protected void AddInlinableColumn(IInlinableProvider provider, Column column,
SqlSelect resultQuery, SqlExpression columnExpression)
{
var columnName = ProcessAliasedName(column.Name);
var columnRef = SqlDml.ColumnRef(SqlDml.Column(columnExpression), columnName);
if (provider.IsInlined && !rootColumns.Contains(column.Origin))
{
var columnStub = SqlDml.ColumnStub(columnRef);
stubColumnMap.Add(columnStub, columnExpression);
resultQuery.Columns.Add(columnStub);
}
else
{
resultQuery.Columns.Add(columnRef);
}
}
private SqlSelect ProcessApplyViaSubqueries(ApplyProvider provider, SqlProvider left, SqlProvider right, bool shouldUseQueryReference)
{
var rightQuery = right.Request.Statement;
SqlSelect query;
if (shouldUseQueryReference)
{
var leftTable = left.PermanentReference;
query = SqlDml.Select(leftTable);
query.Columns.AddRange(leftTable.Columns.Cast <SqlColumn>());
}
else
{
query = left.Request.Statement.ShallowClone();
}
var isApplyExistence =
provider.Right.Type == ProviderType.Existence ||
provider.Right.Type == ProviderType.Select && provider.Right.Sources[0].Type == ProviderType.Existence;
if (isApplyExistence)
{
for (int i = 0; i < rightQuery.Columns.Count; i++)
{
var column = rightQuery.Columns[i];
if (provider.IsInlined)
{
var columnStub = SqlDml.ColumnStub(column);
var userColumn = ExtractUserColumn(column);
stubColumnMap.Add(columnStub, userColumn.Expression);
column = columnStub;
}
query.Columns.Add(column);
}
}
else
{
if (provider.IsInlined)
{
for (int i = 0; i < rightQuery.Columns.Count; i++)
{
var subquery = rightQuery.ShallowClone();
var sqlColumn = subquery.Columns[i];
if (IsColumnStub(sqlColumn))
{
var columnStub = ExtractColumnStub(sqlColumn);
subquery.Columns.Clear();
subquery.Columns.Add(columnStub.Column);
query.Columns.Add(subquery, sqlColumn.Name);
}
else
{
var columnRef = (SqlColumnRef)sqlColumn;
var column = columnRef.SqlColumn;
subquery.Columns.Clear();
subquery.Columns.Add(column);
var columnName = ProcessAliasedName(provider.Right.Header.Columns[i].Name);
var userColumnRef = SqlDml.ColumnRef(SqlDml.Column(subquery), columnName);
var columnStub = SqlDml.ColumnStub(userColumnRef);
stubColumnMap.Add(columnStub, subquery);
query.Columns.Add(columnStub);
}
}
}
else
{
for (int i = 0; i < rightQuery.Columns.Count; i++)
{
var subquery = rightQuery.ShallowClone();
var column = subquery.Columns[i];
if (IsColumnStub(column))
{
var columnStub = ExtractColumnStub(column);
subquery.Columns.Clear();
subquery.Columns.Add(columnStub.Column);
query.Columns.Add(subquery, column.Name);
}
else
{
var columnRef = (SqlColumnRef)column;
var sqlColumn = columnRef.SqlColumn;
subquery.Columns.Clear();
subquery.Columns.Add(sqlColumn);
query.Columns.Add(subquery, columnRef.Name);
}
}
}
}
return(query);
}
