数据库管理系统存储的一般都是结构化数据，长足于数值的计算、查询、统计与挖掘。随着计算机存储与计算能力的迅猛发展，越来越多的非结构化文本数据存储在数据库中，数据库中的文本搜索日益广泛。



当前，数据库中的文本搜索，一般采用SQL语句中的Like操作符或者采用数据库系统自带的全文索引功能。Like操作往往特别耗时，数据规模超过10万条，查询往往会导致网络连接超时，无法满足在线搜索的需要；同时，Like查询仅仅是简单的字符串匹配，没有考虑语言语义，检索“和服”，同样会命中“产品和服务”。当前，数据库内置的全文索引功能，速度和效果同样存在类似缺陷。因此，在数据库系统基础上，需要对非结构化文本字段构建智能的搜索引擎。



DBTSearch全文搜索引擎是一套专门针对数据库的全文智能搜索引擎系统，可以无缝地与现有数据库系统融合，实现全文搜索与相关的数据库管理应用系统。-Database management systems are generally stored in structured data, leaps and bounds in the numerical calculation, query, statistics and mining. With the computer storage and the rapid development of computing power, more and more unstructured text data is stored in the database, the database text search increasingly widespread.



　　　At present, the database text search, generally SQL statement using Like operator or to use database system comes with full-text indexing. Like the special operations are often time-consuming, the data size of more than 100,000, the query will often result in the network connection timed out, unable to meet the needs of online search　the same time, Like query is just a simple string matching, without considering language semantics, retrieval, "Kimono ", it will also hit the" products and services. " At present, the database built-in full-text indexing functionality, speed and effectiveness also exists a similar defect. Therefore, database systems, b