属性 休眠。hbm2ddl.auto 未按预期工作 (MySQL 5.7)
Property hibernate.hbm2ddl.auto not working as expected (MySQL 5.7)
我想达到的目标：
写一点 class 在启动期间创建模式。如果架构存在，则应将其删除并重新创建。
我不得不说我是 Hibernate 的新手，所以错误很可能在我这边。
程序第一次运行良好，但第二次我得到一个异常（见下文）table 已经存在（这是真的，但我希望 Hibernate 删除然后重新创建它。
我的配置：
Hibernate 5.4.20，MySQL 5.7.9，MyISAM（InnoDB 上的结果相同），MS Windows 10（64 位）。
已经尝试了每个 MySQL方言，MYSQL5Dialect 和 MySQL57Dialect - 结果相同。
代码如下：
public class HibernateCreateRunner {
public static void main(String[] args) {
Map<String, String> settings = new HashMap<>();
settings.put("connection.driver_class", "com.mysql.jdbc.Driver");
//settings.put("hibernate.dialect", "org.hibernate.dialect.MySQL57Dialect");
settings.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
settings.put("hibernate.connection.url", "jdbc:mysql://localhost:3306/stats_test?serverTimezone=UTC");
settings.put("hibernate.connection.username", "root");
settings.put("hibernate.connection.password", "root");
settings.put("hibernate.hbm2ddl.auto", "create");
settings.put("show_sql", "true");
MetadataSources metadataSources = new MetadataSources(
new StandardServiceRegistryBuilder()
.applySettings(settings)
.build());
metadataSources.addAnnotatedClass(CaseAndResult.class);
metadataSources.addAnnotatedClass(CaseObject.class);
metadataSources.buildMetadata();
Metadata metadata = metadataSources.buildMetadata();;
SchemaExport schemaExport = new SchemaExport();
schemaExport.setHaltOnError(true)
.setFormat(true)
.setDelimiter(";")
.setOutputFile("db-schema.sql")
.createOnly(EnumSet.of(TargetType.DATABASE, TargetType.STDOUT), metadata);
}
}
这是我遇到的异常：
Exception in thread "main" org.hibernate.tool.schema.spi.SchemaManagementException: Halting on error : Error executing DDL "
create table CASEANDRESULT (
CASEID varchar(255) not null,
ASSESSMENTDATE datetime,
CARRESULTLEVELID integer,
CARRESULTLEVELNAME varchar(255),
CASEMODE varchar(255),
COMPLETE TINYINT,
LOCALE varchar(255),
NUMBEROFCHANGEASSESSCYCLES varchar(255),
NUMBEROFSOURCECHANGES integer,
PATCHNAME varchar(255),
POLICYCANBEISSUED TINYINT,
VERSIONNAME varchar(255),
primary key (CASEID)
) engine=MyISAM" via JDBC Statement
at org.hibernate.tool.schema.internal.ExceptionHandlerHaltImpl.handleException(ExceptionHandlerHaltImpl.java:27)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:443)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:423)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:314)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121)
at org.hibernate.tool.hbm2ddl.SchemaExport.doExecution(SchemaExport.java:296)
at org.hibernate.tool.hbm2ddl.SchemaExport.execute(SchemaExport.java:249)
at org.hibernate.tool.hbm2ddl.SchemaExport.execute(SchemaExport.java:228)
at org.hibernate.tool.hbm2ddl.SchemaExport.createOnly(SchemaExport.java:224)
at com.genre.star.database.HibernateCreateRunner.main(HibernateCreateRunner.java:46)
Caused by: org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "
create table CASEANDRESULT (
CASEID varchar(255) not null,
ASSESSMENTDATE datetime,
CARRESULTLEVELID integer,
CARRESULTLEVELNAME varchar(255),
CASEMODE varchar(255),
COMPLETE TINYINT,
LOCALE varchar(255),
NUMBEROFCHANGEASSESSCYCLES varchar(255),
NUMBEROFSOURCECHANGES integer,
PATCHNAME varchar(255),
POLICYCANBEISSUED TINYINT,
VERSIONNAME varchar(255),
primary key (CASEID)
) engine=MyISAM" via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:439)
... 10 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'caseandresult' already exists
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2617)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2778)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2819)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2768)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:894)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:732)
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54)
非常感谢任何提示！
您的代码遵循 Error Code: 1071. Specified key was too long; max key length is 1000 bytes
所以只使用以下长度
create table CASEANDRESULT8 (
CASEID varchar(250) not null,
ASSESSMENTDATE datetime,
CARRESULTLEVELID integer,
CARRESULTLEVELNAME varchar(255),
CASEMODE varchar(255),
COMPLETE TINYINT,
LOCALE varchar(255),
NUMBEROFCHANGEASSESSCYCLES varchar(255),
NUMBEROFSOURCECHANGES integer,
PATCHNAME varchar(255),
POLICYCANBEISSUED TINYINT,
VERSIONNAME varchar(255),
primary key (CASEID)
) engine=MyISAM
您正在调用仅创建架构的 createOnly，并且 table 已经存在
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'caseandresult' already exists
如果您想先删除架构，您应该调用 SchemaExport.execute 并执行操作 BOTH
我想达到的目标：
写一点 class 在启动期间创建模式。如果架构存在，则应将其删除并重新创建。
我不得不说我是 Hibernate 的新手，所以错误很可能在我这边。
程序第一次运行良好，但第二次我得到一个异常（见下文）table 已经存在（这是真的，但我希望 Hibernate 删除然后重新创建它。
我的配置：
Hibernate 5.4.20，MySQL 5.7.9，MyISAM（InnoDB 上的结果相同），MS Windows 10（64 位）。
已经尝试了每个 MySQL方言，MYSQL5Dialect 和 MySQL57Dialect - 结果相同。
代码如下：
public class HibernateCreateRunner {
public static void main(String[] args) {
Map<String, String> settings = new HashMap<>();
settings.put("connection.driver_class", "com.mysql.jdbc.Driver");
//settings.put("hibernate.dialect", "org.hibernate.dialect.MySQL57Dialect");
settings.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
settings.put("hibernate.connection.url", "jdbc:mysql://localhost:3306/stats_test?serverTimezone=UTC");
settings.put("hibernate.connection.username", "root");
settings.put("hibernate.connection.password", "root");
settings.put("hibernate.hbm2ddl.auto", "create");
settings.put("show_sql", "true");
MetadataSources metadataSources = new MetadataSources(
new StandardServiceRegistryBuilder()
.applySettings(settings)
.build());
metadataSources.addAnnotatedClass(CaseAndResult.class);
metadataSources.addAnnotatedClass(CaseObject.class);
metadataSources.buildMetadata();
Metadata metadata = metadataSources.buildMetadata();;
SchemaExport schemaExport = new SchemaExport();
schemaExport.setHaltOnError(true)
.setFormat(true)
.setDelimiter(";")
.setOutputFile("db-schema.sql")
.createOnly(EnumSet.of(TargetType.DATABASE, TargetType.STDOUT), metadata);
}
}
这是我遇到的异常：
Exception in thread "main" org.hibernate.tool.schema.spi.SchemaManagementException: Halting on error : Error executing DDL "
create table CASEANDRESULT (
CASEID varchar(255) not null,
ASSESSMENTDATE datetime,
CARRESULTLEVELID integer,
CARRESULTLEVELNAME varchar(255),
CASEMODE varchar(255),
COMPLETE TINYINT,
LOCALE varchar(255),
NUMBEROFCHANGEASSESSCYCLES varchar(255),
NUMBEROFSOURCECHANGES integer,
PATCHNAME varchar(255),
POLICYCANBEISSUED TINYINT,
VERSIONNAME varchar(255),
primary key (CASEID)
) engine=MyISAM" via JDBC Statement
at org.hibernate.tool.schema.internal.ExceptionHandlerHaltImpl.handleException(ExceptionHandlerHaltImpl.java:27)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:443)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:423)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:314)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121)
at org.hibernate.tool.hbm2ddl.SchemaExport.doExecution(SchemaExport.java:296)
at org.hibernate.tool.hbm2ddl.SchemaExport.execute(SchemaExport.java:249)
at org.hibernate.tool.hbm2ddl.SchemaExport.execute(SchemaExport.java:228)
at org.hibernate.tool.hbm2ddl.SchemaExport.createOnly(SchemaExport.java:224)
at com.genre.star.database.HibernateCreateRunner.main(HibernateCreateRunner.java:46)
Caused by: org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "
create table CASEANDRESULT (
CASEID varchar(255) not null,
ASSESSMENTDATE datetime,
CARRESULTLEVELID integer,
CARRESULTLEVELNAME varchar(255),
CASEMODE varchar(255),
COMPLETE TINYINT,
LOCALE varchar(255),
NUMBEROFCHANGEASSESSCYCLES varchar(255),
NUMBEROFSOURCECHANGES integer,
PATCHNAME varchar(255),
POLICYCANBEISSUED TINYINT,
VERSIONNAME varchar(255),
primary key (CASEID)
) engine=MyISAM" via JDBC Statement
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67)
at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:439)
... 10 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'caseandresult' already exists
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2617)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2778)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2819)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2768)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:894)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:732)
at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:54)
非常感谢任何提示！
您的代码遵循 Error Code: 1071. Specified key was too long; max key length is 1000 bytes
所以只使用以下长度
create table CASEANDRESULT8 (
CASEID varchar(250) not null,
ASSESSMENTDATE datetime,
CARRESULTLEVELID integer,
CARRESULTLEVELNAME varchar(255),
CASEMODE varchar(255),
COMPLETE TINYINT,
LOCALE varchar(255),
NUMBEROFCHANGEASSESSCYCLES varchar(255),
NUMBEROFSOURCECHANGES integer,
PATCHNAME varchar(255),
POLICYCANBEISSUED TINYINT,
VERSIONNAME varchar(255),
primary key (CASEID)
) engine=MyISAM
您正在调用仅创建架构的 createOnly，并且 table 已经存在
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'caseandresult' already exists
如果您想先删除架构，您应该调用 SchemaExport.execute 并执行操作 BOTH