public ForEachFederationExpressionBuilder(IMigrationContext context, ForEachFederationExpression expression)
{
_expression = expression;
expression.Context = new MigrationContext (context.Conventions, context.QuerySchema,
context.MigrationAssembly,
context.ApplicationContext);
}
public override string Generate(ForEachFederationExpression expression)
{
throw new NotSupportedException("Currently only Azure databases support data federation.");
}
public void Process(ForEachFederationExpression expression)
{
UseFederationExpression useRootFederation = new UseFederationExpression {UseRoot = true};
Process (useRootFederation);
DataTable federations = Read(m_forEachFederationSql, expression.Federation).Tables[0];
foreach (DataRow row in federations.Rows)
{
string range = row["range_low"].ToString();
string distribution = row["distribution_name"].ToString();
UseFederationExpression useFederationExpression = new UseFederationExpression
{
DistributionName = distribution,
Name = expression.Federation,
DistributionValue = range
};
Process(useFederationExpression);
foreach (IMigrationExpression innerExpression in expression.Context.Expressions)
{
innerExpression.ExecuteWith (this);
}
}
}
public IForEachFederationExpressionBuilder Federation(string name)
{
var expression = new ForEachFederationExpression{Federation = name};
_context.Expressions.Add(expression);
return new ForEachFederationExpressionBuilder(_context, expression);
}