How to choose “non recommended” character sets(US7ASCII、WE8ISO8859P1) in DBCA 11G, 12C or later

We limit the default display of database character sets that can be used for a new database in Oracle Database 11 via DBCA (Database Creation Assistant) based on the recommended list.

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Oracle 12.2 DB alert show “WARNING: too many parse errors” or “__Oracle_JDBC_internal_ROWID__” in sql

alert log中出现了大量的”WARNING: too many parse errors”,是以前的版本中从未见过,这也是12.2的新特性,自动生成解析失败的信息写入db alert log, 即使没有在数据库启用event 10035,当JDBC 中scroll sensitive resultset 启用时,JDBC驱动就会在用户SQL中自动增加ROWID

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