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"relkind" normally refers to the char field from pg_class. However, in the parse nodes AlterTableStmt and CreateTableAsStmt, "relkind" was used for a field of type enum ObjectType, that could refer to other object types than those possible for a relkind. Such fields being usually named "objtype", switch the name in both structures to make things more consistent. Note that this led to some confusion in functions that also operate on a RangeTableEntry object, which also has a field named "relkind". This naming goes back to commit 09d4e96, where only OBJECT_TABLE and OBJECT_INDEX were used. This got extended later to use as well OBJECT_TYPE with e440e12, not really a relation kind. Author: Mark Dilger Reviewed-by: Daniel Gustafsson, Álvaro Herrera, Michael Paquier Discussion: https://postgr.es/m/609181AE-E399-47C7-9221-856E0F96BF93@enterprisedb.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/.