How to avoid “ORA-00932: inconsistent datatypes: expected – got CLOB” when distinct CLOB datatypes.
Large objects (LOBs) are not supported in comparison conditions. However, you can use PL/SQL programs for comparisons on CLOB data.
Month: December 2013
skgpspawn failed:category = 27143 in alert log
skgpspawn failed:category = 27143, depinfo = 24, op = pipe, loc = skgpspawn2
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oracle 12c new feature 隐藏列(invisible columns)
oracle 12c release 1版本引入新功能可隐藏列(invisible columns),这个特性有很多的争议，不明白为什么ORACLE会推出这个特性，因为这个特性可能会带来很多麻烦..
Adaptive Cursor Sharing in 11R2 performance issues(自适应游标共享问题案例)
今天开发的同事找我说是一个报表系统的SQL执行第一次很快，再执行就慢的几乎查询无响应，找他要来了SQL，也是常见的表关连LIFT JOIN 、GROUP BY的统计报表, 出于篇幅原因不再贴SQL， 把SQL放到TOAD 中问题依然可以再现，..
Adaptive Log File Sync In 11gr2 (_use_adaptive_log_file_sync)
Adaptive Log File sync was introduced in 11.2. the feature is exactly enabled since release 11.2.0.3 , It’s enabled through an underscore parameter called _use_adaptive_log_file_sync and the description of this parameter is: adaptively switch between post/wait and polling. Oracle can switches between the 2 methods: Post/wait, traditional method for posting completion of writes to redo … Read more
How to enable SQL*Net Tracing with Oracle Instant Client 11G
Sometimes we need to enable sql*net trace to diagnose sqlplus connection problems such as ora-125*
Below are the steps to configure Sql*Net verbose Client side tracing: