Biml for Beginners: Generating SSIS packages with BimlScript. Cathrine Wilhelmsen September 5th 2015

Transcription

1 Biml for Beginners: Generating SSIS packages with BimlScript Cathrine Wilhelmsen September 5th 2015

2 Session description SSIS is a powerful tool for extracting, transforming and loading data, but creating the actual SSIS packages can be both tedious and timeconsuming. Even if you use templates and follow best practices you often have to repeat the same steps over and over again. There are no easy ways to handle metadata and schema changes, and if there are new requirements you might have to go through all the packages one more time. It's time to bring the Don't Repeat Yourself principle to SSIS development. In this session I will use the free BIDS Helper add-in to show you the basics of Biml and BimlScript, how to generate SSIS packages automatically from databases, how easy those packages can be changed, and how to move common code to separate files that can be included where needed. See why they say Biml allows you to complete in a day what once took more than a week!

3 Cathrine Wilhelmsen Data Warehouse Architect Business Intelligence cathrinewilhelmsen.net

4 Who are you? (*) SSIS and ETL Developer? Easily bored? Tired of repetitive work? ( * Probably not a cat )

5 Why are you here? Long development time? Many SSIS packages? Slow GUI editor? (Drag, drop, drag, drop, connect, drag, drop, connect, resize, align, drag, drop, resize, connect, align )

6 Have you ever experienced this? new standards job done! yay

7 Ready for a change?

8 Business Intelligence Markup Language Easy to read and write XML dialect Specifies business intelligence objects Databases, schemas, tables, columns SSIS packages SSAS cubes, facts, dimensions (Mist only)

9 Highlights in Biml History 2008: 2009: 2011: 2012: 2014: 2015: founded by Scott Currie, Biml was extended with Biml compiler added to is launched founded is launched is born

10 How can Biml help you? Timesaving: Many SSIS Packages from one Biml file Reusable: Write once and run on any platform ( ) Flexible: Start simple, expand as you learn (Of course I can create 200 packages! What do you need me to do after lunch?)

11 What do you need?

12 How does it work? Generated packages are indistinguishable from manually created packages

13 Biml syntax <Biml xmlns=" <Packages> <Package Name="EmptyPackage1"></Package> <Package Name="EmptyPackage2"/> </Packages> </Biml>

14 Biml syntax: Root Element <Biml xmlns=" <Packages> <Package Name="EmptyPackage1"></Package> <Package Name="EmptyPackage2"/> </Packages> </Biml>

15 Biml syntax: Collection of Elements <Biml xmlns=" <Packages> <Package Name="EmptyPackage1"></Package> <Package Name="EmptyPackage2"/> </Packages> </Biml>

16 Biml syntax: Elements <Biml xmlns=" <Packages> <Package Name="EmptyPackage1"></Package> <Package Name="EmptyPackage2"/> </Packages> </Biml>

17 Biml syntax: Attributes <Biml xmlns=" <Packages> <Package Name="EmptyPackage1"></Package> <Package Name="EmptyPackage2"/> </Packages> </Biml>

18 Biml syntax: Full vs. Shorthand Syntax <Biml xmlns=" <Packages> <Package Name="EmptyPackage1"></Package> <Package Name="EmptyPackage2"/> </Packages> </Biml>

19 Demo Biml

20 Getting started with Biml 1. Download and install BIDS Helper ( 2. Right-click on SSIS project and click Add New Biml File

21 Intellisense Intellisense while typing CTRL+Space to AutoComplete or show Intellisense

22 Errors Red squiggly line: Error Blue squiggly line: Missing attribute or child element Missing attribute: ConstraintMode Error spelling

23 Errors Hovering over errors will show descriptive text Missing attribute: ConstraintMode Error spelling

24 Right-click to Check Biml for Errors

25 Your first SSIS Package from Biml Right-click on Biml file and click Generate SSIS Packages Packages will appear under SSIS Packages

26 From Biml to SSIS

27 From Biml to SSIS

28 .biml vs.dtsx: human-readable vs ALL THE CODE! (150% zoom) (20% zoom)

29 I create SSIS packages faster than that

30 But wait!

31 The magic is in the Extend Biml with C# or VB.NET code blocks Import database structure and metadata Loop over tables and columns Add expressions to replace static values Allows you to control and manipulate Biml code

32 BimlScript code blocks #> Directives (Instructions to the BimlCompiler) <# #> Control Blocks (Control logic) <#= #> Expression Control Blocks (Replace block with string value) <#+ #> Class Feature Control Blocks (Create helper methods)

33 BimlScript syntax <Biml xmlns=" <Packages> <# foreach (var table in RootNode.Tables) { #> <Package Name="Load<#=table.Name#>"></Package> <# } #> </Packages> </Biml>

34 BimlScript syntax: Control Blocks <Biml xmlns=" <Packages> <# foreach (var table in RootNode.Tables) { #> <Package Name="Load<#=table.Name#>"></Package> <# } #> </Packages> </Biml>

35 BimlScript syntax: Expression Control Block <Biml xmlns=" <Packages> <# foreach (var table in RootNode.Tables) { #> <Package Name="Load<#=table.Name#>"></Package> <# } #> </Packages> </Biml>

36 How does it work?

37 Yes, but how does it work? 37

38 Yes, but how does it actually work? <Biml xmlns=" <Packages> <# foreach (var table in RootNode.Tables) { #> <Package Name="Load<#=table.Name#>"></Package> <# } #> </Packages> </Biml> <Biml xmlns=" <Packages> <Package Name="LoadCustomer"></Package> <Package Name="LoadProduct"></Package> <Package Name="LoadSales"></Package> </Packages> </Biml>

39 Demo BimlScript

40 Basic for loop <Packages> <# for (int count = 1; count <= 5; count++) { #> <Package Name="Load_Person_Person_<#=count#>"> </Package> <# } #> </Packages>

41 foreach (table in a database) loop <#@ import namespace="varigence.hadron.corelowerer.schemamanagement" #> <# var conaw2014 = SchemaManager.CreateConnectionNode("AW2014", "Data Source..."); #> <# var AW2014DB = conaw2014.importdb("","", ImportOptions.ExcludeViews); #> <Packages> <# foreach (var table in AW2014DB.TableNodes) { #> <Package Name="Load_<#=table.Schema#>_<#=table.Name#>"> </Package> <# } #> </Packages>

42 Don't Repeat Yourself Move common code to separate files Centralize and reuse in many projects Update code once for all projects 1. Split and combine Biml files 2. Include files 3. CallBimlScript with parameters

43 Split and combine Biml files Solve logical dependencies and simulate manual workflows by using tiers Tiers instruct the BimlCompiler to compile files from lowest to highest tier template tier="1" #> Higher tiers can use and might depend on objects from lower tiers Example: Tier 1 - Create database connections Tier 2 - Create loading packages Tier 3 - Create master package to execute loading packages

44 Split and combine Biml files 2 1. Create Biml files with specified tiers 1 2. Select all the tiered Biml files 3. Right-click and click Generate SSIS Packages 3

45 Behind the scenes: Split and combine Biml files template tier="0" #> <Connections> <Databases> <Schemas> template tier="1" #> <Tables> <Columns> RootNode template tier="2" #> <Packages>

46 Behind the scenes: Split and combine Biml files template tier="0" #> <Connections> <Databases> <Schemas> template tier="1" #> <Tables> <Columns> compile RootNode <Connections> <Databases> <Schemas> template tier="2" #> <Packages>

47 Behind the scenes: Split and combine Biml files template tier="0" #> <Connections> <Databases> <Schemas> template tier="1" #> <Tables> <Columns> use RootNode <Connections> <Databases> <Schemas> template tier="2" #> <Packages>

48 Behind the scenes: Split and combine Biml files template tier="0" #> <Connections> <Databases> <Schemas> template tier="1" #> <Tables> <Columns> compile RootNode <Connections> <Databases> <Schemas> <Tables> <Columns> template tier="2" #> <Packages>

49 Behind the scenes: Split and combine Biml files template tier="0" #> <Connections> <Databases> <Schemas> template tier="1" #> <Tables> <Columns> RootNode <Connections> <Databases> <Schemas> <Tables> <Columns> template tier="2" #> <Packages> use

50 Behind the scenes: Split and combine Biml files template tier="0" #> <Connections> <Databases> <Schemas> template tier="1" #> <Tables> <Columns> RootNode <Connections> <Databases> <Schemas> <Tables> <Columns> <Packages> template tier="2" #> <Packages> compile

51 Behind the scenes: Split and combine Biml files template tier="0" #> <Connections> <Databases> <Schemas> template tier="1" #> <Tables> <Columns> RootNode <Connections> <Databases> <Schemas> <Tables> <Columns> <Packages> generate template tier="2" #> <Packages>

52 Behind the scenes: Split and combine Biml files template tier="0" #> <Connections> <Databases> <Schemas> template tier="1" #> <Tables> <Columns> RootNode template tier="2" #> <Packages>

53 Don't Repeat Yourself: Include files Include common code in multiple files and projects Can include many file types:.biml.txt.sql.cs Use the include directive include file="commoncode.biml" #> The include directive will be replaced by the content of the included file Include pulls code from the included file into the main file

54 Don't Repeat Yourself: Include files

55 Don't Repeat Yourself: CallBimlScript with parameters Works like a parameterized include File to be called (callee) specifies the input parameters it accepts <#@ property name="table" type="asttablenode" #> File that calls (caller) passes input parameters <#=CallBimlScript("CommonCode.biml", Table)#> CallBimlScript pushes parameters from the caller to the callee, and the callee returns code

56 Don't Repeat Yourself: CallBimlScript with parameters

57 Don't Repeat Yourself: CallBimlScript with parameters

58 Demo

59 View compiled Biml Credits: Marco Schreuder Helper file with high tier (tier="100") Saves output of RootNode.GetBiml() to file

60 What do you do next? 1. Download BIDS Helper 2. Identify your SSIS patterns 3. Rewrite one SSIS package to Biml to learn the basics 4. Expand with BimlScript 5. Get involved in the Biml community

61 Biml on Monday... BimlBreak the rest of the week

62 More Biml! Don't miss Rasmus Reinholdt's session Building a meta-driven near realtime ETL solution with BIML and SSIS at 14:55! and come chat with us in the breaks

63 Thank you! cathrinewilhelmsen.net Biml resources over there! slideshare.net/cathrinewilhelmsen no.linkedin.com/in/cathrinewilhelmsen