public static string ToSql(this JoinOpt opt)
{
string rst = string.Empty;
switch (opt)
{
case JoinOpt.Inner:
rst = "INNER JOIN";
break;
case JoinOpt.Left:
rst = "LEFT OUTER JOIN";
break;
case JoinOpt.Right:
rst = "RIGHT OUTER JOIN";
break;
case JoinOpt.None:
break;
default:
throw new ArgumentException("未知的表连接运算符");
}
return(rst);
}
public JoinNode(Table rightTable, WhereNode jw, JoinOpt joption)
{
this.rightTable = rightTable;
this.jw = jw;
this.joption = joption;
}
