(Vii) mybatis bulk operations

First use is very simple:

SqlSession sqlSession = sessionFactory.openSession(ExecutorType.BATCH);

Bulk Operations Core: change the way of implementation of sql instead BATCH

So what is it?

First, the normal way is to insert a piece of data, you build a sql statement and pass parameters, perform sql, but BATCH mode, pre-compiled once, we will frame sql statement to build a good, time after each execution, just give filled it, you do not need to build a sql statement again.

The console log output can also look out:

This is the way of insertion of the BATCH batch:

 

EBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - Committing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@52851b44]
DEBUG [main] - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@52851b44]
DEBUG [main] - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@52851b44]
DEBUG [main] - Returned connection 1384454980 to pool.

Process finished with exit code 0

 

This is not to use BATCH

EBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - ==>  Preparing: insert into student ( name, loves ) values ( ?, ? ) 
DEBUG [main] - ==> Parameters: 温鸿飞(String), dsadsa(String)
DEBUG [main] - <==    Updates: 1
DEBUG [main] - Committing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@1852a3ff]
DEBUG [main] - Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@1852a3ff]
DEBUG [main] - Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@1852a3ff]
DEBUG [main] - Returned connection 408069119 to pool.

Process finished with exit code 0

We can see precompiled many times.