Mybatis 针对oracle的批量插入 xml文件参数对象: 1publicclassColumns{2privateString basedate_code;3privateString tableName;4privateString codeDescribeindex;5privateString codeInfoindex;6privateString codePymindex;7privateList<Info> infos; Dao层方法: publicvoidbulkInsert(Columns columns); xml文件配置: 1<...
从上述[资料] http://blog.harawata.net/2016/04/bulk-insert-multi-row-vs-batch-using.html 可知,耗时就耗在,由于我 foreach 后有 5000+ 个 values,所以这个PreparedStatement 特别长,包含了很多占位符,对于占位符和参数的映射尤其耗时。并且,查阅相关[资料]https://www.red-gate.com/simple-talk/sql/perfor...
Insert inside MyBatis foreach is not batch, this is a single (could become giant) SQL statement and that brings drawbacks: some database such as Oracle here does not support. in relevant cases: there will be a large number of records to insert and the database configured limit (by defaul...
所以,如果非要使用 foreach 的方式来进行批量插入的话,可以考虑减少一条 insert 语句中 values 的个数,最好能达到上面曲线的最底部的值,使速度最快。一般按经验来说,一次性插20~50行数量是比较合适的,时间消耗也能接受。 重点来了。上面讲的是,如果非要用<foreach>的方式来插入,可以提升性能的方式。而实际上...
some database such as Oracle here does not support. in relevant cases: there will be a large number of records to insert and the database configured limit (by default around 2000 parameters per statement) will be hit, and eventually possibly DB stack error if the statement itself become too...
some database such as Oracle here does not support. in relevant cases: there will be a large number of records to insert and the database configured limit (by default around 2000 parameters per statement) will be hit, and eventually possibly DB stack error if the statement itself become too...
使用insert from select插入的MS SQL输出 如何使用额外的列执行"Insert into select *“查询? SQLite使用SELECT中的insert手动设置列 未使用select查询的cx_oracle insert 如何使用MyBatis BlobInputStreamTypeHandler / ClobReaderTypeHandler流式传输select请求的内容? 如何在INSERT语句和CONCAT()函数中使用多个SELECT语句 ...
Insert inside Mybatis foreach is not batch, this is a single (could become giant) SQL statement and that brings drawbacks: some database such as Oracle here does not support. in relevant cases: there will be a large number of records to insert and the database configured limit (by defaul...
> ### 摘要 > 本文聚焦于MyBatis SQL编写技巧,分享高效的动态SQL编写方法。通过介绍`forEach`循环、模糊查询、`choose`多条件判断、`selectKey`主键生成及`if`动态条件等关键技术点,旨在提高代码的可读性和维护性,减少编程错误,并适用于多种开发场景。这些技巧不仅简化了复杂查询的构建,还增强了SQL语句的灵活性和...
FETCH cur BULK COLLECT INTO recs LIMIT 100; FORALL i IN 1 .. recs.COUNT INSERT INTO t VALUES recs (i); COMMIT; EXIT WHEN cur%NOTFOUND; END LOOP; CLOSE cur; END; / ###setting 2: --用 rownum 来限定取出的记录数来测试 cursor