JP2722684B2 - File system search device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for constructing an information retrieval system. The present invention relates to generation of a conditional expression of a file system having a function of performing a search by a conditional expression (logical expression) like a relational database and performing a search by a plurality of comparison condition items such as a range specification.

〔Overview〕

The present invention relates to a file system conditional expression generating apparatus for generating a conditional expression by inputting a variable in order to search a data file using a conditional expression including a given variable. By dynamically removing uninput variables and related logical expressions and symbols from basic conditional expressions, and increasing or decreasing variables can be processed simply by replacing basic conditions without modifying the program logic. It reduces man-hours due to variable changes and the like, and reduces bugs due to changes.

[Conventional technology]

Conventionally, in order to generate a search condition expression including an input variable, a conditional expression character string consisting of a combination of input variables is prepared, and in the program logic, the data input state of the input variable is determined and each conditional expression character A column was assigned.

FIG. 6 shows an example of the configuration of an information retrieval system according to a conventional method, in which a variable input means 11 and a conditional expression generating means 33 by means of fixed logic for generating a conditional expression from the input variables.
And data search means 14 for performing data search by a conditional expression
, A data storage unit 12, and a search result output unit 16. FIG. 7 shows an example in which the part of the condition generating means 33 with fixed logic is coded with a C-like description.

In the case of two variables as in the variable input means 11, four conditional expression character strings can be considered depending on the state of the variable, and each conditional expression is assigned in a procedure as in the conditional expression generating means 33 with fixed logic, and The search result is provided to the search means 14, the search result is taken out from the data storage means 12, and output to the search result output means 16. It should be noted that the conditional expression character string of "student + blank" in the conditional expression of the conditional expression generating means 33 with fixed logic indicates the meaning of the condition for outputting all data.

[Problems to be solved by the invention]

The above-described conventional conditional expression generation method has a drawback that the logic of the conditional expression itself needs to be changed due to an increase or decrease in input variables or a change in a logical function in the conditional expression.

For example, FIG. 8 shows an example of the configuration of the information search system according to the prior art in FIG. 6, which illustrates a change when a search condition variable is added, but one change of an input variable is added. As a result, the logic shown by the conditional expression generating means 33 with the fixed logic shown in FIG. 6 is changed as shown in FIG. Further, if the coding description is made in the same manner as the logic description example shown in FIG.
The amount of coding is about twice that of the logic description example shown in the figure.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a device capable of reducing man-hours due to a variable change and the like and reducing bugs due to the change.

[Means for solving the problem]

The present invention is a variable input means for inputting a search variable from the outside, a data storage means for storing search target data,
A conditional expression generating means for generating a conditional expression from the input variables; a data searching means for searching data in the data storage means by a given conditional expression; and a search result output means for outputting a search result to the outside. In the file system search apparatus provided, the conditional expression generating means is provided with a separate basic condition storing means for storing the basic conditional expressions corresponding to all the variables outside the logic without fixing the logic. Checking the uninput state of the input variable obtained from the variable input means based on the stored basic conditional expression, and dynamically deleting the logical function and the symbol related to the variable from the basic conditional expression to execute the executable condition It is characterized by including means for generating an expression.

[Action]

When generating a conditional expression by inputting a variable to search a data file by a conditional expression containing a given variable,
In order to remove uninput variables from the conditional expression, it is necessary to judge whether each input variable is not input and assign all the conditional expressions as a fixed logic in the program. Uninput variables from the conditional expression,
A logical function and a symbol in the related conditional expression are deleted to make the conditional expression dynamically executable.

As a result, changes in basic conditional expressions and changes in input variables can be processed simply by exchanging basic conditional expressions without changing program logic, reducing man-hours due to variable changes and reducing bugs due to changes. be able to.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. First
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a conditional expression generation pattern 17 in the embodiment of the present invention, FIG. 3 is a diagram showing a change state of an input variable in the embodiment of the present invention, and FIG. 4 is a basic conditional expression in the embodiment of the present invention. FIG. 5 is a diagram showing a configuration of a conditional expression generation pattern when an input variable increases in the embodiment of the present invention.

The embodiment of the present invention includes a variable input unit 11 for externally inputting a variable for search, a data storage unit 12 for storing search target data, a conditional expression generating unit 13 for generating a conditional expression from the input variable, Data storage means according to given conditional expression
It comprises a data search means 14 for searching data in 12, and a search result output means 16 for outputting a search result to the outside, and as a feature of the present invention, the logic is not fixed to the conditional expression generation means 13 A basic condition storage means 15 for storing the basic condition expressions corresponding to all variables outside the logic is provided, and the input variables obtained from the variable input means 11 based on the basic condition expressions stored in the basic condition storage means 15 are not inputted. Check the status,
Means for dynamically deleting logical functions and symbols related to the variable from the basic conditional expression to generate an executable conditional expression.

That is, the variable input means 11 inputs a search variable from the outside, the data storage means 12 is an entity for storing search target data, and the conditional expression generation means 13 is a basic conditional expression storage means 15.
And a search condition formula is generated by the variables obtained from the variable input means 11. The data search means 14 searches the data in the data storage means 12 according to the given conditional expression, the search result output means 16 outputs the search result to the outside, and the basic condition expression storage means 15 corresponds to all the variables. Stores the basic conditional expression to be performed. As shown in FIG. 2, the conditional expression generation pattern 17 is a list of an automatic deletion part of a basic conditional expression for a variable state in the present example and an effective conditional expression sequence.

FIGS. 3 to 5 show a change in the case where the number of input variables is increased in the embodiment of the present invention. The change of the input variables indicates that the number of variables is increased by one as shown in FIG. The change of the basic conditional expression indicates a portion where the basic conditional expression changes as the number of variables increases, as shown in FIG. 4, and the conditional expression generating pattern 23 has a pattern shown in FIG. 23 is a list of deletion subsequences and generation conditional expression sequences corresponding to the input variable state at the time of variable increase, as in the conditional expression generation pattern 17 shown in FIG.

Next, the operation of the embodiment of the present invention thus configured will be described.

Based on the variable input state from the variable input unit 11 and the basic conditional expression in the basic conditional expression storage unit 15, the conditional expression generating unit 13 generates a conditional expression as a conditional expression generating pattern 17. The determination of the deleted subsequence is a subsequence that has been recognized to be relevant by character string analysis of the conditional expression, and does not depend on a specific variable name or the type of the conditional expression. The generated conditional expression is provided to the data search means 14, data is searched from the data storage means 12 according to the condition, and is output to the search result output means 16.

As shown in FIG. 2, even if the number of input conditions increases by one, there is no need to change the condition expression generating means 13, and the basic condition expressions in the basic condition storage means 15 are replaced in accordance with the change of the basic condition expressions shown in FIG. The conditional expression generation changes as in the conditional expression generation pattern 23.

〔The invention's effect〕

As described above, according to the present invention, when a conditional expression is generated based on the input state of a variable in a file search system based on a conditional expression, an uninput variable, a related logical expression and a symbol are dynamically converted from the basic conditional expression. A means to delete is provided as standard, so that the increase or decrease of variables can be processed simply by exchanging basic conditional expressions without modifying the program logic, thereby reducing man-hours due to variable changes and other changes. This has the effect of reducing bugs.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a condition generation pattern in the embodiment of the present invention. FIG. 3 is a diagram showing a change of an input variable in the embodiment of the present invention. FIG. 4 is a diagram showing a change in basic conditions in the embodiment of the present invention. FIG. 5 is a diagram showing a configuration of a conditional expression generation pattern when an input variable increases in the embodiment of the present invention. FIG. 6 is a block diagram showing a configuration of a conventional example. FIG. 7 is a diagram showing an example of a logic description in a conventional example. FIG. 8 is a diagram showing a change of an input variable in a conventional example. FIG. 9 is a diagram showing a change in logic in a conventional example. FIG. 10 is a diagram showing an example of logic description in a conventional example. 11 ... variable input means, 12 ... data storage means, 13 ... conditional expression generation means, 14 ... data search means, 15 ... basic conditional expression storage means, 16 ... search result output means, 17 ... conditions Expression generation pattern, 23... Conditional expression generation pattern when input variables increase, 33.

Claims (1)

(57) [Claims] 1. Variable input means for externally inputting a search variable, data storage means for storing search target data, conditional expression generating means for generating a conditional expression from the input variables, and a given condition In a file system search device comprising: a data search unit that searches data in the data storage unit by an expression; and a search result output unit that outputs a search result to the outside, the conditional expression generation unit does not fix logic. In addition, a basic condition storage means for storing the basic conditional expressions corresponding to all the variables outside its logic is separately provided, and the input variables obtained from the variable input means based on the basic conditional expressions stored in the basic condition storing means are not inputted. Means for checking a state and deleting an uninput variable and a logical function and a symbol related thereto from the basic conditional expression to generate an executable conditional expression. Search device filesystem characterized.