public override void ExplicitVisit(DeleteStatement node)
{
if (node.DeleteSpecification != null && node.DeleteSpecification.OutputClause != null)
{
SelectElementVisitor vstor = new SelectElementVisitor(resolveColumnType, columnTypeResolver, node);
node.DeleteSpecification.OutputClause.Accept(vstor);
if (vstor.HasOutput)
{
resultHasOutputResultSet.Add(vstor.ResultOutput);
}
}
}
public override void ExplicitVisit(SelectStatement node)
{
if (node.Into != null)
{
return;
}
if (node.QueryExpression is BinaryQueryExpression bqe) // UNION?
{
// premature optimization : without visitor
SelectElementVisitor vstorF = new SelectElementVisitor(resolveColumnType, columnTypeResolver, node);
QuerySpecification qspecF = (QuerySpecification)bqe.FirstQueryExpression;
foreach (SelectElement selectEl in qspecF.SelectElements)
{
selectEl.Accept(vstorF);
}
if (vstorF.HasOutput)
{
if (vstorF.ResultOutput.HasMissingColumnInfo())
{
SelectElementVisitor vstorS = new SelectElementVisitor(resolveColumnType, columnTypeResolver, node);
QuerySpecification qspecS = (QuerySpecification)bqe.SecondQueryExpression;
foreach (SelectElement selectEl in qspecS.SelectElements)
{
selectEl.Accept(vstorS);
}
vstorF.ResultOutput.ApplyMissingInformation(vstorS.ResultOutput);
}
resultHasOutputResultSet.Add(vstorF.ResultOutput);
}
}
else
{
SelectElementVisitor vstor = new SelectElementVisitor(resolveColumnType, columnTypeResolver, node);
QuerySpecification qspec = (QuerySpecification)node.QueryExpression;
foreach (SelectElement selectEl in qspec.SelectElements)
{
selectEl.Accept(vstor);
}
if (vstor.HasOutput)
{
resultHasOutputResultSet.Add(vstor.ResultOutput);
}
}
}
