public override string PagedQuery(IQuery query, uint numberPerPage, uint page)
{
query.ThrowIfNullArgument(nameof(query));
if (page == 0 || numberPerPage == 0)
{
GenerateExceptionHelper.ThrowMustGreaterThanZero();
}
if (query.Order == null)
{
GenerateExceptionHelper.ThrowPagedQueryMustSpecifyOrder();
}
try
{
IReadOnlyList <SingleEntityView> svList = _vv.VisitAlias(query.View);
StringBuilder sql = new StringBuilder();
if (page == 1)
{
sql.Append(_tr.Select).AppendFormat(TOP_N, numberPerPage);
sql.Append(_cb.BuildSelectColumns(query.View));
sql.Append(_tr.From).Append(_vv.BuildJoinClause(query.View));
if (query.Criteria != null)
{
sql.Append(_tr.Where);
sql.Append(_cv.BuildWhereFilters(query.Criteria, svList));
}
sql.Append(_tr.OrderBy).Append(_ov.BuildOrderClause(query.Order, svList));
return(sql.ToString());
}
else
{
StringBuilder sub = new StringBuilder();
sub.Append(_tr.Select).AppendFormat(TOP_N, (page - 1) * numberPerPage).Append(_ov.BuildOrderSelectColumns(query.Order, svList));
sub.Append(_tr.From).Append(_vv.BuildJoinClause(query.View));
if (query.Criteria != null)
{
sub.Append(_tr.Where).Append(_cv.BuildWhereFilters(query.Criteria, svList));
}
sub.Append(_tr.OrderBy).Append(_ov.BuildOrderClause(query.Order, svList));
sql.Append(_tr.Select).AppendFormat(TOP_N, numberPerPage).Append(_cb.BuildSelectColumns(query.View));
sql.Append(_tr.From).Append(_vv.BuildJoinClause(query.View));
sql.Append(_tr.Where).Append(_ov.BuildOrderSelectColumns(query.Order, svList)).Append(_tr.NotIn).Append(sub.Bracketing(StringPair.Parenthesis));
if (query.Criteria != null)
{
sql.Append(_tr.And).Append(_cv.BuildWhereFilters(query.Criteria, svList));
}
sql.Append(_tr.OrderBy).Append(_ov.BuildOrderClause(query.Order, svList));
return(sql.ToString());
}
}
catch (Exception ex)
{
throw ex.CreateWrapException <SQLGenerateException>();
}
}
public override string PagedQuery(IQuery query, uint numberPerPage, uint page)
{
query.ThrowIfNullArgument(nameof(query));
if (page == 0 || numberPerPage == 0)
{
GenerateExceptionHelper.ThrowMustGreaterThanZero();
}
if (query.Order == null)
{
GenerateExceptionHelper.ThrowPagedQueryMustSpecifyOrder();
}
try
{
string pagedQuery = "SELECT * FROM (SELECT row_.*, rownum rownum_ FROM ({0}) row_ WHERE rownum <= {1}) WHERE rownum_ > {2}";
var n1 = numberPerPage * page;
var n2 = numberPerPage * (page - 1);
var svList = _vv.VisitAlias(query.View);
StringBuilder str = new StringBuilder();
str.Append(_tr.Select).Append(_cb.BuildSelectColumns(query.View));
str.Append(_tr.From).Append(_vv.BuildJoinClause(query.View));
if (query.Criteria != null)
{
str.Append(_tr.Where).Append(_cv.BuildWhereFilters(query.Criteria, svList));
}
str.Append(_tr.OrderBy).Append(_ov.BuildOrderClause(query.Order, svList));
return(string.Format(pagedQuery, str, n1, n2));
}
catch (Exception ex)
{
throw ex.CreateWrapException <SQLGenerateException>();
}
}
