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* split up select.md * array-join.md basic refactoring * distinct.md basic refactoring * format.md basic refactoring * from.md basic refactoring * group-by.md basic refactoring * having.md basic refactoring * additional index.md refactoring * into-outfile.md basic refactoring * join.md basic refactoring * limit.md basic refactoring * limit-by.md basic refactoring * order-by.md basic refactoring * prewhere.md basic refactoring * adjust operators/index.md links * adjust sample.md links * adjust more links * adjust operatots links * fix some links * adjust aggregate function article titles * basic refactor of remaining select clauses * absolute paths in make_links.sh * run make_links.sh * remove old select.md locations * translate docs/es * translate docs/fr * translate docs/fa * remove old operators.md location * change operators.md links * adjust links in docs/es * adjust links in docs/es * minor texts adjustments * wip * update machine translations to use new links * fix changelog * es build fixes * get rid of some select.md links * temporary adjust ru links * temporary adjust more ru links * improve curly brace handling * adjust ru as well * fa build fix * ru link fixes * zh link fixes * temporary disable part of anchor checks
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machine_translated | machine_translated_rev | toc_priority | toc_title |
---|---|---|---|
true | 72537a2d52 |
30 | MySQL |
MySQL
で接続するデータベースのリモートMySQLサーバを実行 INSERT
と SELECT
ClickHouseとMySQLの間でデータを交換するためのクエリ。
その MySQL
データベースエンジ SHOW TABLES
または SHOW CREATE TABLE
.
次のクエリは実行できません:
RENAME
CREATE TABLE
ALTER
データベースの作成
CREATE DATABASE [IF NOT EXISTS] db_name [ON CLUSTER cluster]
ENGINE = MySQL('host:port', ['database' | database], 'user', 'password')
エンジン変数
host:port
— MySQL server address.database
— Remote database name.user
— MySQL user.password
— User password.
データ型のサポート
MySQL | クリックハウス |
---|---|
UNSIGNED TINYINT | UInt8 |
TINYINT | Int8 |
UNSIGNED SMALLINT | UInt16 |
SMALLINT | Int16 |
UNSIGNED INT, UNSIGNED MEDIUMINT | UInt32 |
INT, MEDIUMINT | Int32 |
UNSIGNED BIGINT | UInt64 |
BIGINT | Int64 |
FLOAT | Float32 |
DOUBLE | Float64 |
DATE | 日付 |
DATETIME, TIMESTAMP | DateTime |
BINARY | FixedString |
他のすべてのMySQLデータ型に変換され 文字列.
Null可能 サポートされます。
使用例
MySQLのテーブル:
mysql> USE test;
Database changed
mysql> CREATE TABLE `mysql_table` (
-> `int_id` INT NOT NULL AUTO_INCREMENT,
-> `float` FLOAT NOT NULL,
-> PRIMARY KEY (`int_id`));
Query OK, 0 rows affected (0,09 sec)
mysql> insert into mysql_table (`int_id`, `float`) VALUES (1,2);
Query OK, 1 row affected (0,00 sec)
mysql> select * from mysql_table;
+------+-----+
| int_id | value |
+------+-----+
| 1 | 2 |
+------+-----+
1 row in set (0,00 sec)
ClickHouseのデータベース、MySQLサーバとのデータ交換:
CREATE DATABASE mysql_db ENGINE = MySQL('localhost:3306', 'test', 'my_user', 'user_password')
SHOW DATABASES
┌─name─────┐
│ default │
│ mysql_db │
│ system │
└──────────┘
SHOW TABLES FROM mysql_db
┌─name─────────┐
│ mysql_table │
└──────────────┘
SELECT * FROM mysql_db.mysql_table
┌─int_id─┬─value─┐
│ 1 │ 2 │
└────────┴───────┘
INSERT INTO mysql_db.mysql_table VALUES (3,4)
SELECT * FROM mysql_db.mysql_table
┌─int_id─┬─value─┐
│ 1 │ 2 │
│ 3 │ 4 │
└────────┴───────┘