Foreign key creation on table with huge record count.

[Gambhir Singh <gambhir.singh05@xxxxxxxxx>]

Hi, 

I have a table with a record count of around 100 Million records. while creating foreign key on the table took a significant amount time to get created.

Is there any way to speed up the execution of creation of foreign key constraint ?

do we have parallel hint like option in postgreSQL as there in Oracle. 

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Thanks & Regards
Gambhir Singh