On 5/26/23 08:38, Peter J. Holzer wrote:
On 2023-05-25 08:10:42 -0500, Ron wrote:
(You can create the FKs ahead of time, but use the NOT VALID clause; then,
after data is loaded do ALTER TABLE ... VALIDATE CONSTRAINT.)
I don't think this will work:
| Normally, [ADD CONSTRAINT] will cause a scan of the table to verify
| that all existing rows in the table satisfy the new constraint. But if
| the NOT VALID option is used, this potentially-lengthy scan is
| skipped. The constraint will still be enforced against subsequent
| inserts or updates
(https://www.postgresql.org/docs/current/sql-altertable.html)
I was probably thinking of tables with existing data.
--
Born in Arizona, moved to Babylonia.
