使用CLR返回表

Question

我想编写一个CLR过程,它接受一个文本并返回一个包含本文中所有单词的表.但我无法弄清楚如何返回一张桌子.你能告诉我吗？

    [Microsoft.SqlServer.Server.SqlFunction]
    public static WhatTypeShouldIWriteHere Function1(SqlString str)
    {
        string[] words = Regex.Split(str, @"\W+").Distinct().ToArray();
        //how to return a table with one column of words?
    }

谢谢您的帮助.

更新:我需要为sql-2005做这件事

Answer 1

这是一个完整的样本.我厌倦了自己寻找这个,即使这个问题得到了解答,我想我会发布这个只是为了在网上保留一个新的参考.

using System;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using System.Text.RegularExpressions;
using System.Collections;
using System.Collections.Generic;

public partial class UserDefinedFunctions {    
  [SqlFunction]
  public static SqlBoolean RegexPatternMatch(string Input, string Pattern) {    
    return Regex.Match(Input, Pattern).Success ? new SqlBoolean(true) : new SqlBoolean(false);
  }

  [SqlFunction]
  public static SqlString RegexGroupValue(string Input, string Pattern, int GroupNumber) {

    Match m = Regex.Match(Input, Pattern);
    SqlString value = m.Success ? m.Groups[GroupNumber].Value : null;

    return value;
  }

  [SqlFunction(DataAccess = DataAccessKind.Read, FillRowMethodName = "FillMatches", TableDefinition = "GroupNumber int, MatchText nvarchar(4000)")]
  public static IEnumerable RegexGroupValues(string Input, string Pattern) {
    List<RegexMatch> GroupCollection = new List<RegexMatch>();

    Match m = Regex.Match(Input, Pattern);
    if (m.Success) {
      for (int i = 0; i < m.Groups.Count; i++) {
        GroupCollection.Add(new RegexMatch(i, m.Groups[i].Value));
      }
    }

    return GroupCollection;
  }

  public static void FillMatches(object Group, out SqlInt32 GroupNumber, out SqlString MatchText) {
    RegexMatch rm = (RegexMatch)Group;
    GroupNumber = rm.GroupNumber;
    MatchText = rm.MatchText;
  }

  private class RegexMatch {
    public SqlInt32 GroupNumber { get; set; }
    public SqlString MatchText { get; set; }

    public RegexMatch(SqlInt32 group, SqlString match) {
      this.GroupNumber = group;
      this.MatchText = match;
    }
  }
};

Answer 2

您可以返回任何实现 IEnumerable 的列表。看一下这个。