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006284b2ef
preference for filling pages out-of-order tends to confuse the sanity checks in md.c, as per report from Balazs Nagy in bug #2737. The fix is to ensure that the smgr-level code always has the same idea of the logical EOF as the hash index code does, by using ReadBuffer(P_NEW) where we are adding a single page to the end of the index, and using smgrextend() to reserve a large batch of pages when creating a new splitpoint. The patch is a bit ugly because it avoids making any changes in md.c, which seems the most prudent approach for a backpatchable beta-period fix. After 8.3 development opens, I'll take a look at a cleaner but more invasive patch, in particular getting rid of the now unnecessary hack to allow reading beyond EOF in mdread(). Backpatch as far as 7.4. The bug likely exists in 7.3 as well, but because of the magnitude of the 7.3-to-7.4 changes in hash, the later-version patch doesn't even begin to apply. Given the other known bugs in the 7.3-era hash code, it does not seem worth trying to develop a separate patch for 7.3. |
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| COPYRIGHT | ||
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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. The JDBC, ODBC, C++, Python, and Tcl interfaces have been moved to the PostgreSQL Projects Web Site at http://gborg.postgresql.org for separate maintenance. A Perl DBI/DBD driver is available from CPAN. 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. Changes between all PostgreSQL releases are recorded in the file HISTORY. 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 ftp://ftp.postgresql.org/pub/. For more information look at our web site located at http://www.postgresql.org/.