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0e37489ed6
Tuple conversion incorrectly concluded that no conversion was needed as long as all the attributes lined up. But if the source tuple has a missing attribute (from addition of a column with default), then the destination tupdesc might not reflect the same default. The typical symptom was that the affected columns would be unexpectedly NULL. Repair by always forcing conversion if the source has missing attributes, which will be filled in by the deform operation. (In theory we could optimize for when the destination has the same default, but that seemed overkill.) Backpatch to 11 where missing attributes were added. Per bug #16242. Vik Fearing (discovery, code, testing) and me (analysis, testcase). Discussion: https://postgr.es/m/16242-d1c9fca28445966b@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/.