The Print When Expression

The Print When Expression

The print when expression in Jasper Studio or Jasper iReport is very useful in so many requirements and it is defined as the name itself implies
i.e Print /Show a String, Column and so on Based on a condition passed.
Now here are some requirements on how/when we can implement The Print when expression.

Requiremnt: Show a particular column when a parameter is selected
Solution:
Here we made a parameter Called ShowLocation with values either ‘Y’ or ‘N’/blank space
now when ‘Y’ is selected then a Location column should show and when ‘N/blank space then it doesn’t show.

2 ways i did approach this:

1. I made a 2 Table Components one with the Location Column added and the other without the Location Column added.
one on top the other.
so when my parameter calls a ‘Y’ value it picks the Table with the Location Column and vice versa.

This approach is good but can be time and performance consuming

the 2nd approach was:

2. Only one Table Component was used, Opened the Table Component and selected the Column i want to restrict/show based on the parameter passed, in my scenario or requirement it is the Location column as
shown in the image below:

TableLayout

now i would select the cell button

Cellin the properties Tab and then Select the
Print When Expression.

Now here in the print when expression box i would write :
PrintExperssion
$P{showlocation}.equals(“Y”) as shown above

 

and you are good to go for a preview.
Now Let’s have to put a N or blank space in the parameter showlocation we get the following output
before
and now let’s pass ‘Y’ in the showlocation parameter

before-Y
So Now with this condition it will show the column when the parameter is checked in with a ‘Y’ Value.
and voila the output:

after

Thanks
Sohail Izebhijie.

Let’s Have Fun with Triggers in SQL

Let’s Have Fun with Triggers in SQL

What are Triggers?

Triggers are a Block of Structure that executes when a DML Statement is performed or Executed. Triggers are fun to use but from a business point of view not advisable but that a different story entirely ie the Pro’s and Con’s. but for gaining an idea about Triggers here is what the Video Covers

  1. Basic Creation of a Trigger
  2. and a simple real-time scenario on how i used triggers

The Video here illustrates or covers the above points.

Beginner’s Guide to OLTP and OLAP

Beginner’s Guide to OLTP and OLAP

In this blog we will be looking into the introduction of OLTP and OLAP. How it is defined and how we can relate it to real-time

Firstly, OLTP stands for On-line Transaction Processing and OLAP stands for On-line Analytical Processing

But to define OLTP and OLAP in the Simpliest of language is
OLTP is defined as “What is Happening” ie it deals with various transactions as it happens
and OLAP is defined as “What has happened” ie it deals with Stored Data.

OLTP is more of INSERT, DELETE, UPDATE, MODIFY i.e perform Day to Day Operations
But OLAP on the other hand is more of Fetching Data i.e Perform Analysis.

Take for Example a Supermarket Counter : the Counter receives payment for a particular product thus the event happening is a transaction which should be inputted into the Database
Hence it’s a OLTP.

But the OLAP is once the Data has been stored and the only Operation performed is Fetching the Data then it is said to be OLAP which can be used for
Business decision making and planning.

OLTP is a Relational Database and it’s 2-Dimensional in nature i.e Mathematically it is in the form of x and y axis
but OLAP on the other hand is a Multi-dimensional Database i.e Mathematically it is in the form of x, y, z, nth axis.

Now a question arises how is OLAP and OLTP represented? OLTP is represented in a Normalized Form and OLAP in a Star Schema or even at times in a Snow Flake Schema

OLAP Data- Structure is Designed in a Tree Format making it easy to Traverse.

Thanks,

Sohail

Helical Insight for ETL Tester (QA)

Helical Insight for ETL Tester (QA)

Let’s take an example that your ETL developer has just wrote an ETL script, which loaded the data into the Data Warehouse, few millions of records got inserted into the Data Warehouse.

For QA, it is super difficult to test all (millions) of the data and also a time consuming process. Moreover, there are many other problems like

  • some might not be well versed with writing complex SQL queries
  • There might be multiple data sources involved in generating the Data Warehouse.
  • Writing multiple queries on multiple data sources and then combining it in one single result set would be a sweat breaking task.

Now think of Helical Insight as your friend which helps you to do most of your tasks, allowing you to focus on more critical thinking rather than just doing stare and test whole day. Wondering how Helical Insight can help you achieve the same?

Here is your answer,

  • Helical Insight is capable of communicating with any of your data source(s) like CSV, Excel, MySql, Oracle, SQL Server, Postgres etc.
  • Helical Insight has a drag and drop feature to make your test cases ready, without even having a prior knowledge of SQL queries. Helical Insight generates the SQL queries including the joins between multiple entities. Helical Insight understands your data structure, hence it generates the query even if you are working with different set of data source(s), DW or normalized database, Helical Insight understands all.
  • Using this (drag and drop) facility you can generate all your test cases in a form of report, which you can call it as your test cases. For example, your report does a count of records for a dimension. You can save this report and check the same with source system by creating a separate report. If its a migration project the count should definitely match otherwise we know something is wrong with the ETL Script.
  • Once you have saved these reports (test cases) you can re-executes them again an again to verify your data. In the above situation you have just identified that Helical Insight is really a very useful tool with some really cool features like generating the SQL query for any database or data source(s), ability to execute the queries on any databases or data source(s), ability to save the report / test cases / SQL queries for future usage.

How to use List (Component ) in Ireport.

How to use List components in Ireport :

When dragging over a list component to one of the report’s bands, iReport will not prompt you for anything, unlike the process for the table component. You’ll have to configure it once it’s on the design area. Once the List component is in the design area, you can edit the table datasource (by right-clicking on the component).

  • In the “Connection/Datasource Expression” tab, set the drop-down to “Don’t use connection or datasource”

  • In the “Parameters” tab, add a new parameter:

    • Set the “Dataset parameter name” to REPORT_CONNECTION

    • Set its corresponding Value Expression to the parameter containing the database connection statement

Once you have that ready, you will be ready to drag fields, values or parameters for that subdataset over to the List element’s area.

Example :

Lets start with some example to understand more perfectly :

Here my main idea is to create a report with positon and salary range of each employee department.

Step1: create an Employee Report :

1

step 2:

here I selected some fields employee id ,hiredate,fullname,position title and salary as dispayed below.

2

Step 3 :

lets drag and drop list element into footer position of positon group as below, now you can see a dataset1 automatically formed in report inspector and listcomponent as shown below.

3

Step 4:

Now lets add some querie in dataset1 with a parameter positon_id and create the same in parameter list

like below

4

step 5:

Drag and drop the fields from the dateset1 into the list ,dont use the fields from the main dataset.

5

Step 6:

now right click on list(component ) and click Edit list datasource , a pop up will be appeared in use data source expression use connection expression

6

step 7:

select the parameters tab and and map the parameter with the field in main report position id

7

8

step 8:

Run the report to get the desired output

9

This is how we can use lists in ireport..

Thank you.

Jaspersoft 6.2 Features and Upgrades

Dear Jaspersoft Users,

In this blog we would be talking about the latest version of Jaspersoft i.e. Jaspersoft 6.2 new features.

a. Advanced multi-tenant server administration capabilities

Jaspersoft in its latest release is providing more options to for administration of a multi-tenant envrionment. There is an option through which administrator can export resources for a particular user (which includes option to export data sources, domains, adhoc views, reports, dashboards, scheduled report job, other resource files, sub-organizations, dependencies, permissions, attributes and values).

Below snapshot can be referred to see the UI for the above functionality.

Jaspersoft 6.3

Jaspersoft 6.2

While exporting and then importing for some other user, the other user may/may not have certain accesses and privileges. Based on that proper warning messages appear like shown below

Jaspersoft 6.3 Import Warnings

Jaspersoft 6.2Import Warnings

 

b. Dashboard Improvements

There are certain small incremental improvements which Jaspersoft is making to make their dashboarding experience better (even though there is still a long way to go). In the latest release, Jaspersoft has added the option to add images to the dashboard. This image can also be fetched from a certain web link as well.

Also with the latest release, it is possible to export a dashboard in pdf/image/ODT format. Phantomjs libraries have been used for achieving this functionality. The input filters option can also appear as a popup options on top of the dashboard.

Jaspersoft 6.3 Dashboard

Jaspersoft 6.3 Dashboard

also with latest version, it is possible to drill down into the same panel by clicking on any portion of the chart.

 

c. Advanced charting customization options

Jaspersoft enterprise version uses highcharts. High charts provides a lot of customization option of the charts via APIs. In the latest release of Jaspersoft, they have created certain UI to trigger and have customization option of the charts. Using this some of the customizations which can be done like color, orientation, labels, reset option and position, title text, subtext, legend, panning, hover etc.

There is also a hyperlink of more information which opens a wiki page of Jaspersoft with more details regarding customization.

Jaspersoft 6.3 Charts Customization

Jaspersoft 6.2 Charts Customization

 

d. New charts

Treemap new chart has been added inside Jaspersoft adhoc reporting feature. Below snapshot is a treemap chart.

Jaspersoft Treemap Chart

e. Master scheduler view

With the latest version, Jaspersoft has a page wherein the loggedin user can see how many jobs have been scheduled and he is also having the option to selectively enable/disable those jobs. One user can not see the details of other users email scheduled jobs.

f. Reporting Improvements

There have been certain improvement on the jaspesoft studio or report designing level as well. In Jasper studio now there is an option to add a custom visualization component, thus any javascript (like D3 charts also) can be added inside and used.

– Also there is geojson support inside tibco geoanalytics and geomaps

In a frame multiple elements can be added, and then on resizing the frame the other elements present inside it gets resized. The same can also be done for tables so that columns fit the table element. Previously resizing was a very tedious job and this is a welcome improvement.

Jaspersoft 6.3 studio

 

Please get in touch with us at nikhilesh@helicaltech.com for any Jaspersoft, Pentaho, ETL related requirements or queries.

Thankyou

 

Creating a project in SpagoBI Studio

Creating a project in SpagoBI Studio

SpagoBI Studio is an eclipse based BIRT reporting software and creating a project in SpagoBI studio is very much easy and recommended too as all our reports / documents will be organized in better way

Let’s start creating a project in SpagoBI Studio:

  1. Start SpagoBI studio
  2. Click File > New and select Project.
  3. Search for Report Project under (Business Intelligence and Reporting Tools).
  4. Assign Spago Tutorial
  5. Now, you should be able to see SpagoBI Tutorial under Project Explorer.
  6. Click Yes, to open Report Design Perspective.

Project Creation

Thanks & Regards
Venkatanaveen Dasari™

Creating a folder under Functionalities Tree in SpagoBI Server

Creating a folder under Functionalities Tree in SpagoBI Server

In general Spago BI uses its own functionalities tree which allows to better organize documents / reports by grouping them in folders. Although in built Folders are provided to organize (Analytical documents, Custom Documents and Audit & monitoring under Functional Tree) but most of the cases we like to maintain our reports to be placed under different folder.

Based on Role-Based permissions these folders are visible to user. This structure can be created or modified only by the administrator.

Let’s start creating a folder under Functionalities Tree:

  1. Login as biadmin.
  2. From left menu, Select Functionalities Management under Profile tab.
  3. By clicking on a node of the functionalities Tree a set of possible actions is shown:
  4. While clicking on Functionalities insert option fill in Label, Name & Description (option) on Functionalities Detail page.
    • Insert
    • Detail
    • Erase
    • Move up/down
  5. Assign roles as preferred and Save the page

Work Flow

Thanks & Regards
Venkatanaveen Dasari™

How to Replace Various Unwanted Characters during Reporting Using Jasper Studio

How to Replace Various Unwanted Characters during Reporting Using Jasper Studio

Reporting in Business Intelligence is the representation of Data in a more meaningful manner
so at times we need to follow some few formats to make our data to the End-User or Clients more meaningful to their Business

Now in some cases
characters like

commas (,), asterisk (*) and periods (.) are not permitted
and permitted characters can be Ampersand (&) , hyphens (-)

so what do we do here?

since jasper has various text functions one in particular that can be used here will be

the replaceAll() method

so this can be done on the particular columns you want make the required changes.

Now Let’s go to the field column you want and edit the Expression.

In my case:
I would be editing the First Name Column to the required format
so now we use the replaceAll() method

My requirement is to remove all commas and replace it with a [space]
so a simple

$F{firstname}.replaceAll(“,”,” “).trim()

can be used
Note: if you are wondering and new to Jasper why i used trim(), I used a trim() here because at times a name can be in the form

Helical,IT Solutions,

Now with the $F{firstname}.replaceAll(“,”,” “) it gives us the result Helical IT Solutions [space] this hereby create an extra space at the End so
a trim() method is used to remove unwanted spaces at the End.

OK now you have an idea on how to replace unwanted characters with the required characters
Now go ahead and replace * with –

and . with [space]

Did you get and Error?

Indeed yes you will get an Error if you
wrote your expression as

 $F{firstname}.replaceAll(“,”,” “).replaceAll(“*”,” “).replaceAll(“.”,” “).trim()

and if you didn’t well skip this part 😉

ok now if “.” is kept it actually treats it as a . and not as “.” the character same goes with the “*”

so the appropiate expression would be

$F{firstname}.replaceAll(“,”,” “).replaceAll(“[*]”,” “).replaceAll(“[.]”,” “).trim()

 

well there are various way also to express the . as character and [.] is one of them
and now you are good to go

– Izebhijie Sohail Ehizogie

Note: Quotations are in the form of quotation open and quotation close

Introduction To HBASE

Introduction To HBASE

HBASE is the database which stores huge amount of data and we can retrieve data in a random manner.

HBASE is distributed column-oriented database which is built on top of the haddop file system.Tables in it are sorted by row.

Column-oriented databses : Databases that store data tables as sections of columns of data , rather than row of data . It is suitable for Online Analytical Processing.

HBASE is a part of Hadoop eco system.

HBASE internally uses Hash tables and provides random access , and it stores the data in indexed HDFS files for faster lookups.

HBASE is schema – less. It doesn’t have the concept of fixed column schema.

In HBASE ,

1. Table is a collection of rows

2. Row is a collection of column – families.

3. Column family is a collection of columns

4. Column is a collection of key-value pairs.

HBASE is used whenever there is a need to write heavy applications.

HBASE is used whenever we need to provide random access to available data.

Thanks,

Rupam Bhardwaj