Thank you for contributing to CockroachDB. Please ensure you have followed the guidelines for creating a PR.

My owl senses detect your PR is good for review. Please keep an eye out for any test failures in CI.

_{🦉 Hoot! I am a Blathers, a bot for CockroachDB. My owner is otan.}

This change is 

Thank you for updating your pull request.

My owl senses detect your PR is good for review. Please keep an eye out for any test failures in CI.

_{🦉 Hoot! I am a Blathers, a bot for CockroachDB. My owner is otan.}

Hey @ekalinin, thanks for your contribution! However, this doesn't do what we want. Right now, your virtual index is ignoring the input constraint value and generating all rows of the table instead. You should be using the input constraint to return only the row of the oid requested.

Hey @ekalinin, thanks for your contribution! However, this doesn't do what we want. Right now, your virtual index is ignoring the input constraint value and generating all rows of the table instead. You should be using the input constraint to return only the row of the oid requested.

Thanks for response, @rohany !
Could you help me with this?

I'm trying to use the input constraint value like this:

	indexes: []virtualIndex{
		{
			partial: false,
			populate: func(ctx context.Context, constraint tree.Datum, p *planner, db *sqlbase.ImmutableDatabaseDescriptor,
				addRow func(...tree.Datum) error) (bool, error) {
				oid := tree.MustBeDOid(constraint)
				fmt.Printf("--> populate index: oid: %+v\n", oid)
				tbl, err := p.LookupTableByID(ctx, sqlbase.ID(oid.DInt))
				if err != nil {
					fmt.Printf("--> populate index: lookup err=%+v\n", err)
					if sqlbase.IsUndefinedRelationError(err) {
						fmt.Printf("--> populate index: IsUndefinedRelationError\n")
						return false, nil
					}
					return false, err
				}
  // ...

and getting an error:

➜ ./cockroach demo 
root@127.0.0.1:34233/movr> select * from pg_type where oid = 1000;
--> populate index: oid: 1000
--> populate index: lookup err=relation "[1000]" does not exist

You're on the right track! You'll first want to check if the input oid is one of the predefined type oids. If not, then you'll want to look up the oid's TypeDescriptor. Note that the oid of a type doesn't directly correspond to its descriptor ID. You have to use types.UserDefinedTypeOIDToID to do the conversion.

Thank you for updating your pull request.

Before a member of our team reviews your PR, I have some potential action items for you:

• We notice you have more than one commit in your PR. We try break logical changes into separate commits, but commits such as "fix typo" or "address review commits" should be squashed into one commit and pushed with --force
• Please ensure your git commit message contains a release note.
• When CI has completed, please ensure no errors have appeared.

_{🦉 Hoot! I am a Blathers, a bot for CockroachDB. My owner is otan.}

You're on the right track! You'll first want to check if the input oid is one of the predefined type oids. If not, then you'll want to look up the oid's TypeDescriptor. Note that the oid of a type doesn't directly correspond to its descriptor ID. You have to use types.UserDefinedTypeOIDToID to do the conversion.

Hey @rohany! Thanks for the hints! I hope i understood them correctly.
PTAL.

Thanks for the contribution! This is ready to go.

bors r=rohany

Build succeeded

• GitHub CI (Cockroach)