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Allow hypertable constraint creation USING INDEX #7040

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Allow hypertable constraint creation USING INDEX #7040

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Commits on Aug 27, 2024

  1. Allow hypertable constraint creation USING INDEX 

    Before this commit, the following operation was disallowed:

```sql
ALTER TABLE foo ADD CONSTRAINT foo_pkey
PRIMARY KEY USING INDEX foo_pkey
```

pgcopydb, the tool that powers our migration process[1], handles primary key
and unique constraint migrations in two steps:

1. Build unique indexes.
2. Create the unique constraint or primary key using the unique index created
   in step 1.

This multi-step approach is useful for reducing the time spent on
EXCLUSIVE LOCKS while building unique constraints or primary keys.

[1] https://docs.timescale.com/migrate/latest/live-migration/

Signed-off-by: Arunprasad Rajkumar <[email protected]>
    @arajkumar
    arajkumar committed Aug 27, 2024
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