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16.11.2015
SummaryIn this unit a relational data structure will be introduced, which describes and preserves the topology. For the demonstration purpose lets consider the Customer Dimension table T_DIM_CUST, which has 100 M records. Now the mapping development is complete,  during the session configuration process, add the below SQL as part of the Post session SQL statement as shown below. The initial phase of the this project involved the acquisition of existing data streams collected by a live building management system. In order to make use of the data you need to couple the data files with the Broadwin management application [11]. Each sensor produces various streams of information and each stream has an explicit tag that encodes its associated metadata. Any information that cannot be obtained from the tag may be obtained in the Broadwin management tool. The structure of data in the files contains a timestamp and four sets of values.It is not clear what the values are, but they are mostly exactly equal or different only less a few decimal places.
The file naming convention coupled with the Broadwin management tool point-list metadata entangles various types of information about the building and the sensors within them. Buildings are composed of various systems that help maintain the indoor environment comfortable and healthy for its occupants. The cooling tower(s) is connected to the chiller(s) which is connected to the air-handling unit. Our schema includes 6 tables: sensor_data, systems, types, system_sensors, zone_sensors, and sys_struct. We ran a simple test query to fetch the data for all temperature sensors on the 4th floor of Soda Hall to view the heat distribution map every 15 minutes overlayed on a map of the floor for a month.
This is the cumulative distribution for 38 temperature sensor reading received is the entire month of June. This visualization is useful for observing the temperature variation in the environment throughout the day. In this tutorial, you will create an application and a project in which to organize your database files. JDeveloper should be already installed and you should have access to an Oracle 11g database with DBA grants. In the Create Database Application dialog, change the Application Name from Application1 to CreateDBObjects and type oracle as the Application Package Prefix. JDeveloper provides a number of predefined templates which enable you to create applications and projects that are configured for developing different types of applications. The templates provide the environment for the basic range of technologies supported by JDeveloper. The options available to you in the New Gallery, and for some context menu operations, depend on your template selection for that application.
In the Application Navigator, Projects panel, projects are displayed as the top level in the hierarchy.
You can optionally close the window, since you will not be using it to create objects for this application. In the New Gallery, expand Database Tier and select Offline Database Objects, then select Database Diagram.
Alternatively, you can open the object editors to edit them declaratively, adding the elements that define the objects, such as columns, indexes, partitions, and tablespaces.
A project can have many database diagrams and mix objects from different schemas and databases on one diagram. In the Specify Location dialog, select Application Project. Enter DBOffline1 as the database name, and DBDEMO as the default schema name.
The database diagram displays the default table, named TABLE1. You can use JDeveloper to work directly with database objects through a database connection. Or you can import database objects from a database schema, make the changes you want, and then generate the changes back to the same database schema, to a new database schema, or to a file that you can run against a database at a later date.
You will use in-place editing in the database diagram to visually define and edit tables, columns and key relationships.
In the database diagram, select the new table name TABLE1, and change it by typing PERSONS. To add a column definition, click in the white box under the table name, then click again to expose the default format. Press Tab when you finish entering the columns, then click the top of the box next to the table name. To create a Primary Key or change the Primary Key to another column, you can double-click the table definition in the diagram and use the Edit Table dialog. To control the displayed properties, right-click in the table and select Visual Properties from context.
Double-click the PERSONS table component on the diagram to open the Edit Table dialog, where you can create a primary key.
Select Primary Key in the navigation panel, then shuttle PERSON_ID from the Available Columns list to the Selected Columns list. In the Component Palette, drag and drop a Table component onto the diagram.
Double-click the ADDRESSES table component on the diagram to open the Edit Table dialog, where you can create a primary key. Select Primary Key in the navigation panel, then shuttle ADDRESS_ID from the Available Columns list to the Selected Columns list.
In the Component Palette, select the Foreign Key component .
You can change the default name of the foreign key column or select another existing column as the foreign key column if you have already created it. By drawing the foreign key from PERSONS to ADDRESSES, a foreign key with cardinality 1:M is created in ADDRESSES. You could delete the key from the diagram by right-clicking the relationship and choosing Delete. Views are virtual tables based on the result-set of a SELECT statement that lets you combine tables and present the data as if the data were coming from a single table. In the diagram, double-click PERSON_INFO to open the Edit View dialog and then select FROM clause in the navigation panel. When you click Edit , the default JOIN is USING in the Edit Join dialog because the key column in both tables is PERSON_ID.
To do this, you would select Join Object in the Component Palette and click on the two table usages to be joined.
In the Edit Join dialog, accept the default JOIN, which is created using the Foreign Key, and click OK.
You can use the Edit View dialog to edit other clauses of the view, such as GROUP_BY and ORDER_BY. You use the Edit Table dialog to specify that you want to have the primary key for the table populated from a new sequence and updated via a new trigger. On generation of the DDL for the table, both the sequence and the trigger will be generated with no additional coding required.
To open the Edit Table dialog, you will double-click the table in the Application Navigator. In the Edit Table dialog, selecting Populate Column from a Sequence on insert on a column creates a default sequence for that column, and an associated trigger. In the Application Navigator, select the PERSONS_SEQ node then drag and drop it onto the diagram. The offline database diagram and Application Navigator display the new sequence and trigger you created. You can edit the sequence (for example, set the increment, minimum and maximum values) by double-clicking PERSONS_SEQ in the Application Navigator to open the Edit Database Sequence dialog. If you have been following along with the example, the database objects created emulate an Oracle 11g database. Partitioned tables allow the data to be broken down into smaller, more manageable pieces called partitions, that can aid performance.
Partitions can be further broken down into subpartitions for finer levels of manageability and improved performance. You will add another table (ORDERS) to your example and create a foreign key between it and the PERSONS table.
In the Application Navigator, under Offline Database Sources, right-click the DBOffline1 node, and choose New Data base Object New Table. In the Create Table dialog, enter ORDERS as the table name, and select Advanced to display additional options.
Under Column Properties, change the name to ORDER_ID, then select NUMBER from the Type dropdown list. In the navigation panel, select Primary Key, and shuttle ORDER_ID from the Available list to the Selected list. You can choose from any of the schemas that you have referenced in your project to create foreign keys between tables in different schemas.


Select any column in the local table as the foreign key column (in this example PERSON_ID). A name based foreign key allows you to create a foreign key in a table that you have not added to your project. You can then enter the Referenced Schema, Table, and Constraint names, select the column in your table that is to be used as the foreign key, and enter the Referenced Column from the referenced table.
The Offline Only option lets you specify whether or not the information is used when DDL is generated for the table.
In the navigation panel, select Partitioning, and select RANGE from the Partition By dropdown list. Notice that since you defined a Foreign Key between Orders and Persons in the Edit Table Properties dialog, it is automatically drawn on the diagram when you drop the Orders table. Range, Hash, List, Composite Range-Hash and Range-List partitioning is supported for both tables and indexes. In this example, two range partitions of the ORDERS table were created to partition orders with an order date before 1 January 2007 and for the year 2007.
Then you can proceed with the steps near the end of this card to create a DBDEMO connection. To begin creating a database connection, you will open the Create Database Connection dialog. When you create a database connection, you specify a username and password to authenticate the connection.
If you can connect as a user with DBA privileges, follow steps 3 through 14 to create an IDE database connection and then create a new database user with the name DBDEMO. In the Create Database Connection dialog, select IDE Connections if it is not selected as the Create Connection In option. The Database Navigator provides you with a complete editing environment for online databases.
The database connection is added under the IDE Connections node (for example, TutorialConn). If you have DBA privileges, you can proceed to create a new database user and grant that new user specific Roles and Privileges. Click the System Privileges tab and select Granted for the following roles: ALTER ANY SEQUENCE, ALTER ANY TABLE, COMMENT ANY TABLE, CREATE ANY INDEX, CREATE ANY SEQUENCE, CREATE ANY TABLE, CREATE ANY TRIGGER, CREATE ANY VIEW.
When you create the DBDEMO database connection, the connection is now included as a resource for your application in the Application Resources panel of the Application Navigator. On step 3, shuttle the offline database objects from the Available list to the Selected list.
If you have been following along with the example, the database objects created emulate an Oracle 11g database, and you can shuttle all the offline database objects to the Selected list. If you have created objects that emulate another database type, for example an Oracle XE database, shuttle all objects except ORDERS to the Selected list.
After selecting database objects in step 3 of the wizard, no additional action is needed in subsequent steps. In Step 4 of the wizard you can select whether to CREATE, REPLACE or ALTER the chosen objects.
Step 5 allows you to specify the name and directory of the SQL script to be generated and other options such as prefixing the object name with the schema name.
Step 6 summarizes the options chosen in the wizard and lets you save this set of options for reuse.
In the SQL Worksheet, select the connection DBDEMOConn from the dropdown list on the right of the toolbar.
You can specify any actions that can be processed by the database connection associated with the worksheet, such as creating a table, inserting data, creating and editing a trigger, selecting data from a table, and saving that data to a file.
Make sure that the database in which you are creating the objects supports all your offline database types.
In the SQL Worksheet toolbar, Run Script executes all the statements in the Enter SQL Statement box. A powerful function of JDeveloper is the ability to compare offline database object definitions with live database objects. You will use the Edit Table dialog to make changes to your previously created offline objects and compare those changes to the live version of the objects in the database. You will then use the Generate SQL from Database Objects wizard to generate a SQL script to update the live database definitions. In the Application Navigator, under Offline Database Sources, right-click the DBOffline1 node, and choose Generate to launch the Generate SQL from Database Objects wizard. You are then able to specify which of the differences should be included in the generated DDL. The left panel of the Manual Reconcile page shows the offline definition of the objects in your project. By shuttling differences to the right panel you are specifying that these changes should be included in the DDL to be generated. On step 5, expand the PERSONS and ADDRESSES nodes to review the differences, which are highlighted in the left panel.
After completing the wizard, the new script script2.sql displays in the DBOffline1 node in the Application Navigator. Another advantage of reverse engineering from a database is the ability to visualize existing schemas in a diagram. You will create a new project in your application for the reversed-engineered database objects. You will then reverse engineer database objects into the project using the Copy Database Objects to a Project wizard. In the Application Navigator, right-click the DBRevEng project and select New from context. On step 1 of the Copy Database Objects to a Project dialog, confirm that the application connection you created earlier, DBDemoConn, is selected in the dropdown list.
On step 2, click the New button to the right of the Offline Database field to create a new offline database. In the Application Navigator, right-click the DBRevEng project and select New from context. Enter DBOffline2 as the diagram name, and confirm that oracle is entered as the package name. In the Application Navigator, select all the generated objects that have been reverse engineered into the project (except the trigger one that doesn't display on a database diagram) then drag and drop them onto the diagram. The new database diagram shows the reverse-engineered objects, which were generated into the project and then dragged onto the diagram.
First create a new diagram, expand the Application Resources panel in the Application Navigator and navigate to the live database objects, then select the required objects and drag them directly onto the diagram.
We obtained 1 year of data from over 1400 sensors inside Soda Hall from the supervisory control and data acquisition system (SCADA).
The management application is an online visualization tool for the SCADA data that provides a visual representation of the various buildings on campus, including the capability of zooming into specific rooms and corridors as well as HVAC systems and sub-systems. For example, a folder named 'SODA3R787__ART' is a folder that holds the data files generated by a temperature sensor in Soda Hall, room 787 and that sensor is associated with air handling unit 3. In order to make the data accessible for analysis and reduce building management complexity, the information need to be distilled into schemas that express the relationships between the building systems and sub-systems, the sensors within them, and the data generated by each sensing device. The systems consist of a cooling towers, chillers, pumps, air handling units, and other sub-systems that manage the indoor environment. The air-handling unit (AHU) contains a set of supply and exhaust fans which take air in and out of spaces or zones within the building. Using these schemas we could run simple queries that give us timeseries data in either a system or a zone. For each of the 38 sense points, 98% or more the temperature values were interpolated in time using simple linear interpolation.
You connect to a database and create a new user, then work in Oracle JDeveloper to create an offline database that you will reverse-engineer. You'll see how to create a database user, reconcile the offline definitions with the current database definitions, and generate a DDL reconciliation script. It stores information about the objects you are working with, while you are creating your application. You create your working environment by selecting the template that best fits your needs and then configuring it to add any additional technologies you intend to use. All objects that you create within JDeveloper appear in the Application Overview file summary pages, arranged by object type. You should save your work at regular intervals as you progress through the rest of the tutorial. You can create offline tables, foreign key relationships, views, synonyms, sequences, usages, and joins directly on the diagram.
Alternatively, you can work with offline database definitions which you can subsequently generate to a database schema. You can also use JDeveloper's modeling tools to visualize your offline database objects on a diagram. In the diagram, click the top of the PERSONS table, then click the top of the ADDRESSES table to create the foreign key. If you cannot see the Foreign Key, Primary Keys or some of the columns, stretch the table objects.


You can add SQL Functions, Joins, WHERE, GROUP BY, ORDER BY, or HAVING clauses to a view, to present exactly the data you want to the user. You can drag tables onto the view to add the table usages to the FROM clause of the view and all the columns to the SELECT clause. To specify that the SQL statement for the view uses CREATE or CREATE OR REPLACE, use the DDL page of the Edit View dialog.
In the diagram, click the PERSONS table, then click the PERSONS_SEQ sequence to create the relationship. If you have created objects that emulate another database type, for example an Oracle XE database, you may not be able to create partitions in a table. You then add a partition to the ORDERS table to partition orders with an order date before 1 January 2007 and for the year 2007.
You can review these by double-clicking ORDERS in the Application Navigator to open the Edit Table dialog.
If you can connect as a user with DBA privileges, follow the steps in this card to create an IDE database connection and then create a new database user with the name DBDEMO. If you don't have DBA privileges, ask your DBA to create a DBDEMO database user with the Roles and System privileges as specified in this tutorial. To expand the database connection and see the schema and database objects, click the + icons. In the New Gallery, select General > Connections > Database Connection again to create a DBDEMO connection for the DBDEMO user you added earlier. This is because table partitions have been defined in ORDERS, which are not supported in XE databases. For instance if you are using an Oracle XE Database, note that it does not support table partitions.
Database connections that are owned by the IDE (available to all applications) are displayed under an IDE Connections node. You can visually compare each change and choose to either generate that change to the database in the form of an ALTER script, or live to the database. If there is any text that has been changed (such as the addition of the comment on the GENDER column in this example), highlighting the text node will enable the Compare Text button so that you can compare the full text. JDeveloper gives you the ability to reverse engineer any existing objects in the database into your application.
To open the dialog, in the Application Navigator, open the Application Navigator dropdown menu and choose New Project.
Relational tables with the names points, contours, polygons and countries [Rigaux at al] In order to implement a vector data model, it is natural to use relational data structure. Below is the Router Group Filter Condition and you can see how the mapping looks like in the below image (Below mapping image has not any transformation logic in it).
The data consists of a set of files for each sensor stream produced by each sensor in the SCADA system. It also shows the placement of sensors within the building, inside various room, vents, pumps, and other systems within the building that manage the internal environment and control the systems that manage the environment. It is in the detailed point information that is displayed by double-clicking on the sensor of interest.
It is important to express the structure explicitly so that when sensors are added or removed the integrity logical representation of the state of the building kept intact with respect to the physical system. Within each system is a set of sensors that monitor the health of the system and various actuators for remote management of the system.
This is an important first step for providing a general schema that building management systems could all use so that the same queries can run on the data for different buildings without having to be changed much. The figure below shows the data yield relative to the total number of readings we were expecting to receive (temperature reading every minute for each sensor).
For example, if a vent is clogged, one might notice that the area assigned to that vent is getting warmer (or cooler in the winter) and would show up on the heatmap as a cold spot. You drag components from the Component Palette onto the diagram, then draw relationships and annotations, such as attachments and dependencies, between objects. One way to populate a key with a value from a sequence is to use a trigger to insert the sequence's NEXTVAL into the field. In the New Gallery, select Connections in the Categories tree and Database Connection in the Items list. If you are connecting to the database to create other users, you must enter a username that has been granted DBA privileges.
You must have DBA privileges if you (and not your DBA) will be creating a new database user.
Users working alone can access the resources or groups of resources in a catalog where they are available in one place, for use with all applications. If you choose a database that does not support table partitions and you have been following along with this example, the range partitions for the ORDERS table should be deleted from the script as they cannot be added to an XE database. Other toolbar icons allow for operations such as History that displays a dialog with information about SQL statements that you have executed, and Explain Plan that generates the execution plan for the statement. If a connection is owned by an application, it is displayed under a node for the owning application, for example CreateDBObjects.
You can select Only Show Differences to remove from view those items that have not changed. From there you can edit, delete and create new offline definitions prior to generating new SQL scripts.
In the New Gallery, expand Database Tier and select Offline Database Objects in the Categories tree.
In the case of the spaghetti model, we have experienced that polygon structures can be well defined by using a relational data structure. Some zones do not have human occupancy and therefore have different ventilation and temperature constraints.
Therefore, in order to run a query, we first had to interpolate the values and run the query on the interpolated temperature data.
The 'hot' corners in the 'March 2009' heatmap are an artifact of this type of interpolation. The DBDEMO connection under CreateDBObjects contains the database objects you have just generated. Now, let us examine how to refine the relational structure to achieve a topologically correct structure automatically. For example, temperature sensors report three streams at a period of one minute: temperature, setpoint, and gain. Sensors and actuators inside zones serve to provide feedback to the AHU which works to maintain the temperature and air circulation. The system_sensors and zone_sensors list all the sensor information and their relative context with respect to the system or zone they are associated with and the coordinates with respect to a coordinate system within the building. Then we used the coordinate information to place the sensors on a map and fit a three dimensional sheet to the sense points in the space to generate the graphs below. If each of the 1400 sensors produce 100-byte reports every minute for a year, you collect approximately 70 GB of data. To find it you must locate the sensor and fetch the associated point information through a series of clicks in the user interface. Sensors and actuators inside the various system serve to monitor system health and performance. Finally the sys_struct schema captures that structural relationship between the various systems in the building. The areas with the highest integrity are those close to the location of the sensor (shown by the blue dots). In the point information display there are several metadata fields that are (or are not) be populated. For example, the hot-spot that appears in both graphs is an electrical room and the cold spot next to it is a computer machine room with two air-conditioners. As described in Figure 31, basic geometries are stored in the "pontok" table, the "konturok" table containing contours is referencing to the "pontok" table, the "poligonok" table containing polygons is referencing to the "konturok" table. If it is populated, then the associated information can then be mapped to the system number. These relationships, both physical and logical should be captured in the schemas associated with the building. Another flaw in the model is that it does not limit interpolation by the walled boundaries that exist in the physical space. The "konturok" table contains as many linestrings as many borderlines (neighbour polygons) each polygon (surface) has, and the "Orszagok" table references to the "poligonok" table as geometrical data.
What is actually necessary is not only a physical heat model but also one that takes into account the separation of spaces throughout the floor by walls, doors, and windows. Other additional data (like name, capital, population) are stored inside the table structure.
By double-clicking on the reading you are taken to another screen that gives you more detailed information about the sense point.



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