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In the short time this function has existed, it's already proven to be a nontrivial maintenance burden, since it has to be updated whenever a node tag is added or removed. Although in principle we could now automate that, I see little justification for having such functionality here at all. The function is only being applied to utility statements, for which we already have infrastructure for obtaining string names. Moreover, that infrastructure produces already-familiar-to-users names, unlike nodetag_to_string(). So, remove this function and use the existing infrastructure instead. That saves over a thousand lines of largely-unreachable code. Back-patch to v15 where this code came in. Although it seems unlikely that v15's nodetag list will change anymore, we might as well keep the two branches looking and acting alike; otherwise back-patching any test-results changes in this area will be painful. Discussion: https://postgr.es/m/843818.1659218928@sss.pgh.pa.us
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/.