2016-01-27 DBA_HIST_SQLSTAT.OPTIMIZER_ENV_HASH_VALUE Oracle V$SQL.OPTIMIZER_ENV_HASH_VALUE DBA_HIST_SQLSTAT.OPTIMIZER_ENV_HASH_VALUE V$SQL.OPTIMIZER_ENV DBA_HIST_OPTIMIZER_ENV.OPTIMIZER_ENV DBMS_SQLDIAG.DUMP_TRACE DBMS_SQLTUNE.SQLSET_ROW DBMS_SQLTUNE_INTERNAL 参考 Optimizer Environment | Oracle Scratchpad Structured Data | Creating Optimizer Trace Files
