JP2002007436A - Method and device for managing data to be dynamically changed and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data managing device capable of searching plural kinds of data the contents of which are possible to be dynamically changed according to prescribed ordinal property at high speed. SOLUTION: The plural kinds of data are recorded in a data file 21 according to the prescribed ordinal property. In addition, conditions to judge whether or not data in the data file is dynamically changed are prescribed in an item condition table 23. A main control part 1 specifies a point of time where the contents of the data are dynamically changed by judging the conditions prescribed in the item condition table 23 about the data in the data file 21 and records a dynamic change bit to indicate the specified point of time in a dynamic change index file 24 by associating the bit with the data. The applicable data is retrieved from the data file 21 by referring to the dynamic change bit in the case of retrieval.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer system which manages a plurality of types of data whose contents may change dynamically with the lapse of time. An improved management method for searching data at high speed.

[0002]

2. Description of the Related Art In a company handling products, it has become common to manage all product data using a data management device. The product data is composed of a set of records including items such as a product name, a release date, the number of sales, and a price, and the content of each record is constantly changed over time (month and day). Usually it is. As a cause of the change, a price increase, a price decrease, or the like in product sales can be given.

When the contents of data (records) change in this way, old contents are not simply replaced with new contents, but new contents are sequentially added to the previous contents. It is preferable to be able to acquire data at any point in time. For this reason, conventionally,
A storage location of data is determined in the order of elapse of time, data is stored as needed, and the corresponding data is retrieved from the storage location as needed.

In managing product data, there is a case where it is necessary to check whether or not the content of a specific item of the specific product data has been changed. In this case, the presence / absence of data change is usually determined by comparing adjacent data stored in time series. In the process of determining whether or not the change has been made, the time required for the search becomes longer when there are many product data or when there are many records included in each product data. Therefore, the applicant of the present application has previously used a change index using a “change bit” which is the smallest information unit indicating the difference between the previous value and the new value in the data items stored according to the order. Proposed a data management method for performing search (Japanese Patent No. 3016230)
issue).

[0005]

In the data management method described above, the "change bit" is determined by comparing values before and after the data. However, in reality, the content of data to be compared like the above-mentioned product data may be constantly changing. For example, paying attention to price, which is one item of product data, it is conceivable that the user wants to search for data at a point in time when the price dynamically changes from rising to falling or from falling to rising.

In this case, it is necessary to read out data of three or more histories that are continuous in time series, and first specify the point in time when the value changes from rising to falling or the point in time when the value changes from falling to rising. As described above, in order to search for the contents of dynamically changing data, data must be read many times.

In view of such circumstances, the present invention provides an improved management method capable of quickly searching for a plurality of types of data whose contents may dynamically change according to a predetermined order. The main task is to provide It is another object of the present invention to provide a data management device that enables efficient management of a plurality of types of data whose contents may change dynamically. Another object of the present invention is to provide a recording medium that is suitable for realizing the above management method with a general-purpose computer.

[0008]

According to the present invention, there is provided a method for managing dynamically changing data, wherein the following processing steps are executed in a computer device. (1-1) a data recording step of recording a plurality of types of data whose contents may be dynamically changed in a first file according to a predetermined order; (1-2) the first file.
The content of the target data recorded in the file and the content difference between the target data and the same or different data before, after, or at the same time are determined based on a rewritable predetermined condition to determine the content of the target data. A change time point recording step of specifying a time point at which the content has dynamically changed, and recording a dynamic change bit representing the specified time point in the second file in association with the target data; A search step of identifying a point in time when the contents of various data dynamically change by referring to the recorded dynamic change bit, and searching for the data at the identified point in time from the first file.

In the change time recording step (1-2), for example, the magnitude of the target data and the same type of immediately preceding data recorded immediately before the target data and the same type of similar data recorded immediately after the target data are recorded. It is determined whether the size of the target data is greater than the immediately preceding data and smaller than the immediately preceding data, or different depending on whether the target data is smaller than the immediately preceding data and greater than the immediately preceding data or not. This is a processing step of recording a dynamic change bit as a value in a second file.
“The magnitude of the data” means the magnitude of the quantified value. By adopting such a processing mode, it becomes possible to accurately determine and determine the changing points of the target data, which tend to keep increasing, the tendency to keep decreasing, and large → small, small → large. Preferably, the change time recording step (1-
In 2), the dynamic change bit is recorded in the second file in association with the time information at the time of the dynamic change. Thereby, data management in consideration of time information becomes possible.

In the search step (1-3), if the dynamic change bit recorded in the second file has a specific value, the dynamic change bit is changed until the value changes in a predetermined search direction. Try to skip them. Alternatively, a predetermined number of the dynamic change bits recorded in the second file are read to detect whether or not the value has changed. By doing so, it is possible to efficiently search for the data change point.

Data can be managed in a record unit of one or a plurality of items. In this case, the following processing steps are executed by the computer device. (2-1) a data recording step of recording, in a data file, a plurality of types of data whose contents may be dynamically changed in a record unit including one or more items;
(2-2) a first change point recording step of recording a change bit indicating a point in time when data recorded in the data file changes according to the order in the index file for each item; (2-3) the data file The content of the target data recorded in the target data and the difference between the content of the target data and the data of the same or different type before, after, or at the same time are determined based on a rewritable predetermined condition to determine the content of the target data. A second change time point recording step of specifying a time point at which the content dynamically changes and recording a dynamic change bit representing the specified time point in the dynamic change index file for each item in association with the target data; -4)
A search step of specifying a corresponding record or data in the data file by referring to the index file or the dynamic index file, and retrieving the specified record or data from the data file;

A data management apparatus according to the present invention for solving the above-mentioned other problems has a first file in which a plurality of types of data whose contents may be dynamically changed are recorded in a predetermined order. A table defining conditions for determining whether or not data recorded in the first file has dynamically changed; and determining whether or not data recorded in the first file has dynamically changed by the ordering. By determining the conditions specified in the table for the second file to be recorded according to the above and the individual target data recorded in the first file, the point in time when the content of the target data dynamically changes is specified. And control means for recording a dynamic change bit representing the specified time point in the second file in association with the target data, wherein the dynamic change bit recorded in the second file is provided. Referring to Tsu bets is a device that is configured to searches out the corresponding data from the first file.

Another data management apparatus according to the present invention includes a data file for recording a plurality of types of data whose contents may be dynamically changed in a record unit including one or more items. An index file associated with each item of a record recorded in a data file, and item conditions defining conditions for determining whether data recorded in the data file has dynamically changed for each item. A table, a dynamic change index file for recording the presence or absence of a dynamic change of data for each item recorded in the data file according to the order, the data file, the index file, the item condition table, And control means for controlling recording and reading of the dynamic change index file. The control unit of the apparatus records a record including the specific item in the data file in response to a data recording request of the specific item, and changes whether the data of the specific item changes according to the order. Bits are recorded in the index file, and further, by judging a condition defined in the item condition table for each target data recorded in the data file, a point in time at which the content of the target data dynamically changes. Identify
The dynamic change bit indicating the specified time is recorded in the dynamic change index file in association with the target data, and the corresponding record or data in the data file is referred to by referring to the index file or the dynamic index file. Configured to identify.
As a preferred embodiment, the data management device further comprises a unit for associating data recorded in the data file with the change bit and the dynamic change bit with time information. In this case, the control means includes:
The record or data is specified based on the time information.

A recording medium according to the present invention for solving the above-mentioned other problems is a computer-readable recording medium in which a program code for causing a computer device to execute the following processing is recorded. (3-1) a process of recording a plurality of types of data whose contents may be dynamically changed in a first file according to a predetermined order; (3-2) an object recorded in the first file The content of the target data dynamically changes by determining based on a rewritable predetermined condition either the content of the data or the content difference between the target data and the data of the same or different type before or after or at the same time. Identify when
Processing of recording the dynamic change bit indicating the specified time point in the second file in association with the target data; (3-
3) A process of referring to the dynamic change bit recorded in the second file to specify a point in time when the content of various data dynamically changes, and searching for the data at the specified point in time from the first file.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a data management device to which the present invention is applied will be described below. The hardware configuration of this data management device is as shown in FIG. In other words, a main control unit (CPU1:
A central processing unit) 1, a storage device 2 connected to the CPU 1, an input device 3 for receiving a request from an operator, a display device 4 for displaying input / output data, and reading the read data outside the data management device. A data management device is constituted by an output device 5 for outputting data to the device and an input / output control unit 6 for controlling input / output of data in the device.

The CPU 1 executes necessary control or processing by reading a control program or an application program.

The storage device 2 is a fixed storage device including a magnetic storage device such as a hard disk and a semiconductor storage device such as a RAM, and stores various files and program codes. In this embodiment, the data file 21,
An index file 22, an item condition table 23, a dynamic change index file 24, a storage / generation / search program 25, a control program, and the like are stored. These data files 21 and the like are usually stored and used in the above-mentioned fixed storage device, but are used for flexible disks, optical disks, magneto-optical disks, CD-ROMs,
-C on portable recording media such as R, DVD, magnetic tape, etc.
PU1 may be recorded in a readable form.
Further, the data may be downloaded from another device to the fixed storage device through a communication unit (not shown). The contents of the data file 21, the index file 22, the item condition table 23, and the dynamic change index file 24 will be described later in detail.

The recording / generation / search program 25 forms a data recording module for performing data recording processing, a dynamic change index creation module for performing generation processing of a dynamic change index, and a data search module for performing data search processing. It is for doing.

The control program performs a part of the actual processing based on the instruction of the recording / generation / retrieval program 25, and the above-described module is formed through the processing, or the above-mentioned module is formed in cooperation with another application. Although a module may be formed, here, for the sake of convenience, a description will be given assuming that the module is formed only by the recording / generation / search program 25.

The input device 3 is a keyboard, a mouse and other data input means. This is for receiving a data recording request, a data search request, and the like from the operator. The display device 4 is a CRT (Cathode Ray Tube) or FP
D (Flat Panel Display). The display device 3 is configured to display the content of a search request from an operator and a processing result according to the search request. The output device 5 is a printer or a storage device. In the case of a printer, the result of processing by the CPU 1 is printed and output. In the case of a storage device, the processing result is recorded on a recording medium.

The input / output control unit 6 transmits a request received through the input device 3 to the CPU 1 and sends a result processed in accordance with the request to the display device 4 or the output device 5.

Next, the data file 21, index file 22, item condition table 23, and dynamic change index file 24 will be described. <Data file> The data file 21 is a file for storing data generated according to the order.
Data is recorded in record units.
Each record is configured by data corresponding to a predetermined item. According to the contents illustrated in FIG. 2, the record with the record number # 3 is composed of data Da3 corresponding to the item a, data Db3 corresponding to the item b, Dc3 corresponding to the item c, and data Dd3 corresponding to the item d. Have been.

Data relating to at least one of the items a to d as shown in FIG. 2 is stored in a predetermined order. Examples of the order include a time-series order such as an old order or a new order. Examples of data stored in such a time series include the product data described in [Prior Art] above. That is, new records are sequentially created in accordance with the data update, and n records are accumulated in the data file 21 from the record number # 1 to the record number #n.

<Index File> The index file 22 is a file for recording and retrieving a change point of data stored in the data file 21 according to the order. FIG. 3 shows an example of the contents of the index file 22. The illustrated example corresponds to item b in the data file 21 of FIG. Change bits Bb1 to Bbn indicating whether newly recorded data is different from data recorded immediately before based on order.
Is recorded for each record. Change bits Bb1 to Bbn
Is a bit indicating whether or not there is a change point in the order of each data of the corresponding item. These change bits Bb1 to Bb
Since bn only needs to indicate the presence / absence of a data change point, at least a 1-bit data amount is sufficient. For example, change bit B corresponding to record number # 3
b3 is “1” when the data Db3 corresponding to the item b included in the record of the record number # 3 is different from the data Db2 corresponding to the item b included in the record of the record number # 2; Is recorded as "0". However, since the record of record number # 1 is the first record in the data file 21, "1" is recorded as a default value. Thus, since the index file 22 is provided for each item, for example, the item b
When the data relating to item b and item c are stored in accordance with the above-described order, individual index files are provided for item b and item c.

<Item Condition Table> Item Condition Table 2
3 is a new item name (item x ...) corresponding to the item name of the data file 21 (items a to d in the example of FIG. 2).
Is defined, the new item name is associated with a conditional expression indicating the content of the data change. "Conditional expression"
Is represented by a combination of data of individual items in the data file 21 and an arithmetic operation and a logical algebraic expression including the order and logical operator of each data. less than,
Specific examples of the conditional expressions will be described. (1) Dc (n−1) −Dc (n)> 0 XOR Dc (n) −Dc (n + 1)> 0 (2) Dc (n) ≦ 300 AND Dc (n) ≧ 150 (3) Dc (n −3) −Dc (n)> 50 (4) Dc (n)> Dd (n) (5) Dc (n) + Dd (n) + De (n) <Df (n−1)

In the above conditional expression, “Dc” means data of item c, and “Dd” means data of item d. "N"
Is the record stored at the nth position, and “Dc
(N) ”is the data value of item c of the n-th record,“ Dc
(N-1) "is the data value of item c of the (n-1) th record, and" Dc (n + 1) "is the item c of the (n + 1) th record.
Represents the data value of. Assuming that the data of item c is, for example, price data of a product, “Dc (n)” is the nth price, “Dc (n−1)” is the immediately preceding price, and “Dc (n +
1) "is the price immediately after.

In the conditional expression (1), the logical expressions of the preceding and succeeding stages have a value of either true “1” or false “0”, respectively. The preceding logical expression is the last price Dc (n−1)
Is an equation for subtracting the n-th price Dc (n) from, and determining whether the value is greater than 0. This logical expression becomes true “1” because the n-th price “Dc (n)” is the last price “Dc (n−
1)). On the contrary, false “0”
Is when the price rises. On the other hand, the subsequent logical expression is an expression that subtracts the immediate price Dc (n + 1) from the n-th price and determines whether the value is greater than zero. It becomes true “1” when the price drops, and false “0” when it rises. Since the results of the logical expressions in the preceding and subsequent stages are determined based on the condition of exclusive OR (XOR), both become "0" when the value increases or decreases. This indicates that either the price has continued to rise or the price has continued to fall. The XOR determination result becomes true “1” when only one of the logical expressions in the preceding and subsequent stages becomes true “1”, that is, whether the value has changed from falling to rising, or from rising to falling. This is the case when it has changed.

The conditional expression (2) indicates that when the price of item c at a certain point in time is 300 yen or less and 150 yen or more, it becomes true “1”. In the conditional expression (3), the difference between the price of item c at a certain point in time and the price three records before is 50.
This indicates that the value becomes true “1” when the size is larger than the circle.
(4) indicates that when the price of the item c is higher than the price of the item d of the same history, the value becomes true “1”.
(5) It indicates that when the sum of the prices of the items c, d, and e of the same history is smaller than the price of the item f one history before, it becomes true “1”.

A bit which becomes true "1" or false "0" by such a conditional expression is called a "dynamic change bit". As described in the above example, by describing an expression of a combination of an item name, an arithmetic operation including data order and a logical operator, and a logical algebraic expression, it is possible to create a dynamic change bit under various conditions. it can.

<Dynamic Change Index File> The dynamic change index file 24 records and searches whether or not the conditions described in the item condition table 23 are satisfied for the data stored in the data file 21 according to the order. Index file for
Dynamic change index file 24 illustrated in FIG.
Is an example provided corresponding to item x in the item condition table 23 of FIG. 4, and the dynamic change bit (true “1” / false “0”) of the result based on the conditional expression corresponding to item x is Are recorded for each record according to a predetermined order.

<Data Management Method> Next, an embodiment of a method for managing data which may be dynamically changed, which is performed by the data management apparatus configured as described above, will be described. First, the data recording procedure will be described with reference to FIG. Data recording is mainly performed by the aforementioned data recording module.

When data from the operator is input through the input device 3, the input data is sent to the data recording module via the input / output control unit 6 (step S1). The data recording module checks whether the data file 21 corresponding to the input data exists in the storage device 2 (Step 2). For example, when the input data is data on a predetermined product, it is checked whether a data file corresponding to the product exists.

If the data file 21 exists (step S2: Yes), a new record to be recorded in the data file 21 is created (step S2).
3). For such a record, a number obtained by adding “1” to the record number of the immediately preceding record is added as a new record number, and this is recorded in the data file 21 as the latest record at that time.

Thereafter, it is checked whether or not the index file 22 for each item of the data file 21 exists in the recording device 21 (step S4). If the index file 22 exists (step S4: Ye
s) For the item corresponding to the index file 22, the data recorded in step S3 is compared with the data stored immediately before. If each data is different, "1" is set, and the data is the same. In some cases, "0" is recorded as a new change bit in association with the record number newly assigned in step S3 (step S5).

There may be a plurality of index files 22 for different items. In this case, data is compared for each item. After recording the change bit, the data recording process ends. If the index file 22 does not exist for the corresponding item in the data file 21 (step S4: No), the data recording process ends.

If there is no data file 21 corresponding to the input data in step S2 (step S2: No), a new data file for recording the input data is created (step S2).
6). When this new data file 21 is created,
A record including the input data is created, and this is recorded in the data file 21 as the first record.
Since this is the first record, "1" is added to the record number (step S7).

Next, it is determined whether it is necessary to create an index file 22 for each item of the record (step S8). In the created one or a plurality of index files 22, a change bit “1” which is a default value is recorded corresponding to the record number # 1 (step S9). After recording the change bit, the data recording process ends. If there is no need to provide the index file 22 for any item in the data file 21 (step S8: No), the data recording process ends. With the above operation, data recording is executed, and a change bit is recorded in the index file 22 as needed.

<Generation of Dynamic Change Index> Next, a procedure for generating a dynamic change bit and a dynamic change index, which is one of the features of the present invention, will be described with reference to FIG. When a request for generating a dynamic change index is input to the input device 3 by the operator, a dynamic change index generation module is activated (step S11). The dynamic change index generation module performs an input process from the data file 21 (Step S12). If there is no record to be input, the process ends (step S13:
No). If an input record exists (step S1
3: Yes), referring to the item condition table 23, it is determined whether to create a dynamic change index (step S).
14). If the dynamic change index is not created, the process ends (Step S14: No). If the item name exists in the item condition table, a dynamic change index is created (Step S14: Yes). In this case, the dynamic change bit is calculated according to the definition of the conditional expression corresponding to the item name, and the dynamic change bit is recorded in the dynamic change index file 24 associated with the item name in association with the corresponding record number. (Step S15). Thereafter, the process returns to step S12.

The operation of the dynamic change bit is an operation whether the content of the conditional expression is true "1" or false "0". The calculation result is stored in the dynamic change index file 24 as a dynamic change bit. If the target data indicated by the conditional expression does not exist, the dynamic change bit is “0” as a default value. A plurality of conditional expressions may exist for one item of the data file 21. In this case, a dynamic change bit is obtained for each conditional expression and recorded in the corresponding dynamic change index file 24. After recording the dynamic change bit, the process ends.

With the above operation, the dynamic change index generation processing is executed, and the dynamic change bit is recorded in the dynamic change index file 24 as needed.
When data recording is newly performed, the above-described dynamic change index is generated at least once before searching for a data change point. Thereafter, the item names and conditional expressions in the item condition table 23 are added / changed / synchronized with the data accumulation.
Then, the dynamic change index can be added, changed, or deleted again. This means that the dynamic change index can be added / changed / deleted at any time while data recording and data change point search are not performed.

For example, in a search for a data change point on a certain day, a search is performed using the conditional expression z in the item condition table 23. After the search for the data change point is completed, a new conditional expression in the item condition table 23 is defined. To create a dynamic change index. This makes it possible to perform a search using the new condition α the next day.

<Data Search> Next, a data search method will be described. Here, a process for searching for changed data will be described. FIG. 8 and FIG. 9 are procedure diagrams in this case. It is assumed that the recording / generation / search program 25 is executed to form a data search module.

When a search request from the operator is received by the input device 3, the search request is sent to an area readable by the data search module via the input / output control unit 6 (step S21). The search request from the operator includes
It includes the identification information of the data file to be searched, the item name, the search condition, the start position (time) of the search, the search direction, and the like. Specify the search range as needed.

After receiving the search request, the data search module specifies a record number #m at which to start the search, based on the search start position specified by the operator (step S22). When the record number #m is specified, the dynamic change bit of the dynamic change index file 24 corresponding to the search condition received in step S21 is read. As a result, predetermined n dynamic change bits are read from the dynamic change bits corresponding to the record number #m along the search direction specified by the operator (step S23).

The data search module checks whether the dynamic change bit corresponding to the record number #m is "1" out of the read n dynamic change bits (step S24). When the dynamic change bit is "1" (step S24: Yes), each data included in the record number #m is notified to the operator as a search result (step S25), and the search process is terminated.

If the dynamic change bit corresponding to the record number #m is not "1" (S24: No), the search direction specified by the operator is checked (step S2).
6). If the search direction is ascending (step S26:
Yes), it is checked whether the record number #m is the minimum record number (step S27). If not (step S27: No), "1" is subtracted from the record number #m (step S28), and the dynamic change bit corresponding to the record number #m after the subtraction is referenced (step S29). If the search direction is not ascending (step S
26: No), it is checked whether or not the record number #m is the maximum record number (step S30). If it is not the maximum (step S30: No), 1 is added to the record number #m (step S31), and the dynamic change bit corresponding to the record number after the addition is referred to (step S29).

In step S27, record number #
If m is the smallest (Step S27: Yes), and if the record number #m is the largest in Step S30 (Step 30: Yes), the operator is notified that the corresponding record was not detected. Then (step S32), the search process ends.

When the dynamic change bit corresponding to the record number after the subtraction has been read in step S28, and when the dynamic change bit corresponding to the record number after the addition has been read in step S31 ( (Step S29: Yes), the process returns to step S24, and it is determined whether or not the dynamic change bit is “1”. If the dynamic change bits have not been read (step S29: No), the process returns to step S23, and the n dynamic change bits are read. By such a search process, a record requested by the operator can be quickly searched.

<Specific Example> Next, FIG. 10 shows a data file 21 exemplifying its contents, FIG. 11 shows an item condition table 23 exemplifying its contents, and FIG. 12 shows a dynamic change index file 24 exemplifying its contents. A specific example of the search processing used will be described. In the illustrated data file 21, the product A
It is assumed that various types of data are recorded, and a conditional expression in the data file 21 is defined in the item condition table 23. The dynamic change index file 24 has contents corresponding to the conditional expressions in the data file 21.

Here, a case will be described in which the search request is a request for searching for a record in the data file of the product A when a price drop or price rise has occurred. It is assumed that the operator has specified a point in time when the search is to be started, and the record number corresponding to this point is “12”. Further, it is assumed that the number n of the dynamic change bits read from the dynamic change index 24 is “3”.

The data management device accepts the request from the operator and sets the record number #m for starting the search to “1”.
2 ”(steps S21 and S22). In this example, since the search direction is in ascending order, three dynamic change bits are read in ascending order from record number # 12 (step S2).
3). This bit string becomes "110" as is clear from FIG.

When the dynamic change bit is read, it is determined whether or not the dynamic change bit corresponding to record number # 12, that is, the first bit of the bit string is "1" (step S24). Since the bit corresponding to record number # 12 is "0", the search direction is determined next (step S26). Since the search direction is ascending and the record number #m is not the minimum, the record number #m is "1".
The value is subtracted to "11" (steps S27 and S2).
8). Thereafter, the process returns to step S24 via step S29, and the dynamic change bit is determined again.

In this example, in step S24, it is determined that the dynamic change bit corresponding to the record number # 11 is "1", and the information corresponding to the record number "11" is notified to the operator.

<Detection of Number of Changes> Next, an operation for detecting the number of times data has been changed will be described. Here, it is assumed that a data search module is formed. When the operator requests acquisition of the number of changes for a specific condition of the data file 21, first, a dynamic change index file 24 corresponding to the specified condition is specified from the item condition table 23, and the corresponding dynamic change index file 24 is specified. From the change index file 24, all recorded dynamic change bits are read. Thereafter, the sum of all the read dynamic change bits is obtained. The determined result is notified to the operator. In the case of the dynamic change index file 24 shown in FIG. 12, "3" is notified to the operator. This number indicates the number of changes in which the price of the commodity A has risen from a fall or from a rise to a fall.

As described above, in the present embodiment, in the process of searching for information at the time of data change and the process of obtaining the number of data changes, only the dynamic change bits recorded in the dynamic change index file 24 are read. In addition, there is no need to read data recorded in the data file 21 on a record-by-record basis and compare them.

In the present embodiment, the item condition table 23 is specified at the time of a search request. However, even if the search request is made in the form of a conditional expression between a plurality of items, it is possible to cope with the request. In addition, the processing module analyzes the search expression, determines a combination of the item name and the conditional expression, and selects a dynamic change index prepared when the dynamic change index is generated.
It is also possible to select and process the optimal one.

It should be noted that not only the original items of the record but also other record items can be used in the logical expression constituting the conditional expression.

[0058]

As is apparent from the above description, according to the present invention, in a data management apparatus for managing data stored in accordance with an order such as a time series, information on a data change point based on a certain condition is provided. Search processing and the number of times the data condition is satisfied can be obtained at high speed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a data management device according to an embodiment of the present invention.

FIG. 2 is a configuration example of a data file recorded in a recording device of the data management device.

FIG. 3 is a configuration example of an index file recorded in a recording device of the data management device.

FIG. 4 is a configuration example of an item condition table recorded in a recording device of the data management device.

FIG. 5 is a configuration example of a dynamic change index file stored in a recording device of the data management device.

FIG. 6 is an explanatory diagram showing a procedure of a data recording process according to the embodiment.

FIG. 7 is a procedure explanatory diagram showing a procedure of a dynamic change index generation process in the embodiment.

FIG. 8 is an explanatory diagram showing a procedure of a data search process according to the embodiment.

FIG. 9 is an explanatory diagram showing a procedure of a data search process according to the embodiment.

FIG. 10 shows an example of a data file stored in the data management device.

FIG. 11 is an example of an item condition table recorded in the data management device.

FIG. 12 is an example of a dynamic change index file recorded in the data management device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main control part (CPU) 2 Storage device 3 Input device 4 Display device 5 Output device 6 I / O control part 21 Data file 22 Index file 23 Item condition table 24 Dynamic change index file 25 Recording / generation / search program

Claims (10)

[Claims] A data recording step of recording, in a first file, a plurality of types of data whose contents are likely to change dynamically in a predetermined order; and a method of recording target data recorded in the first file. The point in time when the content of the target data dynamically changes by judging based on the rewritable predetermined condition any one of the content and the content difference between the target data and the same or different data before, after or at the same time A change point recording step of recording a dynamic change bit representing the specified point in time in the second file in association with the target data; and referring to the dynamic change bit recorded in the second file. A point at which the contents of various types of data have dynamically changed, and retrieving the data at the point in time from the first file. Wherein the method for managing data that changes dynamically. 2. The method according to claim 1, wherein the change time recording step determines based on a predetermined condition that a content difference between the target data and the same type or different type of data recorded before and after the target data can be rewritten. A dynamic value that has a different value depending on whether the predetermined condition is satisfied or not when any of the content differences between the target data and the same type or different types of data recorded before and after the target data. The management method according to claim 1, wherein the change bit is recorded in a second file. 3. The management according to claim 1, wherein in the change time recording step, the dynamic change bit is recorded in a second file in association with time information at the time of the dynamic change. Method. 4. In the searching step, if the dynamic change bit recorded in the second file has a specific value, the dynamic change bit is skipped until the value changes in a predetermined search direction. The data management method according to claim 1, wherein: 5. The method according to claim 1, wherein the retrieving step includes a step of reading out the dynamic change bits recorded in the second file by a predetermined number and detecting whether or not the value has changed. The management method described. 6. A data recording step of recording, in a data file, a plurality of types of data whose contents may be dynamically changed in a record unit including one or more items, and A first change point recording step of recording, in the index file, a change bit indicating a point in time at which data in the data file changes according to the order; contents of the target data recorded in the data file; Alternatively, the time when the content of the target data dynamically changes is determined by determining based on a rewritable predetermined condition any one of the content difference from the data before, after, or at the same time of the different kind, and the specified time A second change point recording mode for recording a dynamic change bit representing the data in the dynamic change index file for each item in association with the target data. The corresponding record or data in the data file by referring to the change bit in the index file or the dynamic change bit in the dynamic change index file, and replace the record or data at the specified time with the data. A dynamically changing data management method, wherein a search step of retrieving from a file is performed in a computer device. 7. A first file in which a plurality of types of data whose contents may be dynamically changed are recorded according to a predetermined order, and a data recorded in the first file is dynamically stored. A table defining conditions for determining whether the first file has changed; a second file for recording the presence or absence of a dynamic change in data recorded in the first file according to the order; By determining the conditions specified in the table for each target data recorded in the above, the time when the content of the target data dynamically changes is specified, and the dynamic change bit indicating the specified time is set to the Control means for recording the data in the second file in association with the target data, and searching for the relevant data from the first file by referring to the dynamic change bit recorded in the second file It is configured to, a data management device. 8. A data file for recording a plurality of types of data whose contents may be dynamically changed in a record unit including one or more items, and a data file for recording the data recorded in the data file. An index file associated with each item, an item condition table defining conditions for determining whether data recorded in the data file has dynamically changed, for each item, and recording in the data file A dynamic change index file for recording the presence or absence of a dynamic change in data for each item according to the order, and recording and reading of the data file, the index file, the item condition table, and the dynamic change index file Control means for performing control, wherein the control means is triggered by a data recording request for a specific item. A record including the specific item is recorded in the data file, and a change bit indicating whether or not the data of the specific item changes in accordance with the order is recorded in the index file. By determining the condition specified in the item condition table for each target data item, the time point at which the content of the target data dynamically changes is specified, and the dynamic change bit indicating the specified time point is set to the target The corresponding record or data in the data file is specified by recording the data in the dynamic change index file in association with data, and referring to a change bit in the index file or a dynamic change bit in the dynamic index file. A data management device. 9. The apparatus further comprising: means for associating data recorded in the data file with the change bit and the dynamic change bit with time information, wherein the control means comprises:
The data management device according to claim 8, wherein the data management device is configured to specify a corresponding record or data based on the time information. 10. A method according to claim 1, wherein a plurality of types of data whose contents may be dynamically changed are stored in a first order.
Processing to record in a file, based on a predetermined condition capable of rewriting either the content of the target data recorded in the first file, or the content difference between the target data and the same or different kind of data before, after or at the same time Identifying the point in time at which the content of the target data dynamically changes, and recording a dynamic change bit representing the specified point in the second file in association with the target data; A time when the contents of various data dynamically change by referring to the dynamic change bit recorded in the first file, and retrieves the data at the specified time from the first file. Computer-readable recording medium on which a program code for recording is recorded.