Updating an oracle sequence nextval


12-Nov-2020 06:40

Typically, sequence-enabled databases also support RETURNING for INSERT statements, which is used automatically by SQLAlchemy when emitting this statement.

However if RETURNING is not used for a particular insert, then SQLAlchemy would prefer to “pre-execute” the sequence outside of the INSERT statement itself, which only works if the sequence is included as the Python-side default generator function.

updating an oracle sequence nextval-69

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For primary key columns, SQLAlchemy will in most cases use these capabilities automatically.SEQUENCE And NEXTVAL Oracle uses the concept of SEQUENCE to create numerical primary key values as we add rows of data into a table.



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