d9476b8380
Some of the older OS X critters in the buildfarm are failing regression, with symptoms showing that a request for 100% sampling in BERNOULLI or SYSTEM methods actually gets only around 50% of the table. gdb revealed that the computation of the "cutoff" number was producing 0x7FFFFFFF rather than the expected 0x100000000. Inspecting the assembly code, it looks like gcc is trying to use lrint() instead of rint() and then fumbling the conversion from long double to uint64. This seems like a clear compiler bug, but assigning the intermediate result into a plain double variable works around it, so let's just do that. (Another idea would be to give up one bit of hash width so that we don't need to use a uint64 cutoff, but let's see if this is enough.)
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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.