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Development of an automated system for the integration of partially homogeneous databases. Vinokurov Anatoly Stanislavovich. Sholom-Aleichem Priamursky State University, Undergraduate

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Vinokurov Anatoly Stanislavovich. Sholom-Aleichem Priamursky State University, Undergraduate Development of an automated system for the integration of partially homogeneous databases Vinokurov Anatoly Stanislavovich Sholom-Aleichem Priamursky Stat
УДК 004.42
original article: http://e-postulat.ru/index.php/Postulat/article/view/1665/1699
Development of an automated system for the integration of partially
homogeneous databases
Vinokurov Anatoly Stanislavovich
Sholom-Aleichem Priamursky State University
Undergraduate
Abstract
The article deals with the development of an automated system to solve the
problem of bringing the tables of two partially homogeneous databases to a
common denominator, the integration of tables within one database, as well as the
integration of two partially homogeneous databases. Such a program should
automate the process of calculating similarity coefficients and then integrate the
databases based on these estimates.
Keywords: information technology, automated system, database integration,
database merging, database consolidation, homogeneous databases, partial
homogeneity, it project, integrated development environment, IDE, Lazarus,
Delphi.
On the basis of the methods of integration of partially homogeneous
databases proposed in the framework of the master's thesis "Research of questions
and development of methods of integration of partially homogeneous databases", it
was decided to develop its own automated system to solve the problem of bringing
the tables of two partially homogeneous databases to a common denominator, the
integration of tables within one database, as well as the integration of two partially
homogeneous databases. Such a program should automate the process of
calculating similarity coefficients with subsequent integration of databases based
on these estimates. The evaluation of similarity coefficients is made by the user. It
remains for him the right to confirm or deny the results of the calculation of the
program.
Many researchers have devoted their work to the development of
applications for database integration. M. R. Genesereth, A. M. Keller, O. M.
Duschka [1] described the development of proprietary software under a
commercial name of "Infomaster»performing database integration. Yan L. L., Otsu
M. T., Liu L. [2] proposed a model, which performs integrated access to
heterogeneous data sources, and developed on the basis of the model mediator
software system "Aurora", which automates the process of database integration. C.
Li, R. Yerneni, V. Vassalos, H. Garcia-molina, Y. Papakonstantinou, J. Ullman,
and M. Valiveti [3] has developed a software system "T. S. I. M. M. I. S.»in the
form of mediator, which, based on user requests builds the table that contains
reference attributes to the source database. W. Klas, P. Fankhauser, P. Muth, T. C.
Rakow, E. J. Neuhold [4] has considered developing its own software system "V.
O. D. K. A.", providing integration of multiple databases using open objectoriented systems. J. Lee, S. E. Madnick, M. D. Siegel [5] have described the
requirements for software development for the integration of relational databases.
Ph. D.Thiran, J. L. Hainaut, S. Bodart, A. Deflorenne, J. M. Hick [6] carried out
the development of the software under the commercial name "dbMain", intended
for maintenance and development of integration schemes for databases. P. Ziegler
and others [7-9] described the development and testing results of the software "S. I.
R. U. P.", which implements the semantic integration of heterogeneous data.
Reynaud and others [10-12] conducted a study on the construction of scalable
mediator systems. As a result of the research, we have developed our own
information system for solving the set questions. A. Levy, A. Rajaraman, and J.
Ordille [13] have developed a software-based system called "Information
Manifold", which optimizes the data sources from different sources. Boyd [14-15]
described the development of the "Automated»system that solves the problem of
data integration for heterogeneous data sources.
The development of a program produced in svobodnorasprostranyaemoj
development environment Lazarus 1.8.2 [16] in the programming language Object
Pascal (Fig. 1), and then, after the completion of the development and testing of
our software, the project was transferred to the shareware cross-platform
development environment IDE Embarcadero Delphi [17]. This development
environment was chosen because of the trial license, cross-platform development
support, and Delphi-like environment (Fig. 2), and the transfer of the project from
one environment to another, more powerful, allowed to bring additional
advantages of a more powerful development environment to the project.
Figure 1-Lazarus development Environment
Figure 2-Embarcadero Delphi development Environment
Standard Delphi components were used in the project, as well as a package
of freely distributed components AlphaControls v13.16 [18], because to which it is
possible to add a unique style of design and visualization to the user interface of
the program.
Let's move on to the project. We have created the main form of the program
called "MainForm". The main form of the program in the Formstyle property was
set to fsMDIForm, and also set the minimum and maximum form sizes-properties
MaxHeight, MaxWidth, MinHeight and MinWidth of the Constraints property
group. The main form contains the "MainMenu»component responsible for
creating the main menu, as well as the "sSkinProvider»and
"sSkinManager»components of the AlphaControls package (Fig. 3).
Figure 3-Main form of the program
Next, functional forms were added to the project, which will be displayed
inside the main form "MainForm", because to the fsMDIChild value of the
formstyle property of each form.
The structure of the program is shown in figure 4.
Figure 4 – the structure of the program
The following components of sLabel, sRadioGroup, sButton are located on
the Step_one form (Fig. 5).
Figure 5-Step_one Form»
SRadioGroup component is designed to allow the user to select the
integration option: if you select "integrate tables in one database»is the hiding of
the form "Step_one»creating the form "Tables_Step_two"; "to merge two
databases»is the hiding of the form "Step_one»creating the form
"Database_Step_two".
Consider the form "Tables_Step_two", designed to connect to one database
and then integrate its tables.
The following components of sLabel, sEdit, sButton, sGroupBox,
MySQLDatabase, sStatusBar, PopupMenu are located on the form
"Tables_Step_two»(Fig. 6).
Figure 6-Form «Tables_Step_two»
Components sEdit is used to specify the connection parameters to the
database. To hide/show the password entered by the user in the password field, the
PopupMenu component is used. Button "Connect»(sButton component), connects
to the database based on the connection parameters entered by the user, and
monitors connection errors. The Next button hides the current form and moves to
the next form "Tables_Step_three". The Back button closes the current form and
frees the memory allocated for it.
The form "Tables_Step_three»contains the following components: sLabel,
sButton, sGroupBox, sDBGrid, MySQLQuery, DataSource (Fig. 7).
Figure 7-form «Tables_Step_three»
SDBGrid component is intended for displaying a list of database tables.
When you select a table in sDBGrid1, a list containing the column names of the
selected table as well as a complete list of parameters is displayed in sDBGrid2.
The button "Customize table»produces hides the current form and navigate
to a special form "Setting_up_tables".
Let us consider the form of "Setting_up_tables".
The form "Setting_up_tables»contains the following components: sLabel,
sButton, sRadioGroup, sPageControl, sCheckListBox, sEdit, sComboBox,
sSpinEdit, MySQLTable, MySQLQuery, DataSource (Fig. 8).
Figure 8 – Form "Setting_up_tables»program
Component sRadioGroup1 located in the upper part of the form is designed
to allow the user to select further action. When selected, the user displays the
appropriate tab of the component sPageControl1 located on it features.
Let's take a closer look at all the features of the functional choice.
When you select "Divide one table into several»sRadioGroup1, happens
display tabs "to Divide one table into several»sPageControl1. On this tab, the user
can select a table in the sComboBox, choose how many tables to duplicate this
table, and select which columns of this table you want to use.
Next, the user must select the desired item sRadioGroup2. When you select
"set name for new tables automatically", the program will set the name for each
new table and will contain a prefix, and the»set name for new tables manually «tab
of sPageControl2 will be hidden. When you select "set name for new tables
manually", the»Set name for new tables manually "tab is displayed.sPageControl2
on this tab, the user must enter a name for each new table in sEdit, and at the same
time, each time press the"Apply»button.
At the end of the work, the user must click on the»split «Button, and the new
tables will be added to the database using the SQL query of the MySQLQuery
component (Fig. 9).
Figure 9 – Function "to Divide one table into several forms
Setting_up_tables»program
When you select "Sliate multiple tables into a single»sRadioGroup1, there is
a tab display "Sliate multiple tables into a single»sPageControl1. On this tab, the
user can select multiple tables and columns for each selected table in the
sCheckListBox.
Next, the user must select the desired item sRadioGroup3. When you select
"Merge to existing table", the»Merge to existing table «tab opens, where the user
will be prompted to select the table in the sComboBox, to which the information
will be pumped using the SQL query of the MySQLQuery component (Fig. 10).
Figure 10 – the Item "Sliate in the existing table»function "Sliate multiple
tables into a single»form "Setting_up_tables»
When you select "Create a new table to merge", the tab "Create a new table
to merge»will open, sPageControl3, where the user must enter a name for a new
table in sEdit, which will be pumped information using SQL query component
MySQLQuery (Fig. 11).
Figure 11 – Click "Create a new table for the mail merge functions to Sliate
multiple tables into a single»form "Setting_up_tables»
When you select "Split multiple columns of a table»sRadioGroup1, happens
display tabs "to Separate multiple table columns»sPageControl1. On this tab, the
user must select the table and its column in the corresponding sComboBox, choose
how many columns to divide this column of the table, and select the "separator
type»in sComboBox. There are several standard types of delimiters: "space",
"Dot", "semicolon", as well as "Own", which allows you to enter characters
directly into the sComboBox field itself. With the separator type selected, the
program will know how to separate the information for each new column from the
original. This feature provides only a small automation of the time-consuming
process of separating words in a sentence stored in a column of the table, and can
not always guarantee a one hundred percent result. The responsibility for the
correct separation of tables remains entirely with the user (Fig. 12).
Figure 12 – the "Split multiple columns in the table»forms
"Setting_up_tables»
When you select "Sliate more columns from the table»sRadioGroup1, there
is a tab display "Sliate more columns from the table»sPageControl1. On this tab,
the user can select a table in the sComboBox, and select the columns of the table to
be merged in the sCheckListBox.
Next, the user must select the desired item sRadioGroup4. When you select
Merge to existing column, the Merge to existing column tab opens, where the user
is prompted to select a table column in the sComboBox. When you select "Create
a new column to merge", the tab "Create a new column to merge»will open,
sPageControl4, where the user must enter the name of a new column in sEdit, after
which the information will be pumped using the SQL query component
MySQLQuery (Fig. 13 – 14).
Figure 13 – "Sliate in the existing column functions to Cliate a few columns
in the table»forms "Setting_up_tables»
Figure 14 – click the "Create a new column for the merger»"Sliate a few
columns in the table»forms "Setting_up_tables»
Upon completion of the work with the table setup (form,
"Setting_up_tables") must click "Ready". The form "Setting_up_tables»will be
hidden and the transition back to the form "Tables_Step_three"will take place.
The Next button hides the current form (the form»Tables_Step_three") and
moves to the next form"Tables_Step_four".
The form "Tables_Step_four»contains the following components: sLabel,
sButton, sGroupBox, sComboBox, StringGrid, MySQLTable, MySQLQuery,
DataSource (Fig. 15).
Figure 15-Form «Tables_Step_four»
Because to the scombobox components located at the top of the form, the
user can select the first table and its column, as well as the second table and its
column, which contain similar data, as well as specify the coefficient of
compliance. This factor is responsible for the weights of the matching criteria and
participates in the similarity formula in the next step. The coefficient can be of the
following types: "Semantic attributes", "time Attributes", "Universal identifier",
"foreign key Attributes", "Facts". Clicking on the "set match»button displays the
selected parameters in StringGrid1. Based on the user-defined correspondence, the
program will then start to compare the records of the selected columns of each of
the database tables.
Below is another group of scombobox components responsible for adding
foreign keys. This option is required if the tables selected in the previous step
contain foreign keys of other tables stored in the database. This item is optional
and can be configured at the user's discretion. Clicking on the "Add table foreign
key»button displays the selected parameters in StringGrid2.
The Next button hides the current form and moves to the next form
"Tables_Step_five". The Back button closes the current form and frees the memory
allocated for it.
The form "Tables_Step_five»contains the following components: sLabel,
sButton, sDBGrid, DataSource, MySQLQuery, StringGrid (Fig. 16).
Figure 16-Form «Tables_Step_five»
the order in which the information is displayed in the sDBGrid components
at the top of the form.
The "Calculate match»button extracts a record from the n-th column of the
first table and compares it with all records of the n-th column of the second table.
Then takes the next record of the same column of the first table and compares it
with all records of the column of the second table. The cycle continues until all the
columns in both tables are finished. At the end of the calculation, the user will be
displayed in StringGrid the following information: the name of the compared
record of the n-th column of the first table, opposite it will be displayed the name
of the compared record of the n-th column of the second table, next to it the
similarity coefficient; and also provides output in the penultimate column of
StringGrid information containing the arithmetic mean value of similarity
coefficients and the inscription "like»on against each compared record. This
inscription is put on the basis of the value selected by the user in the item
"Consider similar records, the coefficients of which". In the last column, records
whose arithmetic mean of coefficients is greater than this value are automatically
assigned the value "similar". Now the user can change this value or assign it to
other records by simply clicking on the desired cell of the last StringGrid column.
For convenience, it was added programmatically create a ComboBox component
by clicking on the StringGrid cell.
The Next button hides the current form and moves to the next form
"Tables_Step_six".
The form "Tables_Step_six»contains the following components: sLabel,
sButton, StringGrid (Fig. 17).
Figure 17-Form "Tables_Step_six»
The StringGrid component of this form displays all records from the
StringGrid of the previous step that have been assigned the "similar"properties.
The Next button hides the current form and moves to the next form
"Tables_Step_seven".
The form "Tables_Step_seven»contains the following components: sLabel,
sButton, sRadioGroup, sPageControl, sCheckListBox, sEdit, sComboBox,
MySQLTable, MySQLQuery, DataSource (Fig. 18).
Figure 18-Form "Tables_Step_seven»
Component sRadioGroup1 located in the upper part of the form is designed
to allow the user to select further action. When selected, the user displays the
appropriate tab of the component sPageControl1 located on it features.
Let's take a closer look at all the features of the functional choice.
When you select "Create a new table and move it like
recording»sRadioGroup1, happens display tabs "to Create a new table and move it
like recording»sPageControl1. On this tab, the user can enter the name of the new
table in sEdit, as well as select which columns of the source tables to use when
transferring information to the sCheckListBox (Fig. 19).
Figure 19 – click the "Create new table and drop the write-like forms
Tables_Step_seven»
When you select "Choose the table to transfer the data»sRadioGroup1, there
is a display tab "Select the table to transfer the data»sPageControl1. On this tab,
the user can select the database table in sComboBox, as well as select which
columns of the source tables in the sCheckListBox to use when transferring
information to the selected table (Fig. 20).
Figure 20 – click the "Select table to transfer the data forms
Tables_Step_seven»
When you select "Create a new database and transferred to it such
records»sRadioGroup1, happens display tabs "to Create a new database and
transferred to it such records»sPageControl1. On this tab, the user can specify a
name for the new database in sEdit, select which tables and their columns to use in
the components of the sCheckListBox when transferring information to the new
database, and specify the location for the new database.
The "Check connection to host»button checks the connection based on the
information entered by the user and includes functions for catching connection
errors (Fig. 21).
Figure 21-Item «Create a new database and transfer similar records to it
"form»Tables_Step_seven»
Upon completion of the form "Tables_Step_seven", you must click "Next".
Will be hidden form and go to form "Tables_Result".
The "Tables_Result»form contains the following components: sGroupBox,
sLabel, sButton, sDBGrid, MySQLDatabase, MySQLQuery, DataSource (Fig. 22).
Figure 22-Form «Tables_Result»
SDBGrid1 component is intended for displaying a list of database tables.
When you select a table in sDBGrid1, a list containing the column names of the
selected table as well as a complete list of parameters is displayed in sDBGrid2.
All information contained in the table selected in sDBGrid1 is displayed to the user
in sDBGrid3.
The "Shut down»button closes the program. The button «Go to the main
form (Step1)»closes the current form and goes to the form "Step_one". The Back
button closes the current form and frees the memory allocated for it.
Consider the form "Database_Step_two", designed to connect to two
databases and their subsequent integration.
In the form of "Database_Step_two»has the following components sLabel,
sEdit designed for entering the connection parameters to the database, sButton,
sCheckBox, sGroupBox, MySQLDatabase, sStatusBar (Fig. 23). These
components perform similar functions as the components located on the
"Tables_Step_two»form, but unlike the latter, they are designed to connect two
databases at once.
Figure 23 - Form «Database_Step_two»
The components used to connect to the second database are prefixed with the
name "DB2_". This is done in order to facilitate orientation in the code as it is
written.
The form "Database_Step_three»contains the following components: sLabel,
sButton, sGroupBox, sDBGrid, MySQLQuery, DataSource (Fig. 24).
Figure 24 - Form «Database_Step_three»
SDBGrid1 component is intended for displaying a list of database tables.
When you select a table in sDBGrid1, a list containing the column names of the
selected table as well as a complete list of parameters is displayed in sDBGrid2.
The button "Customize table»produces hides the current form and navigate
to a special form "Setting_up_tables". The "Next»button shall hide the current
form (form "Database_Step_three") and the transition to the next form
"Database_Step_four". The Back button closes the current form and frees the
memory allocated for it.
The form "Database_Step_four»contains the following components: sLabel,
sButton, sGroupBox, sComboBox, StringGrid, MySQLTable, MySQLQuery,
DataSource (figure 25).
Figure 25 - Form «Database_Step_four»
Because to the scombobox components located at the top of the form, the
user can select the table of the first database, its column, as well as the table of the
second database and its column, which contain similar data, as well as the
matching coefficient. Clicking on the "set match»button displays the selected
parameters in StringGrid1.
Below is another group of scombobox components responsible for adding
foreign keys. Clicking on the "Add table foreign key»button displays the selected
parameters in StringGrid2 or StringGrid3, respectively.
The Next button hides the current form and moves to the next
form"Database_Step_five". The Back button closes the current form and frees the
memory allocated for it.
The form "Database_Step_five»contains the following components: sLabel,
sButton, sDBGrid, DataSource, MySQLQuery, StringGrid (Fig. 26).
Figure 26-Form «Database_Step_five»
The MySQLQuery component contains a SQL query represented by an
enumeration of the tables selected in the previous step when matching. This is the
order in which the information is displayed in the sDBGrid components at the top
of the form.
The "Calculate match»button extracts a record from the n-th column of the
table of the first database and compares it with all records of the n-th column of the
table of the second database. Then takes the next record of the same table column
of the first database and compares it with all the records of the table column of the
second database. The cycle continues until all the columns of the tables in both
databases are finished. At the end of the calculation, the user will be displayed in
StringGrid the following information: the name of the compared record of the n-th
column of the table of the first database, opposite it will be displayed the name of
the compared record of the n-th column of the table of the second database, next to
it the similarity coefficient; and also provides output to the last column of
StringGrid information containing the arithmetic mean value of similarity
coefficients and the inscription "similar»against each compared record. This
inscription is put on the basis of the value selected by the user in the item
"Consider similar records, the coefficients of which". In the last column, records
whose arithmetic mean of coefficients is greater than this value are automatically
assigned the value "similar". Now the user can change this value or assign it to
other records by simply clicking on the desired cell of the last StringGrid column.
For convenience, it was added programmatically create a ComboBox component
by clicking on the StringGrid cell.
The Next button hides the current form and moves to the next form
"Database_Step_six". The Back button closes the current form and frees the
memory allocated for it.
The form "Database_Step_six»contains the following components: sLabel,
sButton, StringGrid (Fig. 27).
Figure 27 – Form "Database_Step_six»program
The StringGrid component of this form displays all records from the
StringGrid of the previous step that have been assigned the "similar"property.
The Next button hides the current form and moves to the next form
"Database_Step_seven".
The form "Database_Step_seven»contains the following components:
sLabel, sButton, sRadioGroup, sPageControl, sCheckListBox, sEdit, sComboBox,
MySQLTable, MySQLQuery, DataSource (Fig. 28).
Figure 28 - Form «Database_Step_seven»
Component sRadioGroup1 located in the upper part of the form is designed
to allow the user to select further action. When selected, the user displays the
appropriate tab of the component sPageControl1 located on it features.
Let's take a closer look at all the features of the functional choice.
When you select "Choose Database and create new tables for transfer of
records»sRadioGroup1, there is a tab display "to Select the Database and create
new tables for transfer of records»sPageControl1. On this tab, the user can select
the name of the database in sComboBox, specify in sSpinEdit the number of new
tables that will be created in the selected database, as well as select which columns
of the table for which the coefficients were calculated, should be used.
Next, the user must select the desired item sRadioGroup2. When you select
"set name for new tables automatically", the program will set the name for each
new table and will contain a prefix, and the»set name for new tables manually «tab
of sPageControl2 will be hidden. When you select "set name for new tables
manually", the»set name for new tables manually "tab is displayed.sPageControl2
on this tab, the user must enter a name for each new table in sEdit and click
the"Apply»button each time.
At the end of the work, the user must click on the "Next»button and new
tables will be added to the selected database using the SQL query of the
MySQLQuery component (Fig. 29).
Figure 29-Item "Select Database and create new tables in it to transfer
records "form»Database_Step_seven»
When you select "Choose Database and select tables for transfer of
records»sRadioGroup1, there is a tab display "to Select the Database and select
tables for transfer of records»sPageControl1. On this tab, the user can select the
name of the database in sComboBox, select the tables and columns of the database
in sCheckListBox1 and sCheckListBox2, as well as in sCheckListBox3 select
which columns of the table for which the coefficients were calculated, it is
necessary to use (Fig. 30).
Figure 30 – click the "Select Database and select tables for transfer of
records»form "Database_Step_seven»
When you select "Create a new database and transferred to it such
records»sRadioGroup1, happens display tabs "to Create a new database and
transferred to it such records»sPageControl1. On this tab, the user can specify a
name for the new database in sEdit, select which tables and their columns to use
when transferring information to the new database in the components of the
sCheckListBox, and specify the location for the new database.
The "Check connection to host»button checks the connection based on the
information entered by the user and includes functions for catching connection
errors (Fig. 31).
Figure 31-Point «Create a new database and transfer similar records to it
"form»Database_Step_seven»
Upon completion of the form "Database_Step_seven", you must click
"Next". The form will be hidden and the form "Database_Result"will be moved.
The form "Database_Result»contains the following components:
sGroupBox, sLabel, sButton, sDBGrid, MySQLDatabase, MySQLQuery,
DataSource (Fig. 32).
Figure 32 - Form «Database_Result»
The sDBGrid component is used to display the list of database tables
selected for integration of the calculated information at the previous stage. When
you select a table in sDBGrid1, a list containing the column names of the selected
table as well as a complete list of parameters is displayed in sDBGrid2. All
information contained in the table selected in sDBGrid1 is displayed to the user in
sDBGrid3.
The "Shut down»button closes the program. The button «Go to the main
form (Step1)»closes the current form and goes to the form "Step_one". The Back
button closes the current form and frees the memory allocated for it.
Thus, we can make sure that the developed functional forms of the
automated system for the integration of partially homogeneous databases have
been created at a high level and should further automate the process of bringing the
databases to a common denominator, the process of integration of tables within one
database, as well as the integration of two partially homogeneous databases
through automatic calculation of similarity coefficients.
The first working version of the automated system for the integration of
partially homogeneous databases is a working application tested on Windows 10,
Windows 7, Windows XP, Ubuntu Linux v 18.04.
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