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Due to lack of concern for the case in the dependency code, it's possible to drop a column of a composite type even though stored queries have references to the dropped column via functions-in-FROM that return the composite type. There are "soft" references, namely FROM-clause aliases for such columns, and "hard" references, that is actual Vars referring to them. The right fix for hard references is to add dependencies preventing the drop; something we've known for many years and not done (and this commit still doesn't address it). A "soft" reference shouldn't prevent a drop though. We've been around on this before (cf. |
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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/.