java:82) Caused by: Error : 933, Position : 68, Sql = delete from org_reportcombinestru where code = '报表合并体系1';, OriginalSql = delete from org_reportcombinestru where code = '报表合并体系1';, Error Msg = ORA-00933: SQL 命令未正确结束 at oracle.jdbc.driver.T4CTTIoer11....
FIRST_ROWS(n)是针对整个目标SQL的Hint,它的含义是让优化器启用CBO模式,而且在得到目标SQL的执行计划时会选择那些能以最快的响应时间返回头n条记录的执行路径,也就是说在FIRST_ROWS(n) Hint生效的情况下,优化器会启用CBO,而且会依据返回头n条记录的响应时间来决定目标SQL的执行计划。 FIRST_ROWS(n)格式如下: ...
ORACLE_TNS_Combine_SessKeys (&decrypted_server_sesskey[16],&decrypted_client_sesskey[16], combined_sesskeys); ORACLE_TNS_Decrypt_AES128_CBC (combined_sesskeys, auth_password,auth_password_len, (unsigned char*) decrypted_password); passlen = terminate_ascii_string (&decrypted_password[16],auth...
optimizer_mode string ALL_ROWS select * from v$parameter where name='optimizer_mode' SQL> alter session set optimizer_mode='RULE'; Oracle的hint可以直接影响优化器解析目标sql产生执行计划 Hint:可以影响目标sql是否能够被查询改写,merge,unnest,use_concat等 :优化器对执行路径的选择,full,index等 :对表连...
“-f”执行脚本中的hql语句:bin/hive -f /opt/module/hive/datas/hivef.sql 参数配置 查看当前所有的配置信息:set; 参数配置方式:1)配置文件:用户自定义配置会覆盖默认配置。另外,Hive也会读入Hadoop的配置,因为Hive是作为Hadoop的客户端启动的,Hive的配置会覆盖Hadoop的配置。配置文件的设定对本机启动的所有Hive...
optimizer_mode string ALL_ROWS 1. 2. 3. 4. 修改CBO 模式的三种方法: (1) Sessions级别 SQL> alter session set optimizer_mode=all_rows; 1. (2) 系统级别 pfile 参数: OPTIMIZER_MODE=RULE/CHOOSE/FIRST_ROWS/ALL_ROWS 1. 或者 SQL> alter system set optimizer_mode=all_rows; ...
PL/SQL Release 9.0.1.0.0 - Production CORE 9.0.1.0.0 Production TNS for Solaris:Version 9.0.1.0.0 - Production NLSRTL Version 9.0.1.0.0 - Production SQL> 8. SVRMGR什么意思? svrmgrl,Server Manager 9i下没有,曾经改为用SQLPLUS了 sqlplus /nolog 变为归档日志型的 ...
resumable_name -- text string to help identify resumable statementresumable_timeout -- wait time (in seconds) for RESUMABLE(默认7200)date_cache -- size (in entries) of date conversion cache(默认1000) PLEASE NOTE: 命令行参数可以由位置或关键字指定。前者的例子是 'sqlloadscott/tiger foo'; 后...
The RHS can be eitherFoot 2 a SQL expression or keyword PATH followed by a SQL/JSON path expression wrapped with single quotation marks ('). A json_transform RHS path expression is more general that the path expressions allowed elsewhere. It is an expression that can combine multiple path ...
UNION, INTERSECT, and MINUS SQL Operations In Oracle, the `UNION` command is used to combine the results of two separate `SELECT` queries into a single result set while ensuring distinct rows (i.e., it removes duplicates). If you want to include duplicate rows, you can use `UNION ALL`...