public override void VisitAfter(GroupBy groupBy)
{
for (int i = 0; i < groupBy.Count; ++i)
{
if (IsPlaceHolderExpr(groupBy[i]))
{
groupBy[i] = Place((PlaceHolderExpr)groupBy[i]);
}
}
}
private bool FindInGroupByItems(GroupBy groupBy, ResultInfo resultInfo, int resultInfoIndex)
{
foreach (var groupByExpr in groupBy)
{
if (groupByExpr.GetType() == typeof(Column))
{
var groupByColumn = (Column)groupByExpr;
// SELECT句がGroupByキーか判定するため、SELECT句がColumn型であり、かつそのColumnの
// テーブル別名と列名がGROUPBYキーと一致するかを調べる
if (resultInfo.SourceInfo != null)
{
if (resultInfo.SourceInfo.IsDirectSource(groupByColumn, _ignoreCase))
{
return(true);
}
}
}
else if (groupByExpr.GetType() == typeof(UNumericLiteral) &&
((UNumericLiteral)groupByExpr).TryParseToLong() > 0)
{
if (((UNumericLiteral)groupByExpr).TryParseToLong() == resultInfoIndex + 1)
{
return(true);
}
}
else
{
// GroupBy句がExpressionの場合、SELECTに同等な論理式が存在すればTrueを返す
// 暫定的に同じ文字列か否かで判定する
var stringifier1 = new CompactStringifier(1024);
var stringifier2 = new CompactStringifier(1024);
groupByExpr.Accept(stringifier1);
if (resultInfo.Node != null)
{
resultInfo.Node.Accept(stringifier2);
}
var groupByExprStr = stringifier1.ToString();
var selectItemStr = stringifier2.ToString();
if (string.Compare(groupByExprStr, selectItemStr, _ignoreCase) == 0)
{
return(true);
}
}
}
return(false);
}
virtual public void VisitAfter(GroupBy groupBy)
{
}
virtual public void VisitBefore(GroupBy groupBy)
{
}
public override void VisitAfter(GroupBy groupBy)
{
}
public override void VisitAfter(GroupBy groupBy)
{
--_clauseLevel;
}
public override void VisitBefore(GroupBy groupBy)
{
++_clauseLevel;
}
public void VisitAfter(GroupBy groupBy)
{
_visitor.VisitAfter(groupBy);
}
public void VisitBefore(GroupBy groupBy)
{
_visitor.VisitBefore(groupBy);
}
