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Commit 3e1a373e2 missed teaching DecodeTimeOnly the same "ptype" manipulations it added to DecodeDateTime. While likely harmless at the time, it became a problem after 5b3c59535 added an error check that ptype must be zero once we exit the parsing loop (that is, there shouldn't be any unused prefixes). The consequence was that we'd reject time or timetz input like T12:34:56 (the "extended" format per ISO 8601-1:2019), even though that still worked in timestamp input. Since this is clearly under-tested code, add test cases covering all the ISO 8601 time formats. (Note: although 8601 allows just "Thh", we have never accepted that, and this patch doesn't change that. I'm content to leave that as-is because it seems too likely to be a mistake rather than intended input. If anyone wants to allow that, it should be a separate patch anyway, and not back-patched.) Per bug #18470 from David Perez. Back-patch to v16 where we broke it. Discussion: https://postgr.es/m/18470-34fad4c829106848@postgresql.org
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/.