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The function pg_mcv_list_items() returns values stored in MCV items. The items may contain columns with different data types, so the function was generating text array-like representation, but in an ad-hoc way without properly escaping various characters etc. Fixed by simply building a text[] array, which also makes it easier to use from queries etc. Requires changes to pg_proc entry, so bump catversion. Backpatch to 12, where multi-column MCV lists were introduced. Author: Tomas Vondra Reviewed-by: Dean Rasheed Discussion: https://postgr.es/m/20190618205920.qtlzcu73whfpfqne@development |
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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/.