动态传入表名对表进行修改,我这里主要演示oracle空表无法导出的情况
作者:互联网
一、使用entityManager可以动态传入表名,首先需要查询出所有空表
@Query(value = "select 'alter table ' || a.table_name || ' allocate extent' from user_tables a where a.table_name not in (select segment_name from user_segments where segment_type = 'TABLE')", nativeQuery = true) List<String> findTables();
二、通过entityManager创建Query对象,并执行sql
List<String> list = versionDao.findTables(); if (!list.isEmpty() && list != null) { for (String str : list) {
//Str : alter table RECORD allocate extent,截取RECORD String reg = "alter table (.*?) allocate extent"; Pattern compile = Pattern.compile(reg); Matcher matcher = compile.matcher(str); while (matcher.find()) { String sql = "alter table " + matcher.group(1) + " allocate extent"; Query query = entityManager.createNativeQuery(sql); query.executeUpdate(); } } }
标签:对表,matcher,list,allocate,extent,表名,oracle,table,alter 来源: https://www.cnblogs.com/ZeroLife/p/11977847.html