/// <summary>
/// 获取列名列表
/// </summary>
/// <param name="dialect">Sql方言</param>
/// <param name="register">实体别名注册器</param>
public string ToSql(IDialect dialect, IEntityAliasRegister register)
{
if (Raw || IsAggregation)
{
return(dialect.GetColumn(Name, dialect.GetSafeName(ColumnAlias)));
}
var result = new SqlItem(Name, GetTableAlias(register), ColumnAlias, isResolve: false);
return(result.ToSql(dialect));
}
/// <summary>
/// 初始化一个<see cref="OnItem"/>类型的实例
/// </summary>
/// <param name="left">左表列名</param>
/// <param name="right">右表列名</param>
/// <param name="operator">条件运算符</param>
public OnItem(SqlItem left, SqlItem right, Operator @operator)
{
Left = left;
Right = right;
Operator = @operator;
}
/// <summary>
/// 初始化一个<see cref="JoinItem"/>类型的实例
/// </summary>
/// <param name="joinType">连接类型</param>
/// <param name="table">表</param>
/// <param name="conditions">连接条件列表</param>
public JoinItem(string joinType, SqlItem table, List <List <OnItem> > conditions)
{
JoinType = joinType;
Table = table;
Conditions = conditions;
}
/// <summary>
/// 初始化一个<see cref="OnItem"/>类型的实例
/// </summary>
/// <param name="left">左表列名</param>
/// <param name="right">右表列名</param>
/// <param name="operator">条件运算符</param>
public OnItem(string left, string right, Operator @operator)
{
Left = new SqlItem(left);
Right = new SqlItem(right);
Operator = @operator;
}