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We attached no schema label to comments for procedural languages, casts, transforms, operator classes, operator families, or text search objects. The first three categories of objects don't really have schemas, but pg_dump treats them as if they do, and it seems like the TocEntry fields for their comments had better match the TocEntry fields for the parent objects. (As an example of a possible hazard, the type names in a CAST will be formatted with the assumption of a particular search_path, so failing to ensure that this same path is active for the COMMENT ON command could lead to an error or to attaching the comment to the wrong cast.) In the last six cases, this was a flat-out error --- possibly mine to begin with, but it was a long time ago. The security label for a procedural language was likewise not correctly labeled as to schema, and both the comment and security label for a procedural language were not correctly labeled as to owner. In simple cases the restore would accidentally work correctly anyway, since these comments and security labels would normally get emitted right after the owning object, and so the search path and active user would be correct anyhow. But it could fail in corner cases; for example a schema-selective restore would omit comments it should include. Giuseppe Broccolo noted the oversight, and proposed the correct fix, for text search dictionary objects; I found the rest by cross-checking other dumpComment() calls. These oversights are ancient, so back-patch all the way. Discussion: https://postgr.es/m/CAFzmHiWwwzLjzwM4x5ki5s_PDMR6NrkipZkjNnO3B0xEpBgJaA@mail.gmail.com |
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README
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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.