internal override SqlRow VisitRow(SqlRow row)
{
foreach(SqlColumn c in row.Columns)
{
this.Visit(c.Expression);
}
return row;
}
internal override SqlRow VisitRow(SqlRow row)
{
foreach(SqlColumn col in row.Columns)
{
this.VisitColumn(col);
}
return row;
}
internal bool HasRowNumber(SqlRow row)
{
foreach(SqlColumn column in row.Columns)
{
if(this.HasRowNumber(column))
{
return true;
}
}
return false;
}
internal override SqlRow VisitRow(SqlRow row)
{
for(int i = 0, n = row.Columns.Count; i < n; i++)
{
row.Columns[i].Expression = this.VisitExpression(row.Columns[i].Expression);
if(this.hasRowNumber)
{
this.CurrentColumn = row.Columns[i];
break;
}
}
return row;
}
internal override SqlRow VisitRow(SqlRow row)
{
for(int i = 0, n = row.Columns.Count; i < n; i++)
{
SqlColumn col = row.Columns[i];
SqlExpression expr = this.VisitExpression(col.Expression);
if(expr != null)
{
if(TypeSystem.GetNonNullableType(col.ClrType) != TypeSystem.GetNonNullableType(expr.ClrType))
{
throw Error.ColumnClrTypeDoesNotAgreeWithExpressionsClrType();
}
}
}
return row;
}
internal override SqlRow VisitRow(SqlRow row)
{
foreach(SqlColumn c in row.Columns)
{
if(this.RefersToColumn(c, this.match))
{
if(this.found != null)
{
throw Error.ColumnIsDefinedInMultiplePlaces(GetColumnName(this.match));
}
this.found = c;
break;
}
}
return row;
}
internal SelectionFlattener(SqlRow row, Dictionary<SqlColumn, SqlColumn> map, bool isInput)
{
this.row = row;
this.map = map;
this.isInput = isInput;
}
internal virtual SqlRow VisitRow(SqlRow row) {
for (int i = 0, n = row.Columns.Count; i < n; i++) {
row.Columns[i].Expression = this.VisitExpression(row.Columns[i].Expression);
}
return row;
}
internal override SqlRow VisitRow(SqlRow row) {
foreach (SqlColumn c in row.Columns) {
c.Alias = alias;
}
return base.VisitRow(row);
}
internal override SqlRow VisitRow(SqlRow row)
{
for(int i = 0, n = row.Columns.Count; i < n; i++)
{
SqlColumn c = row.Columns[i];
if(i > 0)
_commandStringBuilder.Append(", ");
this.Visit(c.Expression);
string name = c.Name;
string inferredName = this.InferName(c.Expression, null);
if(name == null)
name = inferredName;
if(name == null)
{
if(!_names.TryGetValue(c, out name))
{
name = "C" + _names.Count;
_names[c] = name;
}
}
if(name != inferredName && !String.IsNullOrEmpty(name))
{
_commandStringBuilder.Append(" AS ");
this.WriteName(name);
}
}
return row;
}
internal override SqlRow VisitRow(SqlRow row)
{
SqlRow nrow = new SqlRow(row.SourceExpression);
foreach(SqlColumn c in row.Columns)
{
nrow.Columns.Add((SqlColumn)this.Visit(c));
}
return nrow;
}
private SqlExpression FlattenSelection(SqlRow row, bool isInput, SqlExpression selection)
{
selection = this.columnizer.ColumnizeSelection(selection);
return new SelectionFlattener(row, this.map, isInput).VisitExpression(selection);
}
private void ForceLocal(SqlRow row, string name)
{
bool isLocal = false;
// check to see if it already exists locally
foreach(SqlColumn c in row.Columns)
{
if(this.RefersToColumn(c, this.found))
{
this.found = c;
isLocal = true;
break;
}
}
if(!isLocal)
{
// need to put this in the local projection list to bubble it up
SqlColumn c = new SqlColumn(found.ClrType, found.SqlType, name, this.found.MetaMember, new SqlColumnRef(this.found), row.SourceExpression);
row.Columns.Add(c);
this.found = c;
}
}
