如何创建具有飞行路线的数据库？
2022-09-01 05:08:52
问题：是否可以在迁移脚本中创建新数据库，然后连接到该数据库？如何？
我的场景：我试图在我的Java项目中使用flyway（使用Jersey2.4 + tomcat 7 + PostgreSQL 9.3.1 + EclipseLink的RESTful应用程序）来管理使用git的不同开发人员之间的更改。我写了我的初始化脚本，并运行它：
PGPASSWORD='123456' psql -U postgres -f migration/V1__initDB.sql
它工作正常。问题是我无法使用脚本创建新数据库。当我在脚本中包含以下行时：
CREATE DATABASE my_database OWNER postgres ENCODING 'UTF8';
我收到此错误：
org.postgresql.util.PSQLException: ERROR: CREATE DATABASE cannot run inside a transaction block
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2157)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1886)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:555)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:403)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:395)
at com.googlecode.flyway.core.dbsupport.JdbcTemplate.executeStatement(JdbcTemplate.java:230)
at com.googlecode.flyway.core.dbsupport.SqlScript.execute(SqlScript.java:89)
at com.googlecode.flyway.core.resolver.sql.SqlMigrationExecutor.execute(SqlMigrationExecutor.java:72)
at com.googlecode.flyway.core.command.DbMigrate$2.doInTransaction(DbMigrate.java:252)
at com.googlecode.flyway.core.command.DbMigrate$2.doInTransaction(DbMigrate.java:250)
at com.googlecode.flyway.core.util.jdbc.TransactionTemplate.execute(TransactionTemplate.java:56)
at com.googlecode.flyway.core.command.DbMigrate.applyMigration(DbMigrate.java:250)
at com.googlecode.flyway.core.command.DbMigrate.access$700(DbMigrate.java:47)
at com.googlecode.flyway.core.command.DbMigrate$1.doInTransaction(DbMigrate.java:189)
at com.googlecode.flyway.core.command.DbMigrate$1.doInTransaction(DbMigrate.java:138)
at com.googlecode.flyway.core.util.jdbc.TransactionTemplate.execute(TransactionTemplate.java:56)
at com.googlecode.flyway.core.command.DbMigrate.migrate(DbMigrate.java:137)
at com.googlecode.flyway.core.Flyway$1.execute(Flyway.java:872)
at com.googlecode.flyway.core.Flyway$1.execute(Flyway.java:819)
at com.googlecode.flyway.core.Flyway.execute(Flyway.java:1200)
at com.googlecode.flyway.core.Flyway.migrate(Flyway.java:819)
at ir.chom.MyApp.<init>(MyApp.java:28)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at org.glassfish.hk2.utilities.reflection.ReflectionHelper.makeMe(ReflectionHelper.java:1117)
at org.jvnet.hk2.internal.Utilities.justCreate(Utilities.java:867)
at org.jvnet.hk2.internal.ServiceLocatorImpl.create(ServiceLocatorImpl.java:814)
at org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:906)
at org.jvnet.hk2.internal.ServiceLocatorImpl.createAndInitialize(ServiceLocatorImpl.java:898)
at org.glassfish.jersey.server.ApplicationHandler.createApplication(ApplicationHandler.java:300)
at org.glassfish.jersey.server.ApplicationHandler.<init>(ApplicationHandler.java:279)
at org.glassfish.jersey.servlet.WebComponent.<init>(WebComponent.java:302)
at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:167)
at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:349)
at javax.servlet.GenericServlet.init(GenericServlet.java:160)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1091)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5176)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5460)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3954)
at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:426)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1345)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1530)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1540)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1540)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1519)
at java.lang.Thread.run(Thread.java:724)
这似乎是使用选项的JDBC的问题。可以使用如下方式禁用此选项：autocommit
Connection connection = dataSource.getConnection();
Connection.setAutoCommit(false); // Disables auto-commit.
但我不知道如何将此选项传递给飞行方式连接。另外，如果我解决这个问题，我认为我将有将密码传递给命令的问题。\c
