94e1385ed2
For log(base, +Infinity) where 0 < base < 1, the correct output is -Infinity, not +Infinity as we had been giving. log(1, x) is erroneous regardless of x. Formerly we returned +Infinity when x is +Infinity, and threw a rather confusing "division by zero" error for finite-positive x. Change both cases to report "cannot take logarithm using base one". While the cases with infinite inputs are clearly wrong, it's not clear that people would appreciate such a behavior change in stable branches, so fix master only. Author: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/08270B8B-634F-4381-9D6F-9BDB18DA82A0@gmail.com
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
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