SSIS

1. SQL Server Integration
Service 2008

2. What is SSIS?
 SQL Server Integration Services (SSIS)- Microsoft Platform for
developers to Extract, Transform and Load (ETL) packages along
with other automation tasks.
 SSIS contains graphical tools and wizards for building and
debugging packages( consistent with Visual Studio IDE).
 SSIS is a replaces of Data Transformation Services (DTS).

3. SSIS Tools
 Wizards
 SQL Server Import and Export Wizard
 Package Migration Wizard
 …
 SSIS Designer
 built into the BI Development Studio and is the main surface for
package development.
 Command-prompt utilities
 Dtexec (run an existing package at the command prompt )
 Dtutil (manage existing packages at the command prompt)

4. SSIS Development Environment
 SSIS Projects:
 Data Sources
 Data Source Views
 SSIS Packages:
 Control flow
 Tasks
 Loops, sequences and events
 Variables and scoping
 Precedence constraints
 Connections Manager
 Data flow
 Source and destination adapters
 Transformations
 Multiple sources with joins and unions
 Multiple destinations with splits and multicast

6. Packages
 Collection of tasks which are executed in an orderly fashion by the
run time engine.
 It is a unit of work which is Retrieved, executed and saved.
 Its an XML file , which can be either saved in Sql Server or in an file
system.
 Can be executed by –
 SQL Server Agent
 DTEXEC Or DTEXECUTil (Command line utility bundled with
SSIS to execute a package, another similar one is DTEXECUI
which has the GUI).

8. Control Flow and Tasks
 Main Workflow of the package.
 Dictates the sequence of execution of the package.
 SSIS provides three types of control flow elements:
 Task is a processing unit responsible for performing a
designated step, such as running T-SQL Command, launching
an external process, handling a file system operation and so on.
 Containers groups and organize tasks logically.
 Precedence constraints connect containers or tasks into one
control flow depending on the outcome of an upstream task.

10. Containers

12. Precedence Constraints
Success
Failure
Complete

13. Connection Managers
 SSIS uses connection managers to integrate different
data sources into packages.

14. Data Flow
 The most important task for moving the data from source to
destination.
 It is a buffer oriented Architecture.
 Created by using different types of data flow elements including:
 Sources that extract data.
 Transformations that modify data.
 Destinations that load data.
 Data Paths that connect the outputs and inputs of data flow
components into a data flow.

16. Event Handling and Logging
 During runtime, events are raised by the containers and tasks.
 Event Handlers perform following tasks:
 Clean up temporary data storage when a package or task
finishes.
 Refresh data in a table when a lookup reference table fails.
 Send an email when an error or warning occurs.

18. Logging
 SQL Server Integration Services includes log providers that you can
use to implement logging in packages, containers, and tasks.
 Logging captures runtime information about the package.
 Log Providers –
 Text File Log Provider.
 SQL Server Profiler Log Provider.
 SQL Server Log Provider.
 XML File log Provider.
 Windows Event Log Provider.

19. Contd..
 Elements in the log Schema:
 Computer- The name of the computer on which the log event
occurred.
 Operator - The identity of the user who launched the package
 SourceName -The name of the container or task in which the
log event occurred
 SourceID - The unique identifier of the package; the For Loop,
Foreach Loop, or Sequence container; or the task in which the
log event occurred.
 ExecutionID - The GUID of the package execution instance.
 MessageText - A message associated with the log entry.
 Data Bytes- A byte array specific to the log entry. The meaning
of this field varies by log entry.

20. Transactions
 SSIS Container types can be configured to use transaction.
 Three Options for configuring transactions:
 Supported – joins any transaction started by the parent
container.
 Not Supported – does not join or start a transaction.
 Required – Starts a transaction, unless one is already started by
the parent. If transaction exists, it joins the existing one.

21. Checkpoints
 SSIS can restart failed packages from the point where it stopped,
instead of running the whole package.
 The information about the package execution is written in a
checkpoint file.
 Checkpoint file restarts the package from the point of failure.
 A package can be restarted only at the Control Flow Level. A
package cannot be restarted in the middle of the data flow.

22. Configuring a package to restart
The following table lists the package properties that you set to
implement checkpoints.
The CheckpointUsage property can be set to the following values:
 Never
 Always
 IfExists

23. Variables
 SSIS supports two types of variables: system and user-defined.
 User-defined variables can be used in many ways in SSIS: in
scripts; in the expressions used by precedence constraints, the For
Loop container, the Derived Column transformation, and the
Conditional Split transformation; and in the property expressions
that update property values.

25. Usage Scenarios
 Property Expressions
 Data Flow expressions
 Precedence constraint Expressions
 Parameters and Return codes
 For Loop
 Package Configuration
 Script tasks

26. Package Debugging
 Control flow
 Breakpoints
 Debug window
 Watch window
 Data flow
 Data viewer
 Row counts

27. Deploying the packages
 SSIS contains a feature called Package Deployment Utility which
allows to assemble the SSIS packages, configurations and
supporting files to deployment folder and builds an executable file.

28. Package Installer Wizard