然后再次执行数据泵的导入,不过这次采用DATA_OPTIONS=DISABLE_APPEND_HINT参数进行导入: [oracle@bjtest ~]$ impdp test/test dumpfile=t_append.dp directory=d_output tables=t_append content=data_only data_options=disable_append_hint Import: Release11.2.0.1.0 - Production on星期三9月9 20:39:36 2009...
DISABLE_APPEND_HINT:指定在数据对象导入的时候不使用APPEND hint的功能。如果数据库中已经存在一部分需要导入的数据对象,为了提高应用对这部分数据的并发访问能力,禁用APPEND hint可以收到不错的效果,如果没有指定DISABLE_APPEND_HINT,则默认会使用APPEND hint来导入数据; SKIP_CONSTRAINT_ERRORS:指定在数据对象导入的时候...
impdp导入操作 #!/bin/bash chunk=10 for ((i=0;i<chunk;i++)); do impdp USERNAME/Password@DB_NAME directory=DMP REMAP_TABLE=LOB_TEST:LOB_TEST remap_schema=source:target >dumpfile= lob_test_${i}.dmp logfile=TABLE_imp_log_test_${i}.log DATA_OPTIONS=DISABLE_APPEND_HINT CONTENT=DATA_O...
selectfile#,block#fromv$bhwhereobjd=(selectdata_object_idfromuser_objectswhereobject_name='STUDENT'); 由于对AA表进行了全表扫描,因此,AA表中高水点下的所有块都被读进了Buffer cache。 ③ 使用直接路径插入,并提交 insert/*+ append*/intostudent_tempselect*fromstudent; commit; 查看student_temp表中数据...
在SQL语句优化过程中,我们经常会用到hint,现总结一下在SQL优化过程中常见Oracle HINT的用法: 1. /*+ALL_ROWS*/ 表明对语句块选择基于开销的优化方法,并获得最佳吞吐量,使资源消耗最小化. 例如: SELECT /*+ALL+_ROWS*/ EMP_NO,EMP_NAM,DAT_IN FROM BSEMPMS WHERE EMP_NO='SCOTT'; ...
Of the three options the foreign key constraint seemed to me to be the best strategy to disable the hint with minimal side effects, so my answer was: “Create a new table with no data and a primary key constraint; add an invisible column to the target table, index it (online) and add...
默认情况下,Scheduler在维护窗口(maintenance window,目前227上默认启动时间为每晚上10:00至次日早上6:00及整个周六周日)打开时运行GATHER_STATS_JOB作业,作业GATHER_STATS_JOB则是通过调用系统内部过程DBMS_STATS.GATHER_DATABASE_STATS_JOB_PROC来完成信息统计的,该过程可根据数据库对象统计信息需求的优先级(即数据库对...
/*+ append */的hint,于是下面做了段模拟这个错误实验 session 1 SQL>create table tb_test asselect* from emp where1=2;Table created. SQL>insert /*+ append */ into tb_testselect* from emp;14rows created. -- 注意/*+ append*/ 没有commit ...
dataType calcValue aggregates dependsOn The existing defaultValue property can also now be a function. New property added to model RecordFieldMetadata: stale New Options for TableModelView and Grid widgets: hideEmptyFooter noDataIcon pagination.hideSinglePage See Also:Oracle Application Express ...
DBMS_STATS.GATHER_DICTIONARY_STATS END; Generate a migration template The two options --project_base and --init_project when used indicate to ora2pg that he has to create a project template with a work tree, a configuration file and a script to export all objects from the Oracle database...