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Base de données relationnelle
5a73edf050
INSERT ... VALUES for a single VALUES row is implemented differently from a multi-row VALUES list, which causes inconsistent behaviour in the way that DEFAULT items are handled. In particular, when inserting into an auto-updatable view on top of a table with a column default, a DEFAULT item in a single VALUES row gets correctly replaced with the table column's default, but for a multi-row VALUES list it is replaced with NULL. Fix this by allowing rewriteValuesRTE() to leave DEFAULT items in the VALUES list untouched if the target relation is an auto-updatable view and has no column default, deferring DEFAULT-expansion until the query against the base relation is rewritten. For all other types of target relation, including tables and trigger- and rule-updatable views, we must continue to replace DEFAULT items with NULL in the absence of a column default. This is somewhat complicated by the fact that if an auto-updatable view has DO ALSO rules attached, the VALUES lists for the product queries need to be handled differently from the original query, since the product queries need to act like rule-updatable views whereas the original query has auto-updatable view semantics. Back-patch to all supported versions. Reported by Roger Curley (bug #15623). Patch by Amit Langote and me. Discussion: https://postgr.es/m/15623-5d67a46788ec8b7f@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/.