c0fc075186
SQL/JSON query functions allow specifying an expression to return when either of ON ERROR or ON EMPTY condition occurs when evaluating the JSON path expression. The parser (transformJsonBehavior()) checks that the specified expression is one of the supported expressions, but there are two issues with how the check is done that are fixed in this commit: * No check for some expressions related to coercion, such as CoerceViaIO, that may appear in the transformed user-specified expressions that include cast(s) * An unsupported expression may be masked by a coercion-related expression, which must be flagged by checking the latter's argument expression recursively Author: Jian He <jian.universality@gmail.com> Author: Amit Langote <amitlangote09@gmail.com> Reported-by: Jian He <jian.universality@gmail.com> Discussion: https://postgr.es/m/CACJufxEqhqsfrg_p7EMyo5zak3d767iFDL8vz_4%3DZBHpOtrghw@mail.gmail.com Discussion: https://postgr.es/m/CACJufxGOerH1QJknm1noh-Kz5FqU4p7QfeZSeVT2tN_4SLXYNg@mail.gmail.com
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.