/// <summary>
/// 创建数据集函数表达式。
/// </summary>
/// <param name="func">函数的CLR对象。</param>
/// <param name="kind">函数种类。</param>
/// <param name="argus">函数参数。</param>
public DbSetFunctionExpression(MethodInfo func, EMapFunctionKind kind, params DbExpression[] argus)
: base(func, kind, argus)
{
ReturnClrType = func.ReturnType.GetGenericArguments()[0];
}
/// <summary>
/// 创建标量函数调用表达式。
/// </summary>
/// <param name="func">CLR函数对象。</param>
/// <param name="kind">函数种类。</param>
/// <param name="argus">函数参数。</param>
public DbScalarFunctionExpression(MemberInfo func, EMapFunctionKind kind, params DbExpression[] argus)
: base(func, kind, argus)
{
}
/// <summary>
/// 创建数据项函数表达式。
/// </summary>
/// <param name="func">函数CLR描述对象。</param>
/// <param name="kind">函数映射种类。</param>
/// <param name="argus">函数参数。</param>
public DbItemFunctionExpression(MethodInfo func, EMapFunctionKind kind, params DbExpression[] argus)
: base(func, kind, argus)
{
}
/// <summary>
/// 创建函数映射表达式。
/// </summary>
/// <param name="func">函数CLR描述对象。</param>
/// <param name="kind">映射种类。</param>
/// <param name="argus">函数参数。</param>
public DbMapFunctionExpression(MemberInfo func, EMapFunctionKind kind, DbExpression[] argus)
: base(func, argus)
{
Kind = kind;
}