private void visitSelect(SelectBuilder item)
{
bool needsParentheses = level > 0;
if (needsParentheses)
{
writer.Write("(");
}
writer.Write("SELECT ");
if (item.Distinct != DistinctQualifier.Default)
{
DistinctQualifierConverter converter = new DistinctQualifierConverter();
writer.Write(converter.ToString(item.Distinct));
writer.Write(" ");
}
if (item.Top != null)
{
IVisitableBuilder top = item.Top;
top.Accept(forSubCommand().forValueContext(ValueReferenceType.Reference));
writer.Write(" ");
}
forValueContext(ValueReferenceType.Declaration).join(", ", item.Projection);
if (item.From.Any())
{
writer.Write(" FROM ");
forSourceContext(SourceReferenceType.Declaration).join(", ", item.From);
}
if (item.WhereFilterGroup.HasFilters)
{
writer.Write(" WHERE ");
IFilter where = item.WhereFilterGroup;
where.Accept(forSubCommand().forValueContext(ValueReferenceType.Reference));
}
if (item.GroupBy.Any())
{
writer.Write(" GROUP BY ");
forValueContext(ValueReferenceType.Reference).join(", ", item.GroupBy);
}
if (item.HavingFilterGroup.HasFilters)
{
writer.Write(" HAVING ");
IFilter having = item.HavingFilterGroup;
having.Accept(forSubCommand().forValueContext(ValueReferenceType.Reference));
}
if (item.OrderBy.Any())
{
writer.Write(" ORDER BY ");
forValueContext(ValueReferenceType.Alias).join(", ", item.OrderBy);
}
if (needsParentheses)
{
writer.Write(")");
}
}
private void visitSelectCombiner(SelectCombiner combiner, string combinerToken)
{
bool needsParenthesis = level > 0;
if (needsParenthesis)
{
writer.Write("(");
}
combiner.LeftHand.Accept(this);
writer.Write(" ");
writer.Write(combinerToken);
writer.Write(" ");
if (combiner.Distinct != DistinctQualifier.Default)
{
DistinctQualifierConverter converter = new DistinctQualifierConverter();
writer.Write(converter.ToString(combiner.Distinct));
writer.Write(" ");
}
combiner.RightHand.Accept(this);
if (combiner.OrderBy.Any())
{
writer.Write(" ORDER BY ");
join(", ", combiner.OrderBy);
}
if (needsParenthesis)
{
writer.Write(")");
}
}
private DistinctQualifier buildDistinctQualifier(MatchResult result)
{
DistinctQualifierConverter converter = new DistinctQualifierConverter();
MatchResult distinct = result.Matches[SqlGrammar.DistinctQualifier.Distinct];
if (distinct.IsMatch)
{
return DistinctQualifier.Distinct;
}
MatchResult all = result.Matches[SqlGrammar.DistinctQualifier.All];
if (all.IsMatch)
{
return DistinctQualifier.All;
}
throw new InvalidOperationException();
}