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/.
Tom Lane
authored
The true explanation for Peter Eisentraut's report of inexact asind results seems to be that (a) he's compiling into x87 instruction set, which uses wider-than-double float registers, plus (b) the library function asin() on his platform returns a result that is wider than double and is not rounded to double width. To fix, we have to force the function's result to be rounded comparably to what happened to the scaling constant asin_0_5. Experimentation suggests that storing it into a volatile local variable is the least ugly way of making that happen. Although only asin() is known to exhibit an observable inexact result, we'd better do this in all the places where we're hoping to get an exact result by scaling.
| Name | Last commit | Last update |
|---|---|---|
| config | ||
| contrib | ||
| doc | ||
| src | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| COPYRIGHT | ||
| GNUmakefile.in | ||
| HISTORY | ||
| Makefile | ||
| README | ||
| README.git | ||
| aclocal.m4 | ||
| configure | ||
| configure.in |