PostgreSQL 9.3.25 Documentation
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# E.28. Release 9.2.23

Release date: 2017-08-31

This release contains a small number of fixes from 9.2.22. For information about new features in the 9.2 major release, see Section E.51.

The PostgreSQL community will stop releasing updates for the 9.2.X release series in September 2017. Users are encouraged to update to a newer release branch soon.

## E.28.1. Migration to Version 9.2.23

A dump/restore is not required for those running 9.2.X.

However, if you are upgrading from a version earlier than 9.2.22, see Section E.29.

## E.28.2. Changes

- Show foreign tables in `information_schema`.`table_privileges` view (Peter Eisentraut)

  All other relevant `information_schema` views include foreign tables, but this one ignored them.

  Since this view definition is installed by initdb, merely upgrading will not fix the problem. If you need to fix this in an existing installation, you can, as a superuser, do this in psql:

      SET search_path TO information_schema;
      CREATE OR REPLACE VIEW table_privileges AS
          SELECT CAST(u_grantor.rolname AS sql_identifier) AS grantor,
                 CAST(grantee.rolname AS sql_identifier) AS grantee,
                 CAST(current_database() AS sql_identifier) AS table_catalog,
                 CAST(nc.nspname AS sql_identifier) AS table_schema,
                 CAST(c.relname AS sql_identifier) AS table_name,
                 CAST(c.prtype AS character_data) AS privilege_type,
                 CAST(
                   CASE WHEN
                        -- object owner always has grant options
                        pg_has_role(grantee.oid, c.relowner, 'USAGE')
                        OR c.grantable
                        THEN 'YES' ELSE 'NO' END AS yes_or_no) AS is_grantable,
                 CAST(CASE WHEN c.prtype = 'SELECT' THEN 'YES' ELSE 'NO' END AS yes_or_no) AS with_hierarchy

          FROM (
                  SELECT oid, relname, relnamespace, relkind, relowner, (aclexplode(coalesce(relacl, acldefault('r', relowner)))).* FROM pg_class
               ) AS c (oid, relname, relnamespace, relkind, relowner, grantor, grantee, prtype, grantable),
               pg_namespace nc,
               pg_authid u_grantor,
               (
                 SELECT oid, rolname FROM pg_authid
                 UNION ALL
                 SELECT 0::oid, 'PUBLIC'
               ) AS grantee (oid, rolname)

          WHERE c.relnamespace = nc.oid
                AND c.relkind IN ('r', 'v', 'f')
                AND c.grantee = grantee.oid
                AND c.grantor = u_grantor.oid
                AND c.prtype IN ('INSERT', 'SELECT', 'UPDATE', 'DELETE', 'TRUNCATE', 'REFERENCES', 'TRIGGER')
                AND (pg_has_role(u_grantor.oid, 'USAGE')
                     OR pg_has_role(grantee.oid, 'USAGE')
                     OR grantee.rolname = 'PUBLIC');

  This must be repeated in each database to be fixed, including `template0`.

- Clean up handling of a fatal exit (e.g., due to receipt of SIGTERM) that occurs while trying to execute a `ROLLBACK` of a failed transaction (Tom Lane)

  This situation could result in an assertion failure. In production builds, the exit would still occur, but it would log an unexpected message about "cannot drop active portal".

- Remove assertion that could trigger during a fatal exit (Tom Lane)

- Correctly identify columns that are of a range type or domain type over a composite type or domain type being searched for (Tom Lane)

  Certain `ALTER` commands that change the definition of a composite type or domain type are supposed to fail if there are any stored values of that type in the database, because they lack the infrastructure needed to update or check such values. Previously, these checks could miss relevant values that are wrapped inside range types or sub-domains, possibly allowing the database to become inconsistent.

- Change ecpg's parser to allow `RETURNING` clauses without attached C variables (Michael Meskes)

  This allows ecpg programs to contain SQL constructs that use `RETURNING` internally (for example, inside a CTE) rather than using it to define values to be returned to the client.

- Improve selection of compiler flags for PL/Perl on Windows (Tom Lane)

  This fix avoids possible crashes of PL/Perl due to inconsistent assumptions about the width of `time_t` values. A side-effect that may be visible to extension developers is that `_USE_32BIT_TIME_T` is no longer defined globally in PostgreSQL Windows builds. This is not expected to cause problems, because type `time_t` is not used in any PostgreSQL API definitions.

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