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...
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...
您可通过选择一个新参数 data_options 来执行此操作,该参数可更改默认行为。以下是一个示例: $ impdp dumpfile=sales.dmp tables=sales directory=input_dir data_options=disable_append_hint disable_append_hint 值强制 Data Pump 作业通过正常插入(而不是直接路径插入)来加载。现在,DML 可在正在加载的表中运行...
DATA_OPTIONS = [DISABLE_APPEND_HINT | SKIP_CONSTRAINT_ERRORS | REJECT_ROWS_WITH_REPL_CHAR | GROUP_PARTITION_TABLE_DATA | TRUST_EXISTING_TABLE_PARTITIONS | VALIDATE_TABLE_DATA | ENABLE_NETWORK_COMPRESSION | CONTINUE_LOAD_ON_FORMAT_ERROR] DISABLE_APPEND_HINT: Specifies that you do not want the...
5.2 dba_stmt_audit_opts:可以用来查看statement审计级别的audit options,即数据库设置过哪些statement级别的审计。dba_obj_audit_opts,dba_priv_audit_opts视图功能与之类似 5.3 all_def_audit_opts:用来查看数据库用on default子句设置了哪些默认对象审计。
② 语句级别,SQL语句中有Hint提示,例如,使用PARALLEL或者PARALLEL_INDEX。如,“SELECT /*+ PARALLEL(T 4) */ FROM T;”。 ③ SQL语句中引用的对象被设置了并行属性。在表和索引的定义中增加并行度属性,该属性可以在创建表和索引时设置,也可对已创建的表和索引的并行度属性进行修改。例如,“ALTER TABLE TB_NA...
At around 5,000 bytes of data per row change, the benefits of using BATCHSQL diminish. Managing Memory The gathering of SQL statements into batches improves efficiency but also consumes memory. To maintain optimum performance, use the following BATCHSQL options: BATCHESPERQUEUE BYTESPERQUEUE OPS...
The difference between the Oracle APPEND and APPEND_VALUES optimizer hints and when to use each. How the APPEND_VALUES hint can improve performance in INSERT statements with individual rows. Practical examples of using the APPEND_VALUES hint in PL/SQL for faster data insertion. Best practices for...
You’ll notice that the supplied code has two possible statements to insert data, one is the single row insert for which I’ve shown the results, the other is for a small array insert. Both statements have a (commented out) hint to use use direct path inserts – and that makes a big...