public SingleQuery(SingleQueryClause singleQueryClause
, OrderBy orderBy
, ILimitClause limit)
: this(singleQueryClause.Quantifier
, singleQueryClause.HasTop
, singleQueryClause.Top
, singleQueryClause.HasWildcard
, singleQueryClause.Results
, singleQueryClause.From
, singleQueryClause.Where
, singleQueryClause.GroupBy
, singleQueryClause.Having
, orderBy
, limit
, singleQueryClause.Comments)
{
}
void IVisitor.VisitOnWhere(SingleQueryClause queryClause, int offset)
{
this.ParentExists(queryClause);
}
//void IVisitor.VisitBefore(BracketedQuery bracketedQuery) {
// this.ParentExists(bracketedQuery);
//}
//void IVisitor.VisitBefore(CompoundQuery compoundQuery) {
// this.ParentExists(compoundQuery);
//}
//void IVisitor.VisitBefore(SingleQuery query) {
// this.ParentExists(query);
//}
void IVisitor.VisitBefore(SingleQueryClause queryClause)
{
this.ParentExists(queryClause);
}
//void IVisitor.VisitAfter(BracketedQuery bracketedQuery) {
// this.ParentExists(bracketedQuery);
//}
//void IVisitor.VisitAfter(CompoundQuery compoundQuery) {
// this.ParentExists(compoundQuery);
//}
//void IVisitor.VisitAfter(SingleQuery query) {
// this.ParentExists(query);
//}
void IVisitor.VisitAfter(SingleQueryClause queryClause)
{
this.ParentExists(queryClause);
}
public override Assignments GetAssignments(int index)
{
// テーブル列名の指定がない場合は、空のAssignmentsを返す
if (this.Columns == null || this.Columns.Count == 0)
{
return(new Assignments());
}
// Compound Queryの場合は空のAssignmentsを返す
SingleQueryClause singleQuery = null;
if (this.Query.Type == QueryType.Compound)
{
return(new Assignments());
}
else if (this.Query.Type == QueryType.Bracketed)
{
IQueryClause query = ((BracketedQuery)this.Query).Operand;
// 括弧を剥ぐ
while (query.Type == QueryType.Bracketed)
{
query = ((BracketedQueryClause)query).Operand;
}
if (query.Type != QueryType.Single)
{
return(new Assignments());
}
singleQuery = (SingleQueryClause)query;
}
else
{
singleQuery = (SingleQuery)this.Query;
}
// SELECT *の場合は空のAssignmentsを返す
if (singleQuery.HasWildcard)
{
return(new Assignments());
}
// テーブル列名とSELECT句の要素数が異なる場合はエラーとする
if (this.Columns.Count != singleQuery.Results.Count)
{
throw new InvalidASTStructureError("テーブル列名とSELECT句の要素数が異なります");
}
var ret = new Assignments();
for (var i = 0; i < Columns.Count; ++i)
{
var column = new Column(this.Columns[i].Name);
var result = singleQuery.Results[i];
// SELECT句にTable WildCardが含まれる場合は、空のAssignmentsを返す
if (result.IsTableWildcard)
{
return(new Assignments());
}
var value = ((ResultExpr)result).Value;
var assignment = new Assignment(column, value);
ret.Add(assignment);
}
return(ret);
}
internal SingleQuery(SingleQueryClause singleQueryClause)
: this(singleQueryClause
, new OrderBy()
, null)
{
}