Spring SQL 语句中的引导休眠语法错误
Spring Boot Hibernate Syntax Error in SQL Statement
我修改了 Spring Boot JPA 数据示例 (https://github.com/spring-guides/gs-accessing-data-jpa.git)，稍微添加了一个 Order 实体和一个来自客户的对应的一对多映射。当我 运行 示例时，Hibernate 记录的 SQL 语句行中有几个语法错误。我想弄清楚为什么？我在下面粘贴了实体代码和应用程序的控制台输出。
package hello;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
@Entity
public class Customer {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;
private String firstName;
private String lastName;
@OneToMany(mappedBy="customer")
private List<Order> orders;
protected Customer() {}
public Customer(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
@Override
public String toString() {
return String.format(
"Customer[id=%d, firstName='%s', lastName='%s']",
id, firstName, lastName);
}
}
以及相应的订单实体：
package hello;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
@Entity
public class Order {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;
protected Order() {}
double amount;
@ManyToOne
Customer customer;
}
控制台输出：
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.1.10.RELEASE)
2015-01-16 08:56:53.116 INFO 27810 --- [ main] hello.Application : Starting Application on MKI with PID 27810 (/home/ole/Documents/workspace-sts-3.6.3.RELEASE/gs-accessing-data-jpa-complete/target/classes started by ole in /home/ole/Documents/workspace-sts-3.6.3.RELEASE/gs-accessing-data-jpa-complete)
2015-01-16 08:56:53.149 INFO 27810 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@5d59e6f1: startup date [Fri Jan 16 08:56:53 CST 2015]; root of context hierarchy
2015-01-16 08:56:54.253 INFO 27810 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2015-01-16 08:56:54.269 INFO 27810 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2015-01-16 08:56:54.320 INFO 27810 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {4.3.7.Final}
2015-01-16 08:56:54.322 INFO 27810 --- [ main] org.hibernate.cfg.Environment : HHH000205: Loaded properties from resource hibernate.properties: {hibernate.connection.charSet=UTF-8, hibernate.dialect=org.hibernate.dialect.H2Dialect, hibernate.show_sql=true, hibernate.export.schema.delimiter=;, hibernate.bytecode.use_reflection_optimizer=false, hibernate.ejb.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy}
2015-01-16 08:56:54.322 INFO 27810 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2015-01-16 08:56:54.462 INFO 27810 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
2015-01-16 08:56:54.499 INFO 27810 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2015-01-16 08:56:54.591 INFO 27810 --- [ main] o.h.h.i.ast.ASTQueryTranslatorFactory : HHH000397: Using ASTQueryTranslatorFactory
2015-01-16 08:56:54.751 INFO 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
Hibernate: alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists
2015-01-16 08:56:54.752 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists
2015-01-16 08:56:54.753 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "ALTER TABLE ORDER[*] DROP CONSTRAINT FK_M6Q2OFKJ1G5AOBTB2P00AJPQG IF EXISTS "; expected "identifier"; SQL statement:
alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists [42001-176]
Hibernate: drop table customer if exists
Hibernate: drop table order if exists
2015-01-16 08:56:54.753 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: drop table order if exists
2015-01-16 08:56:54.753 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "DROP TABLE ORDER[*] IF EXISTS "; expected "identifier"; SQL statement:
drop table order if exists [42001-176]
Hibernate: create table customer (id bigint generated by default as identity, first_name varchar(255), last_name varchar(255), primary key (id))
Hibernate: create table order (id bigint generated by default as identity, amount double not null, customer_id bigint, primary key (id))
2015-01-16 08:56:54.756 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: create table order (id bigint generated by default as identity, amount double not null, customer_id bigint, primary key (id))
2015-01-16 08:56:54.756 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "CREATE TABLE ORDER[*] (ID BIGINT GENERATED BY DEFAULT AS IDENTITY, AMOUNT DOUBLE NOT NULL, CUSTOMER_ID BIGINT, PRIMARY KEY (ID)) "; expected "identifier"; SQL statement:
create table order (id bigint generated by default as identity, amount double not null, customer_id bigint, primary key (id)) [42001-176]
Hibernate: alter table order add constraint FK_m6q2ofkj1g5aobtb2p00ajpqg foreign key (customer_id) references customer
2015-01-16 08:56:54.757 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: alter table order add constraint FK_m6q2ofkj1g5aobtb2p00ajpqg foreign key (customer_id) references customer
2015-01-16 08:56:54.757 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "ALTER TABLE ORDER[*] ADD CONSTRAINT FK_M6Q2OFKJ1G5AOBTB2P00AJPQG FOREIGN KEY (CUSTOMER_ID) REFERENCES CUSTOMER "; expected "identifier"; SQL statement:
alter table order add constraint FK_m6q2ofkj1g5aobtb2p00ajpqg foreign key (customer_id) references customer [42001-176]
2015-01-16 08:56:54.757 INFO 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
2015-01-16 08:56:55.085 INFO 27810 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2015-01-16 08:56:55.102 INFO 27810 --- [ main] hello.Application : Started Application in 2.286 seconds (JVM running for 2.604)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: select customer0_.id as id1_0_, customer0_.first_name as first_na2_0_, customer0_.last_name as last_nam3_0_ from customer customer0_
Customers found with findAll():
-------------------------------
Customer[id=1, firstName='Jack', lastName='Bauer']
Customer[id=2, firstName='Chloe', lastName='O'Brian']
Customer[id=3, firstName='Kim', lastName='Bauer']
Customer[id=4, firstName='David', lastName='Palmer']
Customer[id=5, firstName='Michelle', lastName='Dessler']
Hibernate: select customer0_.id as id1_0_0_, customer0_.first_name as first_na2_0_0_, customer0_.last_name as last_nam3_0_0_ from customer customer0_ where customer0_.id=?
Customer found with findOne(1L):
--------------------------------
Customer[id=1, firstName='Jack', lastName='Bauer']
Hibernate: select customer0_.id as id1_0_, customer0_.first_name as first_na2_0_, customer0_.last_name as last_nam3_0_ from customer customer0_ where customer0_.last_name=?
Customer found with findByLastName('Bauer'):
--------------------------------------------
Customer[id=1, firstName='Jack', lastName='Bauer']
Customer[id=3, firstName='Kim', lastName='Bauer']
Hibernate: select customer0_.id as id1_0_, customer0_.first_name as first_na2_0_, customer0_.last_name as last_nam3_0_ from customer customer0_
Hibernate: delete from customer where id=?
Hibernate: delete from customer where id=?
Hibernate: delete from customer where id=?
Hibernate: delete from customer where id=?
Hibernate: delete from customer where id=?
2015-01-16 08:56:55.258 INFO 27810 --- [ main] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@5d59e6f1: startup date [Fri Jan 16 08:56:53 CST 2015]; root of context hierarchy
2015-01-16 08:56:55.259 INFO 27810 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
2015-01-16 08:56:55.260 INFO 27810 --- [ main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2015-01-16 08:56:55.261 INFO 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
Hibernate: alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists
2015-01-16 08:56:55.261 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists
2015-01-16 08:56:55.261 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "ALTER TABLE ORDER[*] DROP CONSTRAINT FK_M6Q2OFKJ1G5AOBTB2P00AJPQG IF EXISTS "; expected "identifier"; SQL statement:
alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists [42001-176]
Hibernate: drop table customer if exists
Hibernate: drop table order if exists
2015-01-16 08:56:55.263 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: drop table order if exists
2015-01-16 08:56:55.263 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "DROP TABLE ORDER[*] IF EXISTS "; expected "identifier"; SQL statement:
drop table order if exists [42001-176]
2015-01-16 08:56:55.263 INFO 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
想法？
TIA，
- 奥莱
请尝试更改您的 Order 实体：
package hello;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name = "order_table")
public class Order {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;
protected Order() {}
double amount;
@ManyToOne
Customer customer;
}
解释：
注意 @Table 注释。使用此注释，我将 table 名称指定为 order_table。在您的情况下，hibernate 默认尝试生成 table order。 ORDER 是任何 sql 中的服务词。出现异常是因为 hibernate 正在为 order table 生成 *** 语句，但数据库需要 table 名称而不是服务字 order。
我在 Order 实体中遇到了完全相同的问题，解决了显式定义 table 名称。
@Entity
@Table(name = "order_table")
class Order(
@Id
@GeneratedValue(generator = "system-uuid")
@GenericGenerator(name = "system-uuid", strategy = "uuid2")
val orderId: String,
val customerId: String,
...
)
我对名为 order 的列有同样的问题，但我无法更改它。在列注释中添加反引号解决了它。
@Column(name = "`ORDER`")
val order: String
我修改了 Spring Boot JPA 数据示例 (https://github.com/spring-guides/gs-accessing-data-jpa.git)，稍微添加了一个 Order 实体和一个来自客户的对应的一对多映射。当我 运行 示例时，Hibernate 记录的 SQL 语句行中有几个语法错误。我想弄清楚为什么？我在下面粘贴了实体代码和应用程序的控制台输出。
package hello;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
@Entity
public class Customer {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;
private String firstName;
private String lastName;
@OneToMany(mappedBy="customer")
private List<Order> orders;
protected Customer() {}
public Customer(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
@Override
public String toString() {
return String.format(
"Customer[id=%d, firstName='%s', lastName='%s']",
id, firstName, lastName);
}
}
以及相应的订单实体：
package hello;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
@Entity
public class Order {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;
protected Order() {}
double amount;
@ManyToOne
Customer customer;
}
控制台输出：
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.1.10.RELEASE)
2015-01-16 08:56:53.116 INFO 27810 --- [ main] hello.Application : Starting Application on MKI with PID 27810 (/home/ole/Documents/workspace-sts-3.6.3.RELEASE/gs-accessing-data-jpa-complete/target/classes started by ole in /home/ole/Documents/workspace-sts-3.6.3.RELEASE/gs-accessing-data-jpa-complete)
2015-01-16 08:56:53.149 INFO 27810 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@5d59e6f1: startup date [Fri Jan 16 08:56:53 CST 2015]; root of context hierarchy
2015-01-16 08:56:54.253 INFO 27810 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2015-01-16 08:56:54.269 INFO 27810 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2015-01-16 08:56:54.320 INFO 27810 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {4.3.7.Final}
2015-01-16 08:56:54.322 INFO 27810 --- [ main] org.hibernate.cfg.Environment : HHH000205: Loaded properties from resource hibernate.properties: {hibernate.connection.charSet=UTF-8, hibernate.dialect=org.hibernate.dialect.H2Dialect, hibernate.show_sql=true, hibernate.export.schema.delimiter=;, hibernate.bytecode.use_reflection_optimizer=false, hibernate.ejb.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy}
2015-01-16 08:56:54.322 INFO 27810 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2015-01-16 08:56:54.462 INFO 27810 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
2015-01-16 08:56:54.499 INFO 27810 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2015-01-16 08:56:54.591 INFO 27810 --- [ main] o.h.h.i.ast.ASTQueryTranslatorFactory : HHH000397: Using ASTQueryTranslatorFactory
2015-01-16 08:56:54.751 INFO 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
Hibernate: alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists
2015-01-16 08:56:54.752 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists
2015-01-16 08:56:54.753 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "ALTER TABLE ORDER[*] DROP CONSTRAINT FK_M6Q2OFKJ1G5AOBTB2P00AJPQG IF EXISTS "; expected "identifier"; SQL statement:
alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists [42001-176]
Hibernate: drop table customer if exists
Hibernate: drop table order if exists
2015-01-16 08:56:54.753 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: drop table order if exists
2015-01-16 08:56:54.753 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "DROP TABLE ORDER[*] IF EXISTS "; expected "identifier"; SQL statement:
drop table order if exists [42001-176]
Hibernate: create table customer (id bigint generated by default as identity, first_name varchar(255), last_name varchar(255), primary key (id))
Hibernate: create table order (id bigint generated by default as identity, amount double not null, customer_id bigint, primary key (id))
2015-01-16 08:56:54.756 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: create table order (id bigint generated by default as identity, amount double not null, customer_id bigint, primary key (id))
2015-01-16 08:56:54.756 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "CREATE TABLE ORDER[*] (ID BIGINT GENERATED BY DEFAULT AS IDENTITY, AMOUNT DOUBLE NOT NULL, CUSTOMER_ID BIGINT, PRIMARY KEY (ID)) "; expected "identifier"; SQL statement:
create table order (id bigint generated by default as identity, amount double not null, customer_id bigint, primary key (id)) [42001-176]
Hibernate: alter table order add constraint FK_m6q2ofkj1g5aobtb2p00ajpqg foreign key (customer_id) references customer
2015-01-16 08:56:54.757 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: alter table order add constraint FK_m6q2ofkj1g5aobtb2p00ajpqg foreign key (customer_id) references customer
2015-01-16 08:56:54.757 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "ALTER TABLE ORDER[*] ADD CONSTRAINT FK_M6Q2OFKJ1G5AOBTB2P00AJPQG FOREIGN KEY (CUSTOMER_ID) REFERENCES CUSTOMER "; expected "identifier"; SQL statement:
alter table order add constraint FK_m6q2ofkj1g5aobtb2p00ajpqg foreign key (customer_id) references customer [42001-176]
2015-01-16 08:56:54.757 INFO 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
2015-01-16 08:56:55.085 INFO 27810 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2015-01-16 08:56:55.102 INFO 27810 --- [ main] hello.Application : Started Application in 2.286 seconds (JVM running for 2.604)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: insert into customer (id, first_name, last_name) values (null, ?, ?)
Hibernate: select customer0_.id as id1_0_, customer0_.first_name as first_na2_0_, customer0_.last_name as last_nam3_0_ from customer customer0_
Customers found with findAll():
-------------------------------
Customer[id=1, firstName='Jack', lastName='Bauer']
Customer[id=2, firstName='Chloe', lastName='O'Brian']
Customer[id=3, firstName='Kim', lastName='Bauer']
Customer[id=4, firstName='David', lastName='Palmer']
Customer[id=5, firstName='Michelle', lastName='Dessler']
Hibernate: select customer0_.id as id1_0_0_, customer0_.first_name as first_na2_0_0_, customer0_.last_name as last_nam3_0_0_ from customer customer0_ where customer0_.id=?
Customer found with findOne(1L):
--------------------------------
Customer[id=1, firstName='Jack', lastName='Bauer']
Hibernate: select customer0_.id as id1_0_, customer0_.first_name as first_na2_0_, customer0_.last_name as last_nam3_0_ from customer customer0_ where customer0_.last_name=?
Customer found with findByLastName('Bauer'):
--------------------------------------------
Customer[id=1, firstName='Jack', lastName='Bauer']
Customer[id=3, firstName='Kim', lastName='Bauer']
Hibernate: select customer0_.id as id1_0_, customer0_.first_name as first_na2_0_, customer0_.last_name as last_nam3_0_ from customer customer0_
Hibernate: delete from customer where id=?
Hibernate: delete from customer where id=?
Hibernate: delete from customer where id=?
Hibernate: delete from customer where id=?
Hibernate: delete from customer where id=?
2015-01-16 08:56:55.258 INFO 27810 --- [ main] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@5d59e6f1: startup date [Fri Jan 16 08:56:53 CST 2015]; root of context hierarchy
2015-01-16 08:56:55.259 INFO 27810 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
2015-01-16 08:56:55.260 INFO 27810 --- [ main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2015-01-16 08:56:55.261 INFO 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
Hibernate: alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists
2015-01-16 08:56:55.261 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists
2015-01-16 08:56:55.261 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "ALTER TABLE ORDER[*] DROP CONSTRAINT FK_M6Q2OFKJ1G5AOBTB2P00AJPQG IF EXISTS "; expected "identifier"; SQL statement:
alter table order drop constraint FK_m6q2ofkj1g5aobtb2p00ajpqg if exists [42001-176]
Hibernate: drop table customer if exists
Hibernate: drop table order if exists
2015-01-16 08:56:55.263 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000389: Unsuccessful: drop table order if exists
2015-01-16 08:56:55.263 ERROR 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : Syntax error in SQL statement "DROP TABLE ORDER[*] IF EXISTS "; expected "identifier"; SQL statement:
drop table order if exists [42001-176]
2015-01-16 08:56:55.263 INFO 27810 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
想法？
TIA， - 奥莱
请尝试更改您的 Order 实体：
package hello;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name = "order_table")
public class Order {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;
protected Order() {}
double amount;
@ManyToOne
Customer customer;
}
解释：
注意 @Table 注释。使用此注释，我将 table 名称指定为 order_table。在您的情况下，hibernate 默认尝试生成 table order。 ORDER 是任何 sql 中的服务词。出现异常是因为 hibernate 正在为 order table 生成 *** 语句，但数据库需要 table 名称而不是服务字 order。
我在 Order 实体中遇到了完全相同的问题，解决了显式定义 table 名称。
@Entity
@Table(name = "order_table")
class Order(
@Id
@GeneratedValue(generator = "system-uuid")
@GenericGenerator(name = "system-uuid", strategy = "uuid2")
val orderId: String,
val customerId: String,
...
)
我对名为 order 的列有同样的问题，但我无法更改它。在列注释中添加反引号解决了它。
@Column(name = "`ORDER`")
val order: String