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Daily work ORACLE12CR2 problems encountered in daily work

Source: Internet
Author: User
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  1. ORACLE12C Database GS instance needs to use the new driver, avoids the system single occurrence obtains not the correct voucher number inside the code question.
  2. ORACLE12C will produce a large number of hidden tables, and some DDL statements will error.
  3. oracle12c deleted the Vm_concat function, it needs to be created manually, solve the supply chain, the new receivable line-to-column function error (it is recommended to use a new function to rewrite the code, Oracle has discarded this function).
  4. Oracle12.1.0.2 Release 4 has a problem with the odp.net driver, which causes IIS to crash and is not recommended for this release.
  5. Oracle12.2 's odp.net drivers often have abnormal hints, which are said to be about 30% performance drops (from Ziba manager)
  6. ORACLE12C The hidden parameters of the _cursor_obsolete_threshold, you need to modify the size to avoid concurrency when the exception problem. command to modify parameters: Alter system Set "_cursor_obsolete_threshold" =1024 scope=spfile

Daily work ORACLE12CR2 problems encountered in daily work

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