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If a view lacks an INSTEAD OF trigger, DML on it can only work by rewriting the command into a command on the underlying base table(s). Then we will fire triggers attached to those table(s), not those for the view. This seems appropriate from a consistency standpoint, but nowhere was the behavior explicitly documented, so let's do that. There was some discussion of throwing an error or warning if a statement trigger is created on a view without creating a row INSTEAD OF trigger. But a simple implementation of that would result in dump/restore ordering hazards. Given that it's been like this all along, and we hadn't heard a complaint till now, a documentation improvement seems sufficient. Per bug #15106 from Pu Qun. Back-patch to all supported branches. Discussion: https://postgr.es/m/152083391168.1215.16892140713507052796@wrigleys.postgresql.org |
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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/.