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The CHECK_FOR_INTERRUPTS call in gingetbitmap turns out to be inadequate to prevent a long uninterruptible loop, because we now know a case where looping occurs within scanGetItem. While the next patch will fix the bug that caused that, it seems foolish to assume that no similar patterns are possible. Let's do the CFI within scanGetItem's retry loop, instead. This demonstrably allows canceling out of the loop exhibited in bug #19031. Bug: #19031 Reported-by: Tim Wood <washwithcare@gmail.com> Author: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/19031-0638148643d25548@postgresql.org Backpatch-through: 13 |
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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/.