devices 10 and 11 are associated and data is transferred from one data processing device to the other. The transmission buffers 12 and 22 temporarily store data to be transmitted, and the reception buffers 13 and 23 temporarily store received data. The storage capacity of each of these buffers 12, 22, 13, and 23 is set to a capacity that can store one record made up of a plurality of items. Batsuhua 12,
The storage contents of buffers 22 and 23 are transferred to the check determination section 14, and the storage contents of buffers 22 and 23 are transferred to the check determination section 24. The check determining sections 14, 24 control the data checking sections 15, 25 based on the stored contents of the storage sections 16, 26 in charge of checking the transmitted data or the storage sections 17, 27 in charge of checking the received data. Each data check section 15, 25 checks each content of the transmitted data or received data transferred via the check determination section 14, 24, and includes an A check section that checks the presence or absence of an item, and an A check section that checks the presence or absence of an item. Check the number B
It consists of a check section and a C-check section that checks the format. Data checking units 15 and 25 are supplied with definition information defining each item from checking storage units 16 and 17 and 26 and 27, respectively. A checking storage unit 16 in the data processing device on the terminal side stores items to be checked by the data processing device on the terminal side among a plurality of items constituting the transmission data. On the other hand, a storage unit 2 in charge of checking received data in a data processing device on the host side
Reference numeral 7 stores items other than the items stored in the checking storage section 16 of the terminal side among a plurality of items constituting the received data transmitted from the terminal side as a range for data checking on the host side. Similarly, the storage unit 2 in charge of checking on the host side
6 stores items to be checked on the host side when data is transferred from the host side to the terminal side, and a storage unit 17 in charge of checking on the terminal side stores items to be checked on the terminal side regarding received data that has been transmitted. Memorize the items that become . With reference to Tables 1 and 2, the storage contents of the check storage units 16 and 27 will be explained in more detail. As shown in Table 1, the checking storage unit 16 in the data processing device 10 on the terminal side has three check contents and flags corresponding to each of the four items constituting one record. An item whose flag is set to logic ``1'' means that the data check is performed on the terminal side, and an item whose flag is reset or set to logic ``0'' means that the data check is performed on the terminal side. This means that it is ignored by the data processing device.
Note that check content A defines whether the item is an essential item for a record, and therefore corresponds to the A check part in the data check section 15, and check content B similarly corresponds to B.
Corresponds to the check part, and the check content C is C
Corresponds to the check section. Items for which flags are set also have their definition information stored, and are sent to the data check section 15 as described above. As shown in Table 2, in the checking storage unit 27 in the data processing device on the host side, flags are set for all items in Table 1 except for the items for which flags are set. Similarly, definition information for only the items for which flags have been set is stored, and is sent to the data check section 25 as described above. A detailed explanation of the storage contents of the check storage section 17 on the terminal side and the check storage section 26 on the host side will be omitted, but they may be considered in the same way as the storage sections 16 and 27.

【table】

[Table] Next, the operation when transferring data from the terminal side to the host side will be explained. First, when transmission data for one record is stored in the transmission buffer 12, the check determination section 14 reads out the data of item 1 from the buffer 12 and refers to the storage section 16 in charge of checking. As a result, for item 1, the flags are set for the check contents A and B, so the check determination section 14 stores the definition information (in this case, "OK" and "6") in the storage section 16. ) to the data check section 15
It also instructs the data check section 15 to operate the A check section and B check section. As a result, check contents A and B are performed for item 1. If the data satisfies the check result definition, the data check section 15 sends a signal indicating that transmission is possible to the transmission/reception control section 11, and if the data does not satisfy the definition, it sends a signal indicating that transmission is not possible. When the check for one item is completed, the next item is read out from the buffer 12 and checked in the same manner. In addition, when no check is performed on the terminal side for a certain item, that is, when the flags of check contents A, B, and C are all reset, the check determination unit 14
directly sends a transmission enable signal to the transmission/reception control section 11 without activating the data check section 15. On the host side, data transmitted from the terminal side is stored in the reception buffer 23. The check determining unit 24 reads item 1 from the buffer 23 and refers to the checking storage unit 27. As a result, it can be seen that only the item format needs to be checked for item 1, so the check determination section 24 sends the definition information (in this case "number") to the storage section 27.
It instructs the data check section 25 to send the C check section, and instructs the data check section 25 to operate only the C check section. By this,
The data check unit 25 checks the item format of item 1, that is, whether or not the data of item 1 contains data other than numbers. The explanation so far has been about transferring data from the terminal side to the host side, but the same can be considered for transferring data from the host side to the terminal side. Note that each data processing device 10, 11 is provided with separate check storage units 16, 26 for transmission and check storage units 17, 27 for reception, but each data processing device has one storage unit. This one storage unit may also be used for both transmission and reception. On the contrary, the data check sections 15, 25
are used for both transmission and reception, but they may be provided independently. (g) Effects of the invention As explained above, according to the present invention, the terminal side,
Since the host side has a memory section that defines the range to be checked, and the data check section performs the check based on the stored contents, it is possible to prevent data from being checked or double-checked. , it becomes possible to perform accurate data processing.

[Brief explanation of drawings]

The drawing is a block diagram showing the main parts of a data processing system according to the present invention. In the figure, 10 is a data processing device on the terminal side, 11 is a data processing device on the host side, 12 and 22 are transmission buffers, 13 and 23 are reception buffers, and 14 and 24 are
15 and 25 are data check units, and 16, 17, 26, and 27 are check storage units.

Claims (1)

[Claims] 1 In a data processing system that transfers data consisting of a plurality of items between a first data processing device 10 and a second data processing device 20, one data processing device 10 has a data check function that checks transmitted data. The other data processing device 20 has a data checking section 25 that checks received data, and a checking storage section 16 that stores items to be checked by itself among a plurality of items of transmitted data. The data checking section 15, 25 has a checking storage section 27 that stores items other than those checked on the sending side among the items, and each data checking section 15, 25 only stores the items stored in the respective checking storage sections 16, 27. A data check method characterized by checking.