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Reject aggregates, window functions, and procedures. Aggregates failed anyway, though with a somewhat obscure error message. Window functions would hit an Assert or null-pointer dereference. Procedures seemed to work as long as you didn't try to do transaction control, but (a) transaction control is sort of the point of a procedure, and (b) it's not entirely clear that no bugs lurk in that path. Given the lack of testing of this area, it seems safest to be conservative in what we support. Also reject proretset functions, as the fastpath protocol can't support returning a set. Also remove an easily-triggered assertion that the given OID isn't 0; the subsequent lookups can handle that case themselves. Per report from Theodor-Arsenij Larionov-Trichkin. Back-patch to all supported branches. (The procedure angle only applies in v11+, of course.) Discussion: https://postgr.es/m/2039442.1615317309@sss.pgh.pa.us |
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README.git |
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/.