高级MySQL搜索查询--使用RLIKE

Question

我正在为Joomla/Virtuemart中的产品搜索模块进行MySQL搜索查询。实际上，我正在尝试修改现有的MySQL查询，从使用MATCH / from到使用RLIKE，但是修改后的查询会出现错误。

下面是匹配/对其没有错误的原始查询：

$searchstring = " +search* +string* +test*";
$query ="SELECT p.virtuemart_product_id, l.product_name from #__virtuemart_products AS p, #__virtuemart_products_".VMLANG." AS l WHERE MATCH(product_name,customtitle) AGAINST ('".$searchstring."' IN BOOLEAN MODE) AND p.published = '1' AND p.virtuemart_product_id = l.virtuemart_product_id  LIMIT 0,".$prods." union (select p.virtuemart_product_id, l.product_name from #__virtuemart_products AS p, #__virtuemart_products_".VMLANG." as l where  MATCH(product_sku) AGAINST ('".$searchstring."' IN BOOLEAN MODE) and p.published = '1'  and p.virtuemart_product_id = l.virtuemart_product_id LIMIT 0,".$prods.")";

下面是我使用RLIKE修改的查询：

$searchstring = "search|string|test";
$query ="SELECT p.virtuemart_product_id, l.product_name from #__virtuemart_products AS p, #__virtuemart_products_".VMLANG." AS l WHERE product_name,customtitle RLIKE '".$searchstring."' AND p.published = '1' AND p.virtuemart_product_id = l.virtuemart_product_id LIMIT 0,".$prods." union (select p.virtuemart_product_id, l.product_name from #__virtuemart_products AS p, #__virtuemart_products_".VMLANG." as l where product_sku RLIKE '".$searchstring."' and p.published = '1'  and p.virtuemart_product_id = l.virtuemart_product_id LIMIT 0,".$prods.")";

我不知道为什么RLIKE搜索查询不起作用。我希望有人能指出我在这里做错了什么

Answer 1

查询中有一个奇怪的表达式：

WHERE product_name, customtitle RLIKE '".$searchstring."'

尝试首先使用concat()组合它们：

(SELECT p.virtuemart_product_id, l.product_name
 from #__virtuemart_products p join
      #__virtuemart_products_".VMLANG." l
      on p.virtuemart_product_id = l.virtuemart_product_id
 WHERE concat(product_name, customtitle) RLIKE '".$searchstring."' AND
       p.published = '1'
 LIMIT 0,".$prods."
)
union
(select p.virtuemart_product_id, l.product_name
 from #__virtuemart_products p join
      #__virtuemart_products_".VMLANG." l
      on p.virtuemart_product_id = l.virtuemart_product_id
 where product_sku RLIKE '".$searchstring."' and
       p.published = '1'
 LIMIT 0,".$prods.
)

您还可以分别比较每一个：

 WHERE (product_name RLIKE '".$searchstring."' OR
        customtitle RLIKE '".$searchstring."' 
       ) AND . . .

注意，我还修正了使用显式联接的join语法。