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3d79013b97
Previously the changes to the "data" part of the sequence, i.e. the one containing the current value, were not transactional, whereas the definition, including minimum and maximum value were. That leads to odd behaviour if a schema change is rolled back, with the potential that out-of-bound sequence values can be returned. To avoid the issue create a new relfilenode fork whenever ALTER SEQUENCE is executed, similar to how TRUNCATE ... RESTART IDENTITY already is already handled. This commit also makes ALTER SEQUENCE RESTART transactional, as it seems to be too confusing to have some forms of ALTER SEQUENCE behave transactionally, some forms not. This way setval() and nextval() are not transactional, but DDL is, which seems to make sense. This commit also rolls back parts of the changes made in 3d092fe540 and f8dc1985f as they're now not needed anymore. Author: Andres Freund Discussion: https://postgr.es/m/20170522154227.nvafbsm62sjpbxvd@alap3.anarazel.de Backpatch: Bug is in master/v10 only
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.