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A cascaded drop might find independent reasons to drop both a table and some column of the table (for instance, a schema drop might include dropping a data type used in some table in the schema). Depending on the order of visitation of pg_depend entries, we might report the table column and the whole table as separate objects-to-be-dropped, or we might only report the table. This is confusing and leads to unstable regression test output, so fix it to report only the table regardless of visitation order. Per gripe from Peter Geoghegan. This is just cosmetic from a user's standpoint, and we haven't actually seen regression test problems in practice (yet), so I'll refrain from back-patching. Discussion: https://postgr.es/m/15908.1547762076@sss.pgh.pa.us |
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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/.