e0a3a3fd53
Presently, such commands scan the input buffer one byte at a time looking for special characters. This commit adds a new path that uses SIMD instructions to skip over chunks of data without any special characters. This can be much faster. To avoid regressions, SIMD processing is disabled for the remainder of the COPY FROM command as soon as we encounter a short line or a special character (except for end-of-line characters, else we'd always disable it after the first line). This is perhaps too conservative, but it could probably be made more lenient in the future via fine-tuned heuristics. Author: Nazir Bilal Yavuz <byavuz81@gmail.com> Co-authored-by: Shinya Kato <shinya11.kato@gmail.com> Reviewed-by: Ayoub Kazar <ma_kazar@esi.dz> Reviewed-by: Andrew Dunstan <andrew@dunslane.net> Reviewed-by: Neil Conway <neil.conway@gmail.com> Reviewed-by: Greg Burd <greg@burd.me> Tested-by: Manni Wood <manni.wood@enterprisedb.com> Tested-by: Mark Wong <markwkm@gmail.com> Discussion: https://postgr.es/m/CAOzEurSW8cNr6TPKsjrstnPfhf4QyQqB4tnPXGGe8N4e_v7Jig%40mail.gmail.com |
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| contrib | ||
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| src | ||
| .cirrus.star | ||
| .cirrus.tasks.yml | ||
| .cirrus.yml | ||
| .dir-locals.el | ||
| .editorconfig | ||
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| .mailmap | ||
| aclocal.m4 | ||
| configure | ||
| configure.ac | ||
| COPYRIGHT | ||
| GNUmakefile.in | ||
| HISTORY | ||
| Makefile | ||
| meson.build | ||
| meson_options.txt | ||
| 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/.