/// <summary>
/// Renders the clause in textual representation.
/// </summary>
/// <param name="writer">to output to</param>
/// <param name="optionalWhereClause">where clause if present, or null</param>
/// <param name="formatter">for newline-whitespace formatting</param>
public void ToEPL(
TextWriter writer,
Expression optionalWhereClause,
EPStatementFormatter formatter)
{
formatter.BeginMerge(writer);
writer.Write("merge ");
writer.Write(WindowName);
if (OptionalAsName != null)
{
writer.Write(" as ");
writer.Write(OptionalAsName);
}
if (InsertNoMatch != null)
{
writer.Write(" ");
InsertNoMatch.ToEPL(writer);
}
else
{
if (optionalWhereClause != null)
{
formatter.BeginMergeWhere(writer);
writer.Write("where ");
optionalWhereClause.ToEPL(writer, ExpressionPrecedenceEnum.MINIMUM);
}
foreach (var item in MatchItems)
{
item.ToEPL(writer, formatter);
}
}
}