MySQL Ver 15.1 не разбивает таблицу - PullRequest
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MySQL Ver 15.1 не разбивает таблицу

0 голосов
/ 02 октября 2018

Я пытаюсь создать таблицу с разделением по диапазону лет, используя phpmyadmin на сервере с: 

mysql  Ver 15.1 Distrib 5.5.60-MariaDB, for Linux (x86_64) using readline 5.1

(используя mysql -V в Centos 7)

Код, который я использую для создания: 

CREATE TABLE `datosenfermedades` (
  `clues` varchar(15) NOT NULL,
  `unidadmedica` varchar(75) NOT NULL,
  `fechaconsulta` datetime NOT NULL,
  `idconsulta` int(15) NOT NULL,
  `clavediagnostico` varchar(6) NOT NULL,
  `primeravez` tinyint(1) NOT NULL,
  `clavemunicipio` int(3) NOT NULL,
  `edad` int(3) NOT NULL,
  `sexo` varchar(1) NOT NULL,
  `grupoedad` varchar(20) NOT NULL,
  `derechohabiencia` varchar(30) NOT NULL,
  `servicio` varchar(40) NOT NULL,
  `nivelatencion` int(1) NOT NULL
) 
PARTITION BY RANGE (year(fechaconsulta)) (
  PARTITION p0 VALUES LESS THAN (2008) ENGINE=MyISAM,
  PARTITION p1 VALUES LESS THAN (2009) ENGINE=MyISAM,
  PARTITION p2 VALUES LESS THAN (2010) ENGINE=MyISAM,
  PARTITION p3 VALUES LESS THAN (2011) ENGINE=MyISAM,
  PARTITION p4 VALUES LESS THAN (2012) ENGINE=MyISAM,
  PARTITION p5 VALUES LESS THAN (2013) ENGINE=MyISAM,
  PARTITION p6 VALUES LESS THAN (2014) ENGINE=MyISAM,
  PARTITION p7 VALUES LESS THAN (2015) ENGINE=MyISAM,
  PARTITION p8 VALUES LESS THAN (2016) ENGINE=MyISAM,
  PARTITION p9 VALUES LESS THAN (2017) ENGINE=MyISAM,
  PARTITION p10 VALUES LESS THAN (2018) ENGINE=MyISAM,
  PARTITION p11 VALUES LESS THAN (2019) ENGINE=MyISAM,
  PARTITION p12 VALUES LESS THAN (2020) ENGINE=MyISAM,
  PARTITION p13 VALUES LESS THAN (2021) ENGINE=MyISAM,
  PARTITION p14 VALUES LESS THAN (2022) ENGINE=MyISAM,
  PARTITION p15 VALUES LESS THAN (2023) ENGINE=MyISAM,
  PARTITION p16 VALUES LESS THAN (2024) ENGINE=MyISAM,
  PARTITION p17 VALUES LESS THAN (2025) ENGINE=MyISAM,
  PARTITION p18 VALUES LESS THAN (2026) ENGINE=MyISAM,
  PARTITION p19 VALUES LESS THAN (2027) ENGINE=MyISAM,
  PARTITION p20 VALUES LESS THAN (2028) ENGINE=MyISAM,
  PARTITION p21 VALUES LESS THAN (2029) ENGINE=MyISAM,
  PARTITION p22 VALUES LESS THAN (2030) ENGINE=MyISAM,
  PARTITION p23 VALUES LESS THAN (2031) ENGINE=MyISAM,
  PARTITION p24 VALUES LESS THAN (2032) ENGINE=MyISAM,
  PARTITION p25 VALUES LESS THAN (2033) ENGINE=MyISAM,
  PARTITION p26 VALUES LESS THAN (2034) ENGINE=MyISAM,
  PARTITION p27 VALUES LESS THAN (2035) ENGINE=MyISAM,
  PARTITION p28 VALUES LESS THAN (2036) ENGINE=MyISAM,
  PARTITION p29 VALUES LESS THAN (2037) ENGINE=MyISAM,
  PARTITION p30 VALUES LESS THAN (2038) ENGINE=MyISAM,
  PARTITION p31 VALUES LESS THAN (2039) ENGINE=MyISAM,
  PARTITION p32 VALUES LESS THAN (2040) ENGINE=MyISAM,
  PARTITION p33 VALUES LESS THAN (2041) ENGINE=MyISAM,
  PARTITION p34 VALUES LESS THAN (2042) ENGINE=MyISAM,
  PARTITION p35 VALUES LESS THAN (2043) ENGINE=MyISAM,
  PARTITION p36 VALUES LESS THAN (2044) ENGINE=MyISAM,
  PARTITION p37 VALUES LESS THAN (2045) ENGINE=MyISAM,
  PARTITION p38 VALUES LESS THAN (2046) ENGINE=MyISAM,
  PARTITION p39 VALUES LESS THAN (2047) ENGINE=MyISAM,
  PARTITION p40 VALUES LESS THAN (2048) ENGINE=MyISAM,
  PARTITION p41 VALUES LESS THAN (2049) ENGINE=MyISAM,
  PARTITION p42 VALUES LESS THAN MAXVALUE ENGINE=MyISAM
);

Таблица, очевидно, правильно создана, и когда я использую команду SHOW CREATE TABLE datosenfermedades, я получаю: 

CREATE TABLE `datosenfermedades` (
     `clues` varchar(15) COLLATE utf8_spanish_ci NOT NULL,
     `unidadmedica` varchar(75) COLLATE utf8_spanish_ci NOT NULL,
     `fechaconsulta` datetime NOT NULL,
     `idconsulta` int(15) NOT NULL,
     `clavediagnostico` varchar(6) COLLATE utf8_spanish_ci NOT NULL,
     `primeravez` tinyint(1) NOT NULL,
     `clavemunicipio` int(3) NOT NULL,
     `edad` int(3) NOT NULL,
     `sexo` varchar(1) COLLATE utf8_spanish_ci NOT NULL,
     `grupoedad` varchar(20) COLLATE utf8_spanish_ci NOT NULL,
     `derechohabiencia` varchar(30) COLLATE utf8_spanish_ci NOT NULL,
     `servicio` varchar(40) COLLATE utf8_spanish_ci NOT NULL,
     `nivelatencion` int(1) NOT NULL
    ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_spanish_ci
    /*!50100 PARTITION BY RANGE (year(fechaconsulta))
    (PARTITION p0 VALUES LESS THAN (2008) ENGINE = MyISAM,
    PARTITION p1 VALUES LESS THAN (2009) ENGINE = MyISAM,
    PARTITION p2 VALUES LESS THAN (2010) ENGINE = MyISAM,
    PARTITION p3 VALUES LESS THAN (2011) ENGINE = MyISAM,
    PARTITION p4 VALUES LESS THAN (2012) ENGINE = MyISAM,
    PARTITION p5 VALUES LESS THAN (2013) ENGINE = MyISAM,
    PARTITION p6 VALUES LESS THAN (2014) ENGINE = MyISAM,
    PARTITION p7 VALUES LESS THAN (2015) ENGINE = MyISAM,
    PARTITION p8 VALUES LESS THAN (2016) ENGINE = MyISAM,
    PARTITION p9 VALUES LESS THAN (2017) ENGINE = MyISAM,
    PARTITION p10 VALUES LESS THAN (2018) ENGINE = MyISAM,
    PARTITION p11 VALUES LESS THAN (2019) ENGINE = MyISAM,
    PARTITION p12 VALUES LESS THAN (2020) ENGINE = MyISAM,
    PARTITION p13 VALUES LESS THAN (2021) ENGINE = MyISAM,
    PARTITION p14 VALUES LESS THAN (2022) ENGINE = MyISAM,
    PARTITION p15 VALUES LESS THAN (2023) ENGINE = MyISAM,
    PARTITION p16 VALUES LESS THAN (2024) ENGINE = MyISAM,
    PARTITION p17 VALUES LESS THAN (2025) ENGINE = MyISAM,
    PARTITION p18 VALUES LESS THAN (2026) ENGINE = MyISAM,
    PARTITION p19 VALUES LESS THAN (2027) ENGINE = MyISAM,
    PARTITION p20 VALUES LESS THAN (2028) ENGINE = MyISAM,
    PARTITION p21 VALUES LESS THAN (2029) ENGINE = MyISAM,
    PARTITION p22 VALUES LESS THAN (2030) ENGINE = MyISAM,
    PARTITION p23 VALUES LESS THAN (2031) ENGINE = MyISAM,
    PARTITION p24 VALUES LESS THAN (2032) ENGINE = MyISAM,
    PARTITION p25 VALUES LESS THAN (2033) ENGINE = MyISAM,
    PARTITION p26 VALUES LESS THAN (2034) ENGINE = MyISAM,
    PARTITION p27 VALUES LESS THAN (2035) ENGINE = MyISAM,
    PARTITION p28 VALUES LESS THAN (2036) ENGINE = MyISAM,
    PARTITION p29 VALUES LESS THAN (2037) ENGINE = MyISAM,
    PARTITION p30 VALUES LESS THAN (2038) ENGINE = MyISAM,
    PARTITION p31 VALUES LESS THAN (2039) ENGINE = MyISAM,
    PARTITION p32 VALUES LESS THAN (2040) ENGINE = MyISAM,
    PARTITION p33 VALUES LESS THAN (2041) ENGINE = MyISAM,
    PARTITION p34 VALUES LESS THAN (2042) ENGINE = MyISAM,
    PARTITION p35 VALUES LESS THAN (2043) ENGINE = MyISAM,
    PARTITION p36 VALUES LESS THAN (2044) ENGINE = MyISAM,
    PARTITION p37 VALUES LESS THAN (2045) ENGINE = MyISAM,
    PARTITION p38 VALUES LESS THAN (2046) ENGINE = MyISAM,
    PARTITION p39 VALUES LESS THAN (2047) ENGINE = MyISAM,
    PARTITION p40 VALUES LESS THAN (2048) ENGINE = MyISAM,
    PARTITION p41 VALUES LESS THAN (2049) ENGINE = MyISAM,
    PARTITION p42 VALUES LESS THAN MAXVALUE ENGINE = MyISAM) */

Если я прав в mysqlпросто прокомментируйте мои инструкции по разделам.В конце концов я вставляю 3 142 157 значений в таблицу с 2007 по 2017 год, и когда я пытаюсь использовать команду «SELECT * FROM datosenfermedades PARTITION (p1)», я получаю следующую ошибку: 

    You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '(p1)
LIMIT 0, 25' at line 1

1 Ответ

0 голосов
/ 04 октября 2018

Почти нет причин использовать «выбор раздела».Вы должны позволить движку определить, какой раздел (или разделы) искать для удовлетворения запроса.

В наши дни вы должны отказаться от MyISAM и перейти к InnoDB.

int(3) - это 4-байтовое число.(3) ничего не значит.Посмотрите TINYINT.

Нет индексов в этой таблице?Используйте индексы для производительности, а не для разделения.

Если бы у вас было INDEX(fechaconsulta), это извлекло бы те же строки: 

SELECT * FROM 
    WHERE fechaconsulta >= '2009-01-01'
      AND fechaconsulta  < '2009-01-01' + INTERVAL 1 YEAR;

И это сделало бы это эффективно с разделением или без него.

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