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74618e2b82
* Add option to build with OpenSSL out of the box. Fix thusly exposed bit rot. Although it compiles now, getting this to do something useful is left as an exercise. * Fix Kerberos options to defer checking for required libraries until all the other libraries are checked for. * Change default odbcinst.ini and krb5.srvtab path to PREFIX/etc. * Install work around for Autoconf's install-sh relative path anomaly. Get rid of old INSTL_*_OPTS variables, now that we don't need them anymore. * Use `gunzip -c' instead of g?zcat. Reportedly broke on AIX. * Look for only one of readline.h or readline/readline.h, not both. * Make check for PS_STRINGS cacheable. Don't test for the header files separately. * Disable fcntl(F_SETLK) test on Linux. * Substitute the standard GCC warnings set into CFLAGS in configure, don't add it on in Makefile.global. * Sweep through contrib tree to teach makefiles standard semantics. ... and in completely unrelated news: * Make postmaster.opts arbitrary options-aware. I still think we need to save the environment as well. |
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| .. | ||
| Makefile | ||
| README.statmath | ||
| statmath.c | ||
| statmath.sql.in | ||
Statistical aggregate functions for PostgreSQL.
This module provides some aggregate functions for statistical
mathematics. A new datatype holding two double precision
floating point values is required by them.
The aggregates are:
average(float8) average value computed by
n
___
_ 1 \
x = --- > x
n /__ i
i=1
variance(float8 variance computed by
n
___
2 1 \ _ 2
s = --- > (x - x)
n-1 /__ i
i=1
stddev(float8) standard deviation computed by
_____
/ 2
s = / s
\/
--
Jan Wieck <JanWieck@Yahoo.com>