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rebased with Marr.Data

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there is a broken test.
This commit is contained in:
Keivan Beigi 2013-05-27 16:35:53 -07:00
commit 261ce772de
8 changed files with 199 additions and 58 deletions
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56
Marr.Data/QGen/SqlitePagingQueryDecorator.cs
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@ -30,6 +30,19 @@ namespace Marr.Data.QGen
public string Generate()
{
if (_innerQuery.IsView || _innerQuery.IsJoin)
{
return ComplexPaging();
}
else
{
return SimplePaging();
}
}
private string SimplePaging()
{
// Create paged query
StringBuilder sql = new StringBuilder();
_innerQuery.BuildSelectClause(sql);
@ -42,6 +55,28 @@ namespace Marr.Data.QGen
return sql.ToString();
}
private string ComplexPaging()
{
var baseTable = _innerQuery.Tables.First();
StringBuilder sql = new StringBuilder();
_innerQuery.BuildSelectClause(sql);
sql.Append(" FROM (");
BuildSimpleInnerSelect(sql);
_innerQuery.BuildFromClause(sql);
_innerQuery.BuildWhereClause(sql);
sql.AppendLine(String.Format("LIMIT {0},{1}", _skip, _take));
sql.AppendFormat(") AS {0} ", _innerQuery.Dialect.CreateToken(baseTable.Alias));
_innerQuery.BuildJoinClauses(sql);
_innerQuery.BuildOrderClause(sql);
return sql.ToString();
}
public void BuildSelectClause(StringBuilder sql)
{
List<string> appended = new List<string>();
@ -86,5 +121,26 @@ namespace Marr.Data.QGen
}
}
}
private void BuildSimpleInnerSelect(StringBuilder sql)
{
sql.Append("SELECT ");
int startIndex = sql.Length;
// COLUMNS
var join = _innerQuery.Tables.First();
for (int i = 0; i < join.Columns.Count; i++)
{
var c = join.Columns[i];
if (sql.Length > startIndex)
sql.Append(",");
string token = c.ColumnInfo.Name;
sql.Append(_innerQuery.Dialect.CreateToken(token));
}
}
}
}