[英]MsSQL named JDBC template LIKE match
我正在尝试使用命名的JDBC模板与查询进行类似匹配...
SELECT
id, guid, body, summary, status_id, language_id, is_mce, content_type_id,
last_edited_by, locked_by, owner_id, coordinator_id, writer_id, paperless,
content_body_type, created, updated, locked_timestamp
FROM dbo.content
WHERE notes LIKE :notes
:notes
绑定到%test%
,不幸的是它没有返回任何结果。 我已经检查了数据库并验证了此数据是否存在。 这不是进行类似比赛的正确方法吗?
更新
生成此查询的部分代码...
String notes = search.getNotes();
if (notes instanceof String && notes.length() > 0) {
if (!previousClause) {
searchQuery.append("WHERE ");
previousClause = true;
}
searchQuery.append("notes LIKE :notes AND ");
queryMap.put("notes", "%"+notes+"%");
}
Collection<Category> categories = search.getCategoryCollection();
if (categories != null && categories.size() > 0) {
Short x = 0;
for (Category category : categories) {
searchQuery.append("INNER JOIN dbo.content_to_category AS content_to_category"+x.toString()+" ON (content_to_category"+x.toString()+".category_id IN (:categoryId"+x.toString()+") AND content_to_category"+x.toString()+".content_id = content.id) ");
queryMap.put("categoryId"+x.toString(), category.getId());
x++;
}
}
我假设:(1)您正在使用合理版本的Hibernate; (2)以上选择的字段是content
字段的子集。
应该是这样的:
Criteria crit = session.createCriteria(Content.class);
// add all selected fields:
ProjectionList projList = Projections.projectionList();
projList.add(Projections.property("id"));
projList.add(Projections.property("guid"));
projList.add(Projections.property("body"));
projList.add(Projections.property("summary"));
projList.add(Projections.property("status_id"));
projList.add(Projections.property("language_id"));
projList.add(Projections.property("is_mce"));
projList.add(Projections.property("content_type_id"));
projList.add(Projections.property("last_edited_by"));
projList.add(Projections.property("locked_by"));
projList.add(Projections.property("owner_id"));
projList.add(Projections.property("coordinator_id"));
projList.add(Projections.property("writer_id"));
projList.add(Projections.property("coordinator_id"));
projList.add(Projections.property("paperless"));
projList.add(Projections.property("content_body_type"));
projList.add(Projections.property("created"));
projList.add(Projections.property("updated"));
projList.add(Projections.property("locked_timestamp"));
crit.setProjection(projList);
// add a Restriction on notes field, using like:
crit.add(Restrictions.like("notes", "test", MatchMode.ANYWHERE));
// invoke query:
List list = crit.list();
更新
可以肯定的是,您应该使用的正确语法是(依靠直觉和那里的几个博客;我无法确定文档摘录):
Query query = // create long complicated query that ends with "WHERE notes LIKE :notes"
query.setParameter("notes", "%test%");
在您的情况下这可能不起作用的原因是, like
运算符适用于varchar
操作数,而此类...从这段代码中看来:
if (notes instanceof String && notes.length() > 0) {
您不确定该字段的基础类型...可能不是notes
不是String
吗?
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