public void Remove(InputFragment fragment)
{
if (fragment == null)
{
return;
}
if (fragment.Name != null)
{
scopeTable.Remove(fragment.Name);
}
if (fragment is SelectStatement)
{
Remove((fragment as SelectStatement).From);
}
else if (fragment is JoinFragment)
{
JoinFragment j = fragment as JoinFragment;
Remove(j.Left);
Remove(j.Right);
}
else if (fragment is UnionFragment)
{
UnionFragment u = fragment as UnionFragment;
Remove(u.Left);
Remove(u.Right);
}
}
private SqlFragment HandleJoinExpression(DbExpressionBinding left, DbExpressionBinding right,
DbExpressionKind joinType, DbExpression joinCondition)
{
JoinFragment join = new JoinFragment();
join.JoinType = Metadata.GetOperator(joinType);
join.Left = VisitInputExpression(left.Expression, left.VariableName, left.VariableType);
join.Left = WrapJoinInputIfNecessary(join.Left, false);
join.Right = VisitInputExpression(right.Expression, right.VariableName, right.VariableType);
join.Right = WrapJoinInputIfNecessary(join.Right, true);
if (join.Right is SelectStatement)
{
SelectStatement select = join.Right as SelectStatement;
if (select.IsWrapped)
{
select.Name = right.VariableName;
}
}
// now handle the ON case
if (joinCondition != null)
{
join.Condition = joinCondition.Accept(this);
}
return(join);
}
private SqlFragment HandleJoinExpression(DbExpressionBinding left, DbExpressionBinding right,
DbExpressionKind joinType, DbExpression joinCondition)
{
JoinFragment join = new JoinFragment();
join.JoinType = Metadata.GetOperator(joinType);
join.Left = VisitInputExpression(left.Expression, left.VariableName, left.VariableType);
join.Left = WrapJoinInputIfNecessary(join.Left, false);
join.Right = VisitInputExpression(right.Expression, right.VariableName, right.VariableType);
join.Right = WrapJoinInputIfNecessary(join.Right, true);
if (join.Right is SelectStatement)
{
SelectStatement select = join.Right as SelectStatement;
if (select.IsWrapped)
select.Name = right.VariableName;
}
// now handle the ON case
if (joinCondition != null)
join.Condition = joinCondition.Accept(this);
return join;
}
