/// <summary>
/// Locate the select clause that is part of this select statement.
/// Note, that this might return null as derived select clauses (i.e., no
/// select clause at the HQL-level) get generated much later than when we
/// get created; thus it depends upon lifecycle.
/// </summary>
/// <returns>Our select clause, or null.</returns>
public SelectClause GetSelectClause()
{
// Due to the complexity in initializing the SelectClause, do not generate one here.
// If it is not found; simply return null...
//
// Also, do not cache since it gets generated well after we are created.
return(( SelectClause )ASTUtil.FindTypeInChildren(this, HqlSqlWalker.SELECT_CLAUSE));
}
public OrderByClause GetOrderByClause()
{
if (_orderByClause == null)
{
_orderByClause = LocateOrderByClause();
// if there is no order by, make one
if (_orderByClause == null)
{
Log.Debug("getOrderByClause() : Creating a new ORDER BY clause");
_orderByClause = (OrderByClause)Walker.ASTFactory.CreateNode(HqlSqlWalker.ORDER, "ORDER");
// Find the WHERE; if there is no WHERE, find the FROM...
IASTNode prevSibling = ASTUtil.FindTypeInChildren(this, HqlSqlWalker.WHERE) ??
ASTUtil.FindTypeInChildren(this, HqlSqlWalker.FROM);
// Now, inject the newly built ORDER BY into the tree
prevSibling.AddSibling(_orderByClause);
}
}
return(_orderByClause);
}
private OrderByClause LocateOrderByClause()
{
return((OrderByClause)ASTUtil.FindTypeInChildren(this, HqlSqlWalker.ORDER));
}
