ORA-30476：PLAN_TABLE does not exist in the user's schema
错误码
错误描述：PLAN_TABLE does not exist in the user's schema
错误原因：Estimate_Summary_Size uses Oracle SQL "EXPLAIN PLAN" command to estimate cardinality of the specified select-clause. This requires a table called the PLAN_TABLE in the user's schema. For more information refer to the SQL Reference Manual.
解决方法：Create the PLAN_TABLE as described for EXPLAIN PLAN. On most systems a script utlxplan.sql will create this table.
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