A Practical Approach to using the Microsoft ... Tabular Model... · How to use Builder Patterns...

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A Practical Approach to using the Microsoft.AnalysisServices.Tabular .Net Library (C#)

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545m USDrevenuesin 2015

4

AboutMe

In Software Development since 1988

Contributions: SQLRelay, SSAS-ASSP, SSIS-BidsHelper

Languages: SQL, MDX, DAX, C# & several defunct ones

JohnMathews

Technologies: RDBMS, MD, Tabular, SSIS, Rule Based Reasoning, State Machines Pipeline Processors

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SSAS2016

TabularObjectModel

Understand the TOM Building Blocks (.NET)

Dynamically create ALL or PART of a Tabular Model

How to use Builder Patterns (C#)

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Marco Russo

“Everything that you know about MDX/Multi-Dimensional

FORGET!”

“Mastering DAX Workshop”Source:

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.NET

Namespace: Microsoft.AnalysisServer.Tabular

C:\Windows\assembly\GAC_MSIL\Microsoft.AnalysisServer.Tabular

https://msdn.microsoft.com/en-us/library/mt707783.aspx

https://msdn.microsoft.com/en-us/library/microsoft.analysisservices.tabular.aspx

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What do you think are the principal TOM compnents?

TOMComponents

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Sort By

TOMComponents

Server

Measure

Calculated Column

Data Column

ModelDatabase

Column

*

1+

Composed of

Type of

Table

*Data

SourceProviderDataSource

KPI

*

Partition

Partition Source

QueryPartitionSource

From

To RelationshipSingleColumnRelationship

Level** Hierarchy

*

*

*

**

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“Code should read like well written prose”

Robert C. Martin (Uncle Bob)

Source: “Clean Code”

Coding

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Server

Composed of

Type of

Server

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Server

public static void BuildTabularModel(ModelOptions modelOptions){

using (var server = ConnectToServer(modelOptions.ConnectionString)){

// do the magic!}

}

Elsa – Disney’s “Frozen”

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Server

using TOM = Microsoft.AnalysisServices.Tabular;

namespace SqlRelayTomExample{

public static class ServerFunctions{

public static TOM.Server ConnectToServer(string connectionString){

var server = new TOM.Server();server.Connect(connectionString);return server;

}}

}

Connection string ONLY specifies the “Data Source”

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Database Collection

using TOM = Microsoft.AnalysisServices.Tabular;

TOM.DatabaseCollection server.Databases

int server.Databases.Count;

TOM.Database server.Databases[idx];

TOM.Database server.Find(string id);TOM.Database server.FindByName(string name);

sever.Databases.Add(TOM.Database database)

!

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Server Database*

Composed of

Type of

Database

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Database

Property Access Description

Name RW Name of the database

Server R The server hosting the database

CompatibilityLevel RW The SSAS compatibility level 1200

ModelType RW MD, Tabular or Default

Model RW Tabular model

StorageEngineMode RW InMemoryMixedTraditionalTabularMetaData

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Builder Patterns

Hide the construction of complex objects

Easily set default or inferred values

Immutable

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Properties

using AS = Microsoft.AnalysisServices;using TOM = Microsoft.AnalysisServices.Tabular;

namespace SqlRelayTomExample{

public class DatabaseBuilder{

private TOM.Server server;private string name;private int compatibilityLevel;private TOM.Model model;private AS.ModelType modelType;private AS.StorageEngineUsed storageEngineUsed;

}}

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Defaults

public class DatabaseBuilder{

private TOM.Server server;private string name;private int compatibilityLevel;private TOM.Model model;private AS.ModelType modelType;private AS.StorageEngineUsed storageEngineUsed;

public DatabaseBuilder(){

this.compatibilityLevel = 1200;this.storageEngineUsed = AS.StorageEngineUsed.TabularMetadata;this.modelType = AS.ModelType.Default;

}

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Cloning

public class DatabaseBuilder{

private TOM.Server server;private string name;private int compatibilityLevel;private TOM.Model model;private AS.ModelType modelType;private AS.StorageEngineUsed storageEngineUsed;

private DatabaseBuilder(DatabaseBuilder bldr){

this.name = bldr.name;this.server = bldr.server;this.compatibilityLevel = bldr.compatibilityLevel;this.model = bldr.model;this.modelType = bldr.modelType;this.storageEngineUsed = bldr.storageEngineUsed;

}

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Custom-ising

public class DatabaseBuilder{

private TOM.Server server;private string name;private int compatibilityLevel;private TOM.Model model;private AS.ModelType modelType;private AS.StorageEngineUsed storageEngineUsed;

public DatabaseBuilder Name(string value){

return new DatabaseBuilder(this) { name = value };}

public DatabaseBuilder Server(TOM.Server value){

return new DatabaseBuilder(this) { server = value };}

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Creating

public class DatabaseBuilder{

public static implicit operator TOM.Database(DatabaseBuilder bldr){

var database = new TOM.Database(bldr.modelType, bldr.compatibilityLevel)

{Name = bldr.name,StorageEngineUsed = bldr.storageEngineUsed,Model = bldr.model

};

bldr.server?.Databases.Add(database);

return database;}

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Using

public static void BuildTabularModel(ModelOptions modelOptions){

using (var server =ConnectToServer(modelOptions.ConnectionString))

{

}}

TOM.Database database =new DatabaseBuilder()

.Server(server)

.Name(modelOptions.DatabaseName);

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Server ModelDatabase*

Composed of

Type of

Model

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Model

Property Access Description

Name RW Name of the model

Database R The database hosting the model

DefaultMode RW How AS gets its data:-DefaultDirectQueryImport

Culture RW The language (locale) culture “en-us”

DataSources (RW) Collection of data sources

Tables (RW) Collection of tables

Relationships (RW) Collection of relationships

(RW) = Data accessed via Add(), Find() methods

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Model

public class ModelBuilder{

private string name;private TOM.Database database;private TOM.ModeType defaultMode;private string culture;

private readonly List<TOM.DataSource> dataSources =new List<TOM.DataSource>();

private readonly List<TOM.Table> tables = new List<TOM.Table>();

private readonly List<TOM.Relationship> relationships =new List<TOM.Relationship>();

public ModelBuilder(){

this.defaultMode = TOM.ModeType.Import;this.culture = "en-us";

}

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private ModelBuilder(ModelBuilder bldr){

this.name = bldr.name;this.database = bldr.database;this.defaultMode = bldr.defaultMode;this.culture = bldr.culture;this.dataSources.AddRange(bldr.dataSources);this.tables.AddRange(bldr.tables);this.relationships.AddRange(bldr.relationships);

}

Model

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public ModelBuilder AddDataSource(TOM.DataSource value){

return AddDataSources(new[] { value });}

public ModelBuilder AddDataSources(IEnumerable<TOM.DataSource> value)

{var clone = new ModelBuilder(this);clone.dataSources.AddRange(value);return clone;

}

Model

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Model

public static implicit operator TOM.Model(ModelBuilder bldr){

var model = new TOM.Model(){

Name = bldr.name,DefaultMode = bldr.defaultMode,Culture = bldr.culture

};

foreach (var ds in bldr.dataSources)model.DataSources.Add(ds);

foreach (var tab in bldr.tables)model.Tables.Add(tab);

foreach (var rel in bldr.relationships)model.Relationships.Add(rel);

if (bldr.database != null) bldr.database.Model = model;

return model;}

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Model

public static void BuildTabularModel(ModelOptions modelOptions)

{using (var server =

ConnectToServer(modelOptions.ConnectionString)){

TOM.Database database =new DatabaseBuilder()

.Server(server)

.Name(modelOptions.DatabaseName)

.Model(new ModelBuilder()));

}}

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Server ModelDatabase*

Composed of

Type of

*Data

SourceProviderDataSourceProvider

DataSource

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ProviderData

Source

Property Access Description

Name RW Name of the data source

Description RW A description (rationale) of the data source

Provider RW The data source provider “SQLNCLI11”

Model R The model hosting the data source

ConnectionString RW Connection string

ImpersonationMode RW ImpersonateAccountImpersonateServiceAccount

Timeout RW Command timeout 3600

Isolation RW Command isolation ReadCommitted

Annotations (RW) Additional key-value pair properties for the data source:“ConnectionEditUISource” : “SqlServer”

(RW) = Data accessed via Add(), Find() methods

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public DataSourceBuilder(){

this.impersonationMode =TOM.ImpersonationMode.ImpersonateServiceAccount;

this.isolation =TOM.DatasourceIsolation.ReadCommitted;

this.annotations.Add(new AnnotationBuilder()

.Name("ConnectionEditUISource")

.Value("SqlServer"));

this.provider = "SQLNCLI11";

this.timeout = 3600;}

ProviderData

Source

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Model

public static void BuildTabularModel(ModelOptions modelOptions){

using (var server = ConnectToServer(modelOptions.ConnectionString)){

TOM.Database database =new DatabaseBuilder()

.Server(server)

.Name(modelOptions.DatabaseName)

.Model(new ModelBuilder()

.AddDataSource(new DataSourceBuilder()

.Name(modelOptions.DsName)

.Description(modelOptions.DsDescription)

.ConnectionString(modelOptions.DsConString))

);}

}

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Server ModelDatabase*

Composed of

Type of

*Data

SourceProviderDataSource

Table

Table

*

1+

Partition

Partition Source

QueryPartitionSource

*

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Property Access Description

Name RW Name of the table

Description RW A description (rationale) of the table

Model R The model hosting the table

IsHidden RW Should the table be hidden from clients

Columns (RW) Collection of columns within the table

Partitions (RW) Collection of partitions for the table

Measures (RW) Collection of measures

Annotations (RW) “_TM_ExtProp_QueryDefinition”

“_TM_ExtProp_DbSchemaName”

“_TM_ExtProp_DbTableName”

(RW) = Data accessed via Add(), Find() methods

Table

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Table

Partitions Case

Partitions specified

Use partitions

Create FULL partition

default

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Partition

Property Access Description

Name RW Name of the partition

Description RW Description of the partition

Source RW The PartitionSource to get the data

Mode RW Can override the DefaultMode in the Model. Default

Table R The parent table

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Query Partition Source

Property Access Description

Query RW The SQL query to get the data

Partition R The parent partition

DataSource RW The data source, within the model, that is to be used

(RW) = Data accessed via Add(), Find() methods

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Server ModelDatabase*

Composed of

Type of

*Data

SourceProviderDataSource

Column

Table

*

1+

Partition

Partition Source

QueryPartitionSource

*

Calculated Column

Data Column

Column

*

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Property Access Description

Name RW Name of the column

Description RW A description (rationale) of the table

DataType RW The DAX data type

Table R The table that the column belongs to

FormatString RW Format string for visualisation

Is… RW AvailableInMdx, DefaultImage, DefaultLabel,Hidden, Key, Nullable, Unique

SummarizeBy RW The default aggregation to be applied to the column

SortByColumn RW The column used to sort this column

Annotations (RW) XML format annotation “Format”

(RW) = Data accessed via Add(), Find() methods

Column

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Property Access Description

SourceColumn RW Name of the column within the source table

SourceProviderType RW The data type of the source column

Data Column

TOM.DataType SourceProviderType (for SQLNCLI11)

Boolean “Bit”

String “WChar”

Double “Real”

Int64 “SmallInt”, “Int”, “BigInt”

DateTime “DBDate”, “DBTimeStamp”

Decimal “Numeric”

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CalculatedColumn

Property Access Description

Expression RW DAX expression

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DataType SourcePropertyType

Value of “Format” annotation

DateTime dbdate <Format Format="DateTimeCustom"><DateTimes><DateTimeLCID="2057" Group="ShortDate" FormatString="yyyy-MM-dd"/></DateTimes></Format>

dbtimestamp <Format Format="DateTimeCustom"><DateTimes><DateTimeLCID="2057" Group="GeneralLongDateTime" FormatString="yyyy-MM-ddHH:mm:ss"/></DateTimes></Format>

otherwise <Format Format="DateTimeGeneral" />

Text n/a <Format Format="Text" />

otherwise n/a <Format Format="General" />

Column

“Format” annotation

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Useselect *

default

Table

Extract schema from sourceTableName

“_TM_ExtProp_DbTableName”

“_TM_ExtProp_DbSchemaName”

Extract table from sourceTableName

“_TM_ExtProp_QueryDefinition” Case

sqlStatementhas a value

Use sqlStatement

columnscontains

DataColumns

UseSelect

<col-list>private string sourceTableName;private string sqlStatement;

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Creatingthe Model

Customers

CustomerId int

FirstName nvarchar(50)

LastName nvarchar(50)

Products

ProductId int

ProductName nvarchar(50)

ProductCategory nvarchar(50)

ProductUnitPrice money

SaleDates

SaleDate date

SaleYear smallint

SaleMonthNo smallint

SaleDayOfMonth smallint

SaleMonthShortName nchar(3)

SaleYearMonth int (calc)

Sales

CustomerId int

ProductId int

SalesDate date

SalesQuantity int

SalesAmount measure

*

**

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Creatingthe Model

public static void BuildTabularModel(ModelOptions modelOptions){

using (var server = ConnectToServer(modelOptions.ConnectionString)){

}}

TOM.DataSource dataSource = new DataSourceBuilder().Name(modelOptions.DataSourceName).Description(modelOptions.DataSourceDescription)

.ConnectionString(modelOptions.DataSourceConnectionString);

TOM.Database database =new DatabaseBuilder()

.Server(server)

.Name(modelOptions.DatabaseName)

.Model(new ModelBuilder()

.AddDataSource(dataSource)

.AddTables(CreateTables(dataSource)));

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Creatingthe Model

private static IEnumerable<TOM.Table> CreateTables(TOM.DataSource dataSource){

return new TOM.Table[]{

new TableBuilder().DataSource(dataSource).Name("Customers").SourceTableName("dbo.Customers").Description("Details of the customers").Columns(

new TOM.Column[]{

new DataColumnBuilder().Name("CustomerId").Description("Internal id a customer").DataType(TOM.DataType.Int64).SourceColumnName("CustomerId").SourceProviderType("Int").IsNullable(false).IsKey(true).IsUnique(true),

new DataColumnBuilder().Name("FirstName").Description("The first name of the customer").DataType(TOM.DataType.String).SourceColumnName("FirstName").SourceProviderType("WChar").IsNullable(false),

new DataColumnBuilder().Name("LastName").Description("The last name of the customer").DataType(TOM.DataType.String).SourceColumnName("LastName").SourceProviderType("WChar").IsNullable(false),

}),// etc.

};}

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Creatingthe Model

private static IEnumerable<TOM.Table> CreateTables(TOM.DataSource dataSource){

return new TOM.Table[]{

new TableBuilder().DataSource(dataSource).Name("Customers").SourceTableName("dbo.Customers").Description("Details of the customers").Columns(

new TOM.Column[]{

new DataColumnBuilder().Name("CustomerId").Description("Internal id a customer").DataType(TOM.DataType.Int64).SourceColumnName("CustomerId").SourceProviderType("Int").IsNullable(false).IsKey(true).IsUnique(true),

new DataColumnBuilder().Name("FirstName").Description("The first name of the customer").DataType(TOM.DataType.String).SourceColumnName("FirstName").SourceProviderType("WChar").IsNullable(false),

new DataColumnBuilder().Name("LastName").Description("The last name of the customer").DataType(TOM.DataType.String).SourceColumnName("LastName").SourceProviderType("WChar").IsNullable(false),

}),// etc.

};}

TOO MUCH DUPLICATION

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Creatingthe Model

private static IEnumerable<TOM.Table> CreateTables(TOM.DataSource dataSource){

return new TOM.Table[]{

new TableBuilder().DataSource(dataSource).Name("Customers").SourceTableName("dbo.Customers").Description("Details of the customers").Columns(

new TOM.Column[]{

new DataColumnBuilder().Name("CustomerId").Description("Internal id a customer").DataType(TOM.DataType.Int64).SourceColumnName("CustomerId").SourceProviderType("Int").IsNullable(false).IsKey(true).IsUnique(true),

new DataColumnBuilder().Name("FirstName").Description("The first name of the customer").DataType(TOM.DataType.String).SourceColumnName("FirstName").SourceProviderType("WChar").IsNullable(false),

new DataColumnBuilder().Name("LastName").Description("The last name of the customer").DataType(TOM.DataType.String).SourceColumnName("LastName").SourceProviderType("WChar").IsNullable(false),

}),// etc.

};}

Can set default values

Are Immutable

Builder Patterns:-

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Creatingthe Model

private static IEnumerable<TOM.Table> CreateTables(TOM.DataSource dataSource){

var tableBldr = new TableBuilder().DataSource(dataSource);

var stringNotNullDataColBldr = new DataColumnBuilder().IsNullable(false).DataType(TOM.DataType.String).SourceProviderType("WChar");

var decimalNotNullDataColBldr = new DataColumnBuilder().IsNullable(false).DataType(TOM.DataType.Decimal).SourceProviderType(“Numeric");

var intNotNullDataColBldr = new DataColumnBuilder().IsNullable(false).DataType(TOM.DataType.Int64).SourceProviderType("Int");

var intIdNotNullDataColBldr =intNotNullDataColBldr.SummarizeBy(TOM.AggregationFunction.None)

var dateNotNullDataColBldr = new DataColumnBuilder().IsNullable(false).DataType(TOM.DataType.DateTime).SourceProviderType(“DBDate");

var intNotNullCalcColBldr = new CalculatedColumnBuilder().DataType(TOM.DataType.Int64).IsNullable(false);

52

Creatingthe Model

private static IEnumerable<TOM.Table> CreateTables(TOM.DataSource dataSource){

var tableBldr = new TableBuilder().DataSource(dataSource);

var stringNotNullDataColBldr = new DataColumnBuilder().IsNullable(false).DataType(TOM.DataType.String).SourceProviderType("WChar");

var decimalNotNullDataColBldr = new DataColumnBuilder().IsNullable(false).DataType(TOM.DataType.Decimal).SourceProviderType(“Numeric");

var intNotNullDataColBldr = new DataColumnBuilder().IsNullable(false).DataType(TOM.DataType.Int64).SourceProviderType("Int");

var intIdNotNullDataColBldr =intNotNullDataColBldr.SummarizeBy(TOM.AggregationFunction.None)

var dateNotNullDataColBldr = new DataColumnBuilder().IsNullable(false).DataType(TOM.DataType.DateTime).SourceProviderType(“DBDate");

var intNotNullCalcColBldr = new CalculatedColumnBuilder().DataType(TOM.DataType.Int64).IsNullable(false);

STILL TOO MUCH DETAIL

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Creatingthe Model

private static IEnumerable<TOM.Table> CreateTables(TOM.DataSource dataSource){

var bldrs = new TomBuilderModel(dataSource);

return new TOM.Table[]{

bldrs.TableBuilder.Name("Customers").SourceTableName("dbo.Customers").Description("Details of the customers").Columns(

new TOM.Column[]{

bldrs.IntIdNotNullDataColBldr.Name("CustomerId").Description("Internal id a customer").IsKey(true).IsUnique(true),

bldrs.StringNotNullDataColBldr.Name("FirstName").Description("The first name of the customer"),

bldrs.StringNotNullDataColBldr.Name("LastName").Description("The last name of the customer")

}),

54

Creatingthe Model

bldrs.TableBuilder.Name("SaleDates").SourceTableName("dbo.SaleDates").Columns(

new TOM.Column[]{

bldrs.IntIdNotNullDataColBldr.Name("SaleDate").IsKey(true).IsUnique(true),

bldrs.IntIdNotNullDataColBldr.Name("SaleYear"),

bldrs.IntIdNotNullDataColBldr.Name("SaleMonthNo"),

bldrs.IntIdNotNullDataColBldr.Name("SaleDayOfMonth"),

bldrs.StringNotNullDataColBldr.Name("SaleMonthShortName"),

})

55

Creatingthe Model

TOM.Column saleMonthNoColumn =bldrs.IntIdNotNullDataColBldr.Name("SaleMonthNo");

bldrs.TableBuilder.Name("SaleDates").SourceTableName("dbo.SaleDates").Columns(

new TOM.Column[]{

bldrs.IntIdNotNullDataColBldr.Name("SaleDate").IsKey(true).IsUnique(true),

bldrs.IntIdNotNullDataColBldr.Name("SaleYear"),

saleMonthNoColumn,

bldrs.IntIdNotNullDataColBldr.Name("SaleDayOfMonth"),

bldrs.StringNotNullDataColBldr.Name("SaleMonthShortName").SortBy(saleMonthNoColumn),

})

bldrs.IntNotNullCalcColBldr.Name("SaleYearMonth").SummarizeBy(TOM.AggregateFunction.None).Dax("(SaleDates[SaleYear] * 100) + SaleDates[SaleMonthNo]")

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Server ModelDatabase*

Composed of

Type of

*Data

SourceProviderDataSource

Measure

Table

*

1+

Partition

Partition Source

QueryPartitionSource

*

Calculated Column

Data Column

Column

*

Measure

*

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Property Access Description

Name RW Name of the measure

Description RW A description (rationale) of the measure

Expression RW The DAX expression

Table R The table that the measure belongs to

FormatString RW The display format of the result

IsHidden RW Is measure hidden from clients

Kpi RW The KPI associated with this measure

(RW) = Data accessed via Add(), Find() methods

Measures

Property Description

DeleteExisting Use this definition to replace an existing one

58

Creatingthe Model

bldrs.TableBuilder.Name("Sales").SourceTableName("dbo.Sales").Columns(

new TOM.Column[]{

bldrs.DateNotNullDataColBldr.Name("SaleDate"),bldrs.IntIdNotNullDataColBldr.Name("CustomerId"),bldrs.IntIdNotNullDataColBldr.Name("ProductId")

})

)

.AddMeasure(new MeasureBuilder()

.Name("SalesAmount")

.Dax("SUMX(Sales, Sales[Quantity] * RELATED(Products[ProductUnitPrice]))")

)

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Server ModelDatabase*

Composed of

Type of

*Data

SourceProviderDataSource

Measure

Table

*

1+

Partition

Partition Source

QueryPartitionSource

*

Calculated Column

Data Column

Column

*

Measure

*

Level** Hierarchy

*

60

Property Access Description

Name RW Name of the hierarchy

Description RW Description (rationale) of the hierarchy

IsHidden RW Is the hierarchy to be hidden from clients

Table R The parent table

Levels (RW) Ordered list of levels within the hierarchy

Hierarchy

61

Property Access Description

Name RW Name of the level

Description RW Description (rationale) of the level

Column RW The column to be shown for this level

Ordinal RW The ordinal (zero-based) of the column within the hierarchy

Hierarchy R Ordered list of levels within the hierarchyLevel

62

Creatingthe Model

var model = database.Model;var saleDatesTable = model.Tables.Find("SaleDates");

salesTable.Hierarchies.Add(new HierarchyBuilder().Name("Calendar")

.Levels(new TOM.Level[]{

new LevelBuilder().Name("Year").Ordinal(0).Column(saleDatesTable.Columns.Find("SaleYear")),

new LevelBuilder().Name("Month").Ordinal(1).Column(saleDatesTable.Columns.Find("SaleMonthNo")),

new LevelBuilder().Name("Day").Ordinal(2).Column(saleDatesTable.Columns.Find("SaleDayOfMonth")),

})

);

63

*

Server ModelDatabase*

Composed of

Type of

*Data

SourceProviderDataSource

Measure

Table

*

1+

Partition

Partition Source

QueryPartitionSource

*

Calculated Column

Data Column

Column

*

Measure

* *From

To RelationshipSingleColumnRelationship

Level*

*

Hierarchy

64

Property Access Description

Name RW Name of the relationship

CrossfilteringBehavior RW The filtering mode OneDirection

FromCardinality RW The cardinality on the fact end Many

FromColumn RW The fact column – cannot be an orphan

ToCardinality RW The cardinality on the reference end One

ToColumn RW The reference column – cannot be an orphan

IsActive RW Is this relationship active True

Relation-ship

Many : Many relationships are not supported

65

Creatingthe Model

var model = database.Model;var relBldr = new RelationshipBuilder();var relationships = new TOM.Relationship[]{

relBldr..FromColumn(ModelBuilder.FindColumn(model, "'Sales'[CustomerId]")).ToColumn(ModelBuilder.FindColumn(model, "'Customers'[CustomerId]")),

relBldr..FromColumn(ModelBuilder.FindColumn(model, "'Sales'[ProductId]")).ToColumn(ModelBuilder.FindColumn(model, "'Products'[ProductId]")),

relBldr..FromColumn(ModelBuilder.FindColumn(model, "'Sales'[SalesDateId]")).ToColumn(ModelBuilder.FindColumn(model, "'SalesDates'[SalesDateId]")),

};

Parse qualified column name to:• lookup up table in model• then column in table

66

Processing

Deploying

Refresh is the new Process

public static void UpdateDatabase(TOM.Database database){

database.Update(UpdateOptions.ExpandFull, UpdateMode.UpdateOrCreate);}

RequestRefresh() on Model, Table or Partition

database.Model.RequestRefresh(TOM.RefreshType.Full);

database.Model.SaveChanges(TOM.SaveFlags.Default);

67

Summary DEMO

68

Summary

Knowledge TOM’s core classes and their properties and relationships

Thank you & Please give feedback: sqlrelay.co.uk/feedback

Builder Patterns – defaults, immutable, hide complexity

It’s not just theory