AWS RDS Postgresql 12.10
We've got tables with columns of data type NUMERIC(38,0) which are a legacy from an Oracle migration.
Besides what's mentioned in
https://www.postgresql.org/docs/12/ddl-alter.html#id-1.5.4.8.10, what happens
internally when I run:
ALTER TABLE foo ALTER COLUMN bar TYPE BIGINT;
I'm thinking mostly of record fragmentation.
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