using foreach to do batch insert with mybatis

Question

I am using mybatis and i would like to insert an ArrayList to some table.
all right using foreach in mapper, well this ends up with oracle exception ORA_00933 .
this is the mybatis mapper:

<insert id="batchInsert" parameterType="java.util.List">
		insert into SYS_ROLES_PERMISSIONGROUP
		(role_id, permissiongroup_id)
		values
		<foreach collection="list" item="model" index="index" separator=","> 
        (#{model.role_id}, #{model.permissiongroup_id})
    	</foreach>
	</insert>

org.springframework.jdbc.BadSqlGrammarException: 
### Error updating database.  Cause: java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束

### The error may involve com.gaotime.platform.system.mapper.RolePermissiongroupMapper.batchInsert-Inline
### The error occurred while setting parameters
### SQL: insert into SYS_ROLES_PERMISSIONGROUP   (role_id, permissiongroup_id)   values               (?, ?)      ,           (?, ?)      ,           (?, ?)
### Cause: java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束

; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束

	at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:95)
	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80)
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:71)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:364)
	at com.sun.proxy.$Proxy5.insert(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:236)
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:51)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
	at com.sun.proxy.$Proxy15.batchInsert(Unknown Source)
	at com.gaotime.platform.system.service.RolePermissiongroupService.batchInsert(RolePermissiongroupService.java:18)
	at com.gaotime.platform.system.action.RolePermissiongroupAction.execute(RolePermissiongroupAction.java:54)
	at com.gaotime.platform.handler.MqMessageHandler.handle(MqMessageHandler.java:20)
	at unitask.ums.activemq.HandlerThread.run(HandlerThread.java:51)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束

	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439)
	at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395)
	at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:802)
	at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:436)
	at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186)
	at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:521)
	at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:205)
	at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:1008)
	at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1307)
	at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3449)
	at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3550)
	at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1374)
	at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.execute(NewProxyPreparedStatement.java:989)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:62)
	at com.sun.proxy.$Proxy27.execute(Unknown Source)
	at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:44)
	at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:69)
	at org.apache.ibatis.executor.ReuseExecutor.doUpdate(ReuseExecutor.java:50)
	at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:105)
	at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:71)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:152)
	at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:141)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:354)

Please help me out, thanks

one more mapper configuration

<insert id="batchInsert" parameterType="java.util.List">
	    <foreach collection="list" item="model" index="index" separator=","> 
		insert into SYS_ROLES_PERMISSIONGROUP
		(role_id, permissiongroup_id)
		values
		
        (#{model.role_id}, #{model.permissiongroup_id})
    	</foreach>
	</insert>

I got this message

org.springframework.jdbc.BadSqlGrammarException: 
### Error updating database.  Cause: java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束

### The error may involve com.gaotime.platform.system.mapper.RolePermissiongroupMapper.batchInsert-Inline
### The error occurred while setting parameters
### SQL: insert into SYS_ROLES_PERMISSIONGROUP   (role_id, permissiongroup_id)   values            (?, ?)       ,     insert into SYS_ROLES_PERMISSIONGROUP   (role_id, permissiongroup_id)   values            (?, ?)       ,     insert into SYS_ROLES_PERMISSIONGROUP   (role_id, permissiongroup_id)   values            (?, ?)
### Cause: java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束

; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: ORA-00933: SQL 命令未正确结束

here is the static insert statement

<insert id="batchInsert" parameterType="java.util.List">
	    <!-- <foreach collection="list" item="model" index="index" separator=";"> 
		insert into SYS_ROLES_PERMISSIONGROUP
		(role_id, permissiongroup_id)
		values
		
        (#{model.role_id,jdbcType=NUMERIC}, #{model.permissiongroup_id,jdbcType=NUMERIC})
    	</foreach> -->
    	insert into SYS_ROLES_PERMISSIONGROUP
		(role_id, permissiongroup_id)
		values(5,5);
		insert into SYS_ROLES_PERMISSIONGROUP
		(role_id, permissiongroup_id)
		values(6,6)
	</insert>

and the exception

19:00:21,531 DEBUG Thread-11 RolePermissiongroupMapper.batchInsert:139 - ==>  Preparing: insert into SYS_ROLES_PERMISSIONGROUP (role_id, permissiongroup_id) values(5,5); insert into SYS_ROLES_PERMISSIONGROUP (role_id, permissiongroup_id) values(6,6) 
19:00:21,535 DEBUG Thread-11 RolePermissiongroupMapper.batchInsert:139 - ==> Parameters: 
19:00:21,553 DEBUG Thread-11 impl.NewPooledConnection:430 - com.mchange.v2.c3p0.impl.NewPooledConnection@699238ad handling a throwable.
java.sql.SQLSyntaxErrorException: ORA-00911: 无效字符

For update, I still need help. Come over google group

Answer 1

Insert inside Mybatis foreach is not batch, this is a single (could become giant) SQL statement and that brings drawbacks:

• some database such as Oracle here does not support.
• in relevant cases: there will be a large number of records to insert and the database configured limit (by default around 2000 parameters per statement) will be hit, and eventually possibly DB stack error if the statement itself become too large.

Iteration over the collection must not be done in the mybatis XML. Just execute a simple Insert statement in a Java Foreach loop. The most important thing is the session Executor type.

SqlSession session = sessionFactory.openSession(ExecutorType.BATCH);
for (Model model : list) {
    session.insert("insertStatement", model);
}
session.flushStatements();

I event think that here it will be enough to use ExecutorType.REUSE without flushing statements.

Unlike default ExecutorType.SIMPLE, the statement will be prepared once and executed for each record to insert.