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For amcanreorderby scans the nodeIndexscan.c's reorder queue holds heap tuples, but the underlying table likely does not. Before this fix we'd return different types of slots, depending on whether the tuple came from the reorder queue, or from the index + table. While that could be fixed by signalling that the node doesn't return a fixed type of slot, it seems better to instead remove the separate slot for the reorder queue, and use ExecForceStoreHeapTuple() to store tuples from the queue. It's not particularly common to need reordering, after all. This reverts most of the iss_ReorderQueueSlot related changes to nodeIndexscan.c made in 1a0586de3657cd3, except that now ExecForceStoreHeapTuple() is used instead of ExecStoreHeapTuple(). Noticed when testing zheap against the in-core version of tableam. Author: Andres Freund
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/.