|
public GetFragment ( string name ) : |
||
| name | string | |
| return | ||
public override SqlFragment Visit(DbPropertyExpression expression)
{
propertyLevel++;
PropertyFragment fragment = expression.Instance.Accept(this) as PropertyFragment;
fragment.Properties.Add(expression.Property.Name);
propertyLevel--;
// if we are not at the top level property then just return
if (propertyLevel > 0)
{
return(fragment);
}
// we are at the top level property so now we can do our work
ColumnFragment column = GetColumnFromPropertyTree(fragment);
for (int i = fragment.Properties.Count - 1; i >= 0; --i)
{
InputFragment inputFragment = scope.GetFragment(fragment.Properties[i]);
if (inputFragment != null)
{
column.TableAlias = inputFragment.Name;
break;
}
}
return(column);
}
void AddDefaultColumns(Scope scope)
{
if (columnHash == null)
{
columnHash = new Dictionary <string, ColumnFragment>();
}
List <ColumnFragment> columns = GetDefaultColumnsForFragment(From);
bool Exists = false;
if (From is TableFragment && scope.GetFragment((From as TableFragment).Table) == null)
{
scope.Add((From as TableFragment).Table, From);
Exists = true;
}
foreach (ColumnFragment column in columns)
{
// first we need to set the input for this column
InputFragment input = scope.FindInputFromProperties(column.PropertyFragment);
column.TableName = input.Name;
// then we rename the column if necessary
if (columnHash.ContainsKey(column.ColumnName.ToUpper()))
{
column.ColumnAlias = MakeColumnNameUnique(column.ColumnName);
columnHash.Add(column.ColumnAlias, column);
}
else
{
columnHash.Add(column.ColumnName.ToUpper(), column);
}
Columns.Add(column);
}
if (From is TableFragment && Exists)
{
scope.Remove((From as TableFragment).Table, From);
}
}
void AddDefaultColumns(Scope scope)
{
if (columnHash == null)
columnHash = new Dictionary<string, ColumnFragment>();
List<ColumnFragment> columns = GetDefaultColumnsForFragment(From);
bool Exists = false;
if (From is TableFragment && scope.GetFragment((From as TableFragment).Table) == null)
{
scope.Add((From as TableFragment).Table, From);
Exists = true;
}
foreach (ColumnFragment column in columns)
{
// first we need to set the input for this column
InputFragment input = scope.FindInputFromProperties(column.PropertyFragment);
column.TableName = input.Name;
// then we rename the column if necessary
if (columnHash.ContainsKey(column.ColumnName.ToUpper()))
{
column.ColumnAlias = MakeColumnNameUnique(column.ColumnName);
columnHash.Add(column.ColumnAlias, column);
}
else
columnHash.Add(column.ColumnName.ToUpper(), column);
Columns.Add(column);
}
if (From is TableFragment && Exists)
{
scope.Remove(From);
}
}
public override SqlFragment Visit(DbPropertyExpression expression)
{
propertyLevel++;
PropertyFragment fragment = expression.Instance.Accept(this) as PropertyFragment;
fragment.Properties.Add(expression.Property.Name);
propertyLevel--;
// if we are not at the top level property then just return
if (propertyLevel > 0)
{
return(fragment);
}
ColumnFragment column = new ColumnFragment(null, fragment.LastProperty);
column.PropertyFragment = fragment;
InputFragment input = scope.FindInputFromProperties(fragment);
if (input != null)
{
column.TableName = input.Name;
}
// now we need to check if our column name was possibly renamed
if (input is TableFragment)
{
if (!string.IsNullOrEmpty(input.Name))
{
SelectStatement sf = scope.GetFragment(input.Name) as SelectStatement;
if (sf != null)
{
// Special case: undo alias in case of query fusing
for (int i = 0; i < sf.Columns.Count; i++)
{
ColumnFragment cf = sf.Columns[i];
if (column.ColumnName == cf.ColumnAlias)
{
column.ColumnName = cf.ColumnName;
column.ColumnAlias = cf.ColumnAlias;
column.TableName = input.Name;
return(column);
}
}
}
}
return(column);
}
SelectStatement select = input as SelectStatement;
UnionFragment union = input as UnionFragment;
if (select != null)
{
select.HasDifferentNameForColumn(column);
}
else if (union != null)
{
union.HasDifferentNameForColumn(column);
}
// input is a table, selectstatement, or unionstatement
return(column);
}