Oracle Call Interface - History

History

Oracle Corporation first released OCI (under the name HLI, the Host Language Interface) with Oracle Database version 6 in 1988. As HLI (and subsequently OCI) operated as wrappers for UPI, their original naming conventions closely resembled those of the UPI calls they were based upon. For example, the rollback statement: the call upirol in UPI became orol in OCI.

Later, in Oracle8 (released in 1997), OCI calls acquired more descriptive names; orol became OCITransRollback. Subsequent improvements have been made in every version of OCI, including 11g (released in 2007). Oracle Corporation claims that OCI is "So reliable that every SQL statement in the Oracle Database executes with OCI".

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