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Investigation of 2d2d06b7e27e3177d5bef0061801c75946871db3 revealed that identity values were not applied in some further cases, including logical replication subscribers, VALUES RTEs, and ALTER TABLE ... ADD COLUMN. To fix all that, apply the identity column expression in build_column_default() instead of repeating the same logic at each call site. For ALTER TABLE ... ADD COLUMN ... IDENTITY, the previous coding completely ignored that existing rows for the new column should have values filled in from the identity sequence. The coding using build_column_default() fails for this because the sequence ownership isn't registered until after ALTER TABLE, and we can't do it before because we don't have the column in the catalog yet. So we specially remember in ColumnDef the sequence name that we decided on and build a custom NextValueExpr using that. Reviewed-by: Michael Paquier <michael.paquier@gmail.com>
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/.