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Dean Rasheed c4e44224cf Extend mul_var_short() to 5 and 6-digit inputs. 
Commit ca481d3c9a introduced mul_var_short(), which is used by
mul_var() whenever the shorter input has 1-4 NBASE digits and the
exact product is requested. As speculated on in that commit, it can be
extended to work for more digits in the shorter input. This commit
extends it up to 6 NBASE digits (up to 24 decimal digits), for which
it also gives a significant speedup. This covers more cases likely to
occur in real-world queries, for which using base-NBASE^2 arithmetic
provides little benefit.

To avoid code bloat and duplication, refactor it a bit using macros
and exploiting the fact that some portions of the code are shared
between the different cases.

Dean Rasheed, reviewed by Joel Jacobson.

Discussion: https://postgr.es/m/9d8a4a42-c354-41f3-bbf3-199e1957db97%40app.fastmail.com
2024-08-15 10:33:12 +01:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
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contrib Mark misc static global variables as const 2024-08-06 23:04:48 +03:00
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src Extend mul_var_short() to 5 and 6-digit inputs. 2024-08-15 10:33:12 +01:00
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README.md

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.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.