bdc5dedfca
In a7f107df2 I changed subplan param evaluation to happen within the containing expression. As part of that, ExecInitSubPlanExpr() was changed to evaluate parameters via a new EEOP_PARAM_SET expression step. These parameters were temporarily stored into ExprState->resvalue/resnull, with some reasoning why that would be fine. Unfortunately, that analysis was wrong - ExecInitSubscriptionRef() evaluates the input array into "resv"/"resnull", which will often point to ExprState->resvalue/resnull. This means that the EEOP_PARAM_SET, if inside an array subscript, would overwrite the input array to array subscript. The fix is fairly simple - instead of evaluating into ExprState->resvalue/resnull, store the temporary result of the subplan in the subplan's return value. Bug: #19370 Reported-by: Zepeng Zhang <redraiment@gmail.com> Diagnosed-by: Tom Lane <tgl@sss.pgh.pa.us> Diagnosed-by: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/19370-7fb7a5854b7618f1@postgresql.org Backpatch-through: 18
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/18/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/18/installation.html.
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