into inseparable words, and then the syntactic parser will analyze SQL and extract the parsing context, which can include tables, options, ordering items, grouping items, aggregation functions, pagination SQL Route It is the sharding strategy that matches users’configurations according to the parsing context and the route path can be generated. It supports sharding route and broadcast route currently. traversing the abstract syntax tree, the context needed by sharding is extracted and the place that may need to be rewritten is also marked out. Parsing context for the use of sharding includes select

can connect to any database that implements JDBC specifications. • Zero Business Intrusion In response to database switchover scenarios, ShardingSphere can achieve smooth business migration without limit function is used to block traffic from compute nodes to the storage node, to ensure normal response of the storage node cluster. 3.6.5 Core Concept Circuit Breaker Fuse connection between Apache parsing, routing, rewriting, execution, and result merging before it is finally executed and the response can be output. If a SQL statement is complex and the overall execution takes a long time, how do

transaction id', `xid` VARCHAR(100) NOT NULL COMMENT 'global transaction id', `context` VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` LONGBLOB NOT NULL COMMENT 'rollback org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:shardingsph org/schema/beans/spring- beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring- context.xsd http://www.springframework.org/schema/tx http://www.springframework

What is ShardingSphere 2 Apache ShardingSphere document, v5.2.1 • Zero Business Intrusion In response to database switchover scenarios, ShardingSphere can achieve smooth business migration without limit function is used to block traffic from compute nodes to the storage node, to ensure normal response of the storage node cluster. 3.6.5 Core Concept Circuit Breaker Fuse connection between Apache parsing, routing, rewriting, execution, and result merging before it is finally executed and the response can be output. If a SQL statement is complex and the overall execution takes a long time, how do

transaction id', `xid` VARCHAR(100) NOT NULL COMMENT 'global transaction id', `context` VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` LONGBLOB NOT NULL COMMENT 'rollback API for auto mode Preview current sharding rule Example: preview select count(1) from t_order; Response: mysql> preview select count(1) from t_order; +------------------+--------------------------------+ List scaling jobs Please refer to RAL#Scaling for more details. Example: show scaling list; Response: 5.4. ShardingSphere-Scaling 219 Apache ShardingSphere document, v5.1.1 mysql> show scaling list;

transaction id', `xid` VARCHAR(100) NOT NULL COMMENT 'global transaction id', `context` VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` LONGBLOB NOT NULL COMMENT 'rollback API for auto mode Preview current sharding rule Example: preview SELECT COUNT(1) FROM t_order; Response: mysql> preview SELECT COUNT(1) FROM t_order; +------------------+--------------------------- List scaling jobs Please refer to RAL#Scaling for more details. Example: show scaling list; Response: mysql> show scaling list; +--------------------+-----------------------+----------------------+--------+-----

can connect to any database that implements JDBC specifications. • Zero Business Intrusion In response to database switchover scenarios, ShardingSphere can achieve smooth business migration without limit function is used to block traffic from compute nodes to the storage node, to ensure normal response of the storage node cluster. 8.5.5 Core Concept Circuit Breaker Fuse connection between Apache parsing, routing, rewriting, execution, and result merging before it is finally executed and the response can be output. If a SQL statement is complex and the overall execution takes a long time, how do

can connect to any database that implements JDBC specifications. • Zero Business Intrusion In response to database switchover scenarios, ShardingSphere can achieve smooth business migration without limit function is used to block traffic from compute nodes to the storage node, to ensure normal response of the storage node cluster. 8.5.5 Core Concept Circuit Breaker Fuse connection between Apache parsing, routing, rewriting, execution, and result merging before it is finally executed and the response can be output. If a SQL statement is complex and the overall execution takes a long time, how do

<context id="DB2Tables" targetRuntime="MyBatis3"> context> 3) 运行代码生成器生成代码 @Test public void testMBG() throws Exception { List <context-param> contextConfigLocation classpath:applicationContext.xml context-param> org

public class MyJob implements SimpleJob { @Override public void execute(ShardingContext context) { switch (context.getShardingItem()) { case 0: // do something by sharding item 0 break; case 1: // class MyElasticJob implements SimpleJob { @Override public void execute(ShardingContext context) { switch (context.getShardingItem()) { case 0: // do something by sharding item 0 break; case 1: // MyElasticJob implements DataflowJob { @Override public List fetchData(ShardingContext context) { switch (context.getShardingItem()) { case 0: List data = // get data from database by sharding item