Spring Batch Framework - Auto create Batch Table

问题

I just created a batch job using Spring Batch framework, but I don't have Database privileges to run CREATE SQL. When I try to run the batch job I hit the error while the framework tried to create TABLE_BATCH_INSTANCE. I try to disable the

<jdbc:initialize-database data-source="dataSource" enabled="false">    
 ...
</jdbc:initialize-database>

But after I tried I still hit the error

org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [SELECT JOB_INSTANCE_ID, JOB_NAME from BATCH_JOB_INSTANCE where JOB_NAME = ? and JOB_KEY = ?]; nested exception is java.sql.SQLSyntaxErrorException: ORA-00942: table or view does not exist

Anyway can disable the SQL, I just want to test my reader writer and processor work properly.

回答1:

Spring Batch uses the database to save metadata for its recover/retry functionality.

If you can't create tables in the database then you have to disable this behaviour

If you can create the batch metadata tables but not in runtime then you might create them manually

回答2:

With Spring Boot 2.0 you probably need this: https://docs.spring.io/spring-boot/docs/2.0.0.M7/reference/htmlsingle/#howto-initialize-a-spring-batch-database

spring.batch.initialize-schema=always

By default it will only create the tables if you are using an embedded database.

Or

 spring.batch.initialize-schema=never

To permanently disable it.

回答3:

To enable auto create spring batch data-schema simply add this line to your spring application.properties file :

spring.batch.initialize-schema=always

To understand more about Spring batch meta-data schema :

https://docs.spring.io/spring-batch/trunk/reference/html/metaDataSchema.html

回答4:

Seems silly, but someone can have the same problem.

I was receiving this error after drop all tables from a database. When I tried to start the Spring Batch, I received the error:

bad SQL grammar [SELECT JOB_INSTANCE_ID, JOB_NAME from BATCH_JOB_INSTANCE where JOB_NAME = ? and JOB_KEY = ?]

and:

Invalid object name 'BATCH_JOB_INSTANCE'

This happened to me because I drop the tables without restart the service. The service was started and receive the database metadata with the Batch tables on the database. After drop them and not restart the server, the Spring Batch thought that the tables still exists.

After restart the Spring Batch server and execute the batch again, the tables were created without error.

回答5:

When running with Spring Boot:

Running with Spring Boot v1.5.14.RELEASE, Spring v4.3.18.RELEASE

This should be enough:

spring:
    batch:
        initializer:
            enabled: false

The initialize-schema did not work for this Spring boot version. After that I was able to copy the SQL scripts from the spring-core jar and change the table capitalization since this was my issue with the automatic table creation under Windows/Mac/Linux.

回答6:

<jdbc:initialize-database/> tag is parsed by Spring using InitializeDatabaseBeanDefinitionParser. You can try debugging this class in your IDE to make sure what values are being picked up for enabled attribute. Also this value can be disabled by using JVM parameter -Dspring.batch.initializer.enabled=false

回答7:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/jdbc 
        http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd">


    <!-- database -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/springbatch" />
        <property name="username" value="root" />
        <property name="password" value="" />
    </bean>

    <!-- transaction manager -->
    <bean id="transactionManager" class="org.springframework.batch.support.transaction.ResourcelessTransactionManager" />

    <!-- create job-meta tables automatically -->
    <jdbc:initialize-database data-source="dataSource">
        <jdbc:script location="org/springframework/batch/core/schema-drop-mysql.sql" />
        <jdbc:script location="org/springframework/batch/core/schema-mysql.sql" />
    </jdbc:initialize-database>
</beans>

And make sure you are using compatible spring-jdbc -version with spring-batch. Most probably spring-jdbc-3.2.2.RELEASE.JAR compatible.

回答8:

this works for me: Spring boot 2.0

  batch:
        initialize-schema: never
        initializer:
            enabled: false

来源：https://stackoverflow.com/questions/33249942/spring-batch-framework-auto-create-batch-table