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The process of compiling a stored procedure part way through that procedure's execution.
When Oracle needs to make a change to the tables maintained for internal processing, it internally generates an internal SQL statement, which in turn generates a recursive call.
Recursive calls occur because of cache misses and dynamic storage extension. If the dictionary data is found in cache, a recursive call is not made and the data is read from cache directly.
Referential Integrity ensures that foreign keys correctly map to primary keys. A referential constraint prevents the insertion or update of foreign keys for which there are no matching primary keys. It either prevents the deletion of primary keys if foreign keys exist, or deletes these foreign rows (DELETE CASCADE).
A major functional part of Oracle. Responsible for the parsing and optimization of SQL requests, controls query plan execution, and processes row sets from the storage engine.
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