Question

我想在全文搜索（CROSS APPLY或FREETEXT）中使用CONTAINS的结果，如下所示：

   SELECT  p.Id ,
            p.Name ,
            p.ShortDescription ,
            p.DisplayOrder ,
            cat.Name AS CategoryName
    FROM    dbo.Product AS p
            CROSS APPLY ( SELECT TOP 1
                                    c.Name ,
                                    c.Description ,
                                    c.Id
                          FROM      dbo.Product_Category_Mapping AS m
                                    LEFT JOIN dbo.Category AS c ON m.CategoryId = c.Id
                          WHERE     m.ProductId = p.Id
                                    AND c.Published = 1
                                    AND c.Deleted = 0
                        ) AS cat
    WHERE   p.Published = 1
            AND p.Deleted = 0
            AND ( CONTAINS ( p.NAME, @search )
                  OR CONTAINS ( p.FullDescription, @search )
                  OR CONTAINS ( cat.NAME, @search )
                );

我的问题是==＆gt; OR CONTAINS ( cat.Name, @search )。 SQL Server返回的错误是：

无法在“名称”列上使用CONTAINS或FREETEXT谓词，因为它不是全文索引。

似乎CROSS APPLY的结果是一个表，并且该表不是全文索引的。如何将全文索引搜索条件应用于上面CROSS APPLY的结果？

Answer 1

尝试这样的事情：

SELECT  p.Id ,
            p.Name ,
            p.ShortDescription ,
            p.DisplayOrder ,
            cat.Name AS CategoryName
    FROM    dbo.Product AS p
            CROSS APPLY ( SELECT TOP 1
                                    c.Name ,
                                    c.Description ,
                                    c.Id
                          FROM      dbo.Product_Category_Mapping AS m
                                    LEFT JOIN dbo.Category AS c ON m.CategoryId = c.Id
                          WHERE     m.ProductId = p.Id
                                    AND c.Published = 1
                                    AND c.Deleted = 0
                        ) AS cat
    LEFT JOIN dbo.Category cat2 ON cat2.Id = cat.Id
    WHERE   p.Published = 1
            AND p.Deleted = 0
            AND ( CONTAINS ( p.NAME, @search )
                  OR CONTAINS ( p.FullDescription, @search )
                  OR CONTAINS ( cat2.NAME, @search )
                );

注意，我已在主要级别重新加入dbo.Category，并将CONTAINS谓词更改为引用cat2.NAME而非cat.Name。 cat是CROSS JOIN别名，它确实不在全文索引之下，但在cat2下别名的主dbo.Category表在全文索引下，因此您可以使用其列{{ 1}}与NAME。

此外，我认为如果您重新编写查询并在CONTAINS内移动CONTAINS支票会更好：

CROSS JOIN

HTH

如何在全文搜索中使用CROSS APPLY的结果

1 个答案: