/// <summary>
/// Format summarize expression
/// </summary>
/// <param name="summarizeExpression">the expression to be formatted</param>
/// <returns>the original expression</returns>
protected override Expression VisitSummarizeExpression(SummarizeExpression summarizeExpression)
{
if (summarizeExpression.AllColumns != null && summarizeExpression.AllColumns.Any())
{
this.Builder.Append("\tSUMMARIZE(\n");
this.Visit(TableFactory.GetTableExpression(summarizeExpression.MainTable));
if (summarizeExpression.Columns.Any())
{
IEnumerable <string> cs =
summarizeExpression.Columns.Select(c => ((ColumnExpression)c.Expression).DbName).Distinct();
string columnString = cs.Aggregate((c1, c2) => c1 + ",\n" + c2);
this.Builder.Append(",");
this.Builder.Append(columnString);
}
if (summarizeExpression.Measures.Any())
{
this.VisitMeasures(summarizeExpression.Measures);
this.Builder.Append(")");
}
else
{
this.Builder.Append(")");
}
}
else
{
return(this.Visit(summarizeExpression.MainTable));
}
return(summarizeExpression);
}