mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-20 09:07:44 +03:00
69b8e1c779
This is "productization" of an old code that would enable extent elimination for dictionary columns. This concrete patch enables it, fixes perfomance degradation (main problem with old code) and also fixes incorrect behavior of cpimport.
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/*
|
|
Copyright (C) 2021, 2022 MariaDB Corporation
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; version 2 of
|
|
the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
/* handling of the conversion of string prefixes to int64_t for quick range checking */
|
|
|
|
#pragma once
|
|
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
|
|
#include "collation.h"
|
|
#include "joblisttypes.h"
|
|
|
|
|
|
// Encode string prefix into an int64_t, packing as many chars from string as possible
|
|
// into the result and respecting the collation provided by charsetNumber.
|
|
//
|
|
// For one example, for CI Czech collation, encodeStringPrefix("cz") < encodeStringPrefix("CH").
|
|
int64_t encodeStringPrefix(const uint8_t* str, size_t len, datatypes::Charset& cset);
|
|
|
|
int64_t encodeStringPrefix_check_null(const uint8_t* str, size_t len, datatypes::Charset& cset);
|