protected SqlString GenerateIdInsertSelect(IQueryable persister, string tableAlias, IASTNode whereClause)
{
var select = new SqlSelectBuilder(Factory);
SelectFragment selectFragment = new SelectFragment(Factory.Dialect)
.AddColumns(tableAlias, persister.IdentifierColumnNames, persister.IdentifierColumnNames);
select.SetSelectClause(selectFragment.ToFragmentString().Substring(2));
string rootTableName = persister.TableName;
SqlString fromJoinFragment = persister.FromJoinFragment(tableAlias, true, false);
SqlString whereJoinFragment = persister.WhereJoinFragment(tableAlias, true, false);
select.SetFromClause(rootTableName + ' ' + tableAlias + fromJoinFragment);
if (whereJoinFragment == null)
{
whereJoinFragment = SqlString.Empty;
}
else
{
whereJoinFragment = whereJoinFragment.Trim();
if (whereJoinFragment.StartsWithCaseInsensitive("and "))
{
whereJoinFragment = whereJoinFragment.Substring(4);
}
}
SqlString userWhereClause = SqlString.Empty;
if (whereClause.ChildCount != 0)
{
// If a where clause was specified in the update/delete query, use it to limit the
// returned ids here...
try
{
var nodes = new CommonTreeNodeStream(whereClause);
var gen = new SqlGenerator(Factory, nodes);
gen.WhereClause();
userWhereClause = gen.GetSQL().Substring(7);
}
catch (RecognitionException e)
{
throw new HibernateException("Unable to generate id select for DML operation", e);
}
if (whereJoinFragment.Length > 0)
{
whereJoinFragment.Append(" and ");
}
}
select.SetWhereClause(whereJoinFragment + userWhereClause);
var insert = new InsertSelect();
if (Factory.Settings.IsCommentsEnabled)
{
insert.SetComment("insert-select for " + persister.EntityName + " ids");
}
insert.SetTableName(persister.TemporaryIdTableName);
insert.SetSelect(select);
return insert.ToSqlString();
}