private CREFModel.NamedExpression TranslateNamedExpression(TranslationContext context, ExpressionDef expression)
{
var result = new CREFModel.NamedExpression();
result.Name = expression.Name;
result.Item = context.TranslateNode(expression.Expression);
return result;
}
private Model.Statement TranslateExpressionDef(SQLTranslationContext context, string artifactName, ExpressionDef expressionDef)
{
var result = new SQLModel.CreateViewStatement();
result.ViewName = context.GetExpressionObjectName(String.Format("{0}.{1}", artifactName, expressionDef.Name));
var translatedExpression = context.TranslateNode(expressionDef.Expression);
if (DataTypes.Equal(expressionDef.Expression.ResultType, DataTypes.Boolean))
{
translatedExpression = SQLTranslationUtilities.PromoteBooleanValuedExpression(translatedExpression);
}
result.Expression = SQLTranslationUtilities.EnsureSelectExpression(translatedExpression);
return result;
}
public void Push(ExpressionDef def)
{
if (def == null)
{
throw new ArgumentNullException("def");
}
if (_stack.Contains(def.Name))
{
throw new InvalidOperationException(String.Format("Reference to expression {0} is invalid because it results in a circular reference.", def.Name));
}
_stack.Push(def.Name);
}
