Dear Amit,

> Yes, that is correct. How about a comment as follows:
> /*
>  * Lock the sequence so its identity (namespace and name) cannot change
>  * under us via a concurrent DROP, RENAME or SET SCHEMA while we read it.
>  * The lock is released immediately rather than at transaction end. The
>  * later synchronization does not depend on this captured identity
>  * remaining valid, as it re-opens the sequence and tolerates concurrent
>  * changes. Releasing early also avoids holding one lock per sequence,
>  * which could exhaust the lock table.
>  */

LGTM.

Best regards,
Hayato Kuroda
FUJITSU LIMITED

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