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petere Add primary keys and unique constraints to system catalogs

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Jan 30, 2021

Add primary keys and unique constraints to system catalogs

For those system catalogs that have a unique indexes, make a primary
key and unique constraint, using ALTER TABLE ... PRIMARY KEY/UNIQUE
USING INDEX.

This can be helpful for GUI tools that look for a primary key, and it
might in the future allow declaring foreign keys, for making schema
diagrams.

The constraint creation statements are automatically created by
genbki.pl from DECLARE_UNIQUE_INDEX directives.  To specify which one
of the available unique indexes is the primary key, use the new
directive DECLARE_UNIQUE_INDEX_PKEY instead.  By convention, we
usually make a catalog's OID column its primary key, if it has one.

Reviewed-by: Tom Lane <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/[email protected]

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PostgreSQL Database Management System
=====================================

This directory contains the source code distribution of the PostgreSQL
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