Persist在开发和生产环境中的工作方式不同。在dev中，发出了一个sql插入语句：
insert into mytable (field1, field2) values (?, ?)
在生产中，插入后立即有select currval('mytable_mykeyfield_seq')个查询：
23-11-2018;16:57:04,255 TRACE org.hibernate.event.internal.AbstractSaveEventListener Transient instance of: com.odin.approvalengineapp.application.domain.ApprovalRequest
23-11-2018;16:57:04,255 TRACE org.hibernate.event.internal.DefaultPersistEventListener Saving transient instance
23-11-2018;16:57:04,256 TRACE org.hibernate.event.internal.AbstractSaveEventListener Saving com.odin.approvalengineapp.application.domain.ApprovalRequest#<null>
23-11-2018;16:57:04,257 TRACE org.hibernate.engine.internal.Cascade Processing cascade ACTION_PERSIST_SKIPLAZY for: com.odin.approvalengineapp.application.domain.ApprovalRequest
23-11-2018;16:57:04,257 TRACE org.hibernate.engine.internal.Cascade Done processing cascade ACTION_PERSIST_SKIPLAZY for: com.odin.approvalengineapp.application.domain.ApprovalRequest
23-11-2018;16:57:04,258 TRACE org.hibernate.event.internal.WrapVisitor Wrapped collection in role: com.odin.approvalengineapp.application.domain.ApprovalRequest.approvalActionHistories
23-11-2018;16:57:04,259 TRACE org.hibernate.engine.spi.ActionQueue Adding an EntityIdentityInsertAction for [com.odin.approvalengineapp.application.domain.ApprovalRequest] object
23-11-2018;16:57:04,259 TRACE org.hibernate.engine.spi.ActionQueue Executing inserts before finding non-nullable transient entities for early insert: [EntityIdentityInsertActioncom.odin.approvalengineapp.application.domain.ApprovalRequest#<null>]
23-11-2018;16:57:04,260 TRACE org.hibernate.engine.spi.ActionQueue Adding insert with no non-nullable, transient entities: [EntityIdentityInsertActioncom.odin.approvalengineapp.application.domain.ApprovalRequest#<null>]
23-11-2018;16:57:04,261 TRACE org.hibernate.engine.spi.ActionQueue Executing insertions before resolved early-insert
23-11-2018;16:57:04,261 DEBUG org.hibernate.engine.spi.ActionQueue Executing identity-insert immediately
23-11-2018;16:57:04,262 TRACE org.hibernate.persister.entity.AbstractEntityPersister Inserting entity: com.odin.approvalengineapp.application.domain.ApprovalRequest (native id)
23-11-2018;16:57:04,263 DEBUG org.hibernate.engine.jdbc.spi.SqlStatementLogger insert into approval_request (action_id, status, creation_date, initiator_id, is_response_send, last_edit_date, request_body, request_id, retry_times) values (?, ?, ?, ?, ?, ?, ?, ?, ?)
23-11-2018;16:57:04,264 TRACE org.hibernate.resource.jdbc.internal.ResourceRegistryStandardImpl Registering statement [org.jboss.jca.adapters.jdbc.jdk8.WrappedPreparedStatementJDK8@6e270417]
23-11-2018;16:57:04,264 TRACE org.hibernate.persister.entity.AbstractEntityPersister Dehydrating entity: com.odin.approvalengineapp.application.domain.ApprovalRequest#<null>
23-11-2018;16:57:04,265 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [1] as [INTEGER] - [0]
23-11-2018;16:57:04,266 DEBUG org.hibernate.type.descriptor.converter.AttributeConverterSqlTypeDescriptorAdapter$1 Converted value on binding : REQUEST_ACCEPTED -> 0
23-11-2018;16:57:04,266 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [2] as [INTEGER] - [0]
23-11-2018;16:57:04,267 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [3] as [TIMESTAMP] - [Fri Nov 23 16:57:04 UTC 2018]
23-11-2018;16:57:04,268 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [4] as [VARCHAR] - [a63e2cb7-d5a0-4eca-adf5-982c64874bd5]
23-11-2018;16:57:04,269 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [5] as [INTEGER] - [0]
23-11-2018;16:57:04,269 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [6] as [TIMESTAMP] - [Fri Nov 23 16:57:04 UTC 2018]
23-11-2018;16:57:04,270 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [7] as [VARCHAR] - [{"performingApplication":"Order Management","actionName":"Create New Order","initiator":"a63e2cb7-d5a0-4eca-adf5-982c64874bd5","entity":{"id":"SO000504","name":"Order","fields":[
{"name":"orderCustomer","value":"50123493-40ed-49da-8ad8-022041f179f5"}
,{"name":"orderDate","value":"22-Nov-2018"},{"name":"orderValidUntil","value":"22-Dec-2018"},{"name":"orderSubTotal","value":"36.0"},{"name":"orderTaxTotal","value":"9.0"},{"name":"orderTotal","value":"45.0"},{"name":"orderComment","value":"Order for the \"Symantec Endpoint Protection Cloud for Users (Monthly)\" Plan for 1 Month(s). "},{"name":"orderPromoCode"},{"name":"orderDetailDiscountPercent","value":"0.0","number":1,"description":"Symantec Endpoint Protection Cloud UserProduct Recurring"},{"name":"orderDetailDiscountAmount","value":"0.0","number":1,"description":"Symantec Endpoint Protection Cloud UserProduct Recurring"},{"name":"costDiscountPercent","value":"0.0","number":1,"description":"Symantec Endpoint Protection Cloud UserProduct Recurring"},{"name":"costDiscountAmount","value":"0.0","number":1,"description":"Symantec Endpoint Protection Cloud UserProduct Recurring"}]},"moduleAPSIdentifier":"f1165975-c686-40ea-863d-781ad0484007"}]
23-11-2018;16:57:04,271 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [8] as [VARCHAR] - [951c0893-82be-4661-a5ae-1c42ba874734]
23-11-2018;16:57:04,271 TRACE org.hibernate.type.descriptor.sql.BasicBinder binding parameter [9] as [INTEGER] - [0]
23-11-2018;16:57:04,274 TRACE org.hibernate.resource.jdbc.internal.ResourceRegistryStandardImpl Releasing statement [org.jboss.jca.adapters.jdbc.jdk8.WrappedPreparedStatementJDK8@6e270417]
23-11-2018;16:57:04,274 TRACE org.hibernate.resource.jdbc.internal.ResourceRegistryStandardImpl Closing prepared statement [org.jboss.jca.adapters.jdbc.jdk8.WrappedPreparedStatementJDK8@6e270417]
23-11-2018;16:57:04,275 TRACE org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl Starting after statement execution processing [AFTER_STATEMENT]
23-11-2018;16:57:04,276 TRACE org.hibernate.resource.jdbc.internal.AbstractLogicalConnectionImplementor LogicalConnection#afterStatement
23-11-2018;16:57:04,276 DEBUG org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl Initiating JDBC connection release from afterStatement
23-11-2018;16:57:04,277 TRACE org.hibernate.resource.jdbc.internal.ResourceRegistryStandardImpl Releasing JDBC resources
23-11-2018;16:57:04,277 DEBUG org.hibernate.engine.jdbc.spi.SqlStatementLogger select currval('approval_request_id_seq')
23-11-2018;16:57:04,278 TRACE org.hibernate.resource.jdbc.internal.ResourceRegistryStandardImpl Registering statement [org.jboss.jca.adapters.jdbc.jdk8.WrappedPreparedStatementJDK8@6307d039]
23-11-2018;16:57:04,280 DEBUG org.hibernate.engine.jdbc.spi.SqlExceptionHelper could not extract ResultSet [n/a]: org.postgresql.util.PSQLException: ERROR: relation "approval_request_id_seq" does not exist
问题是我不明白为什么Hibernate表现不同。开发人员和产品使用相同的wildfly，应用程序和配置（均通过docker映像使用），相同的Postgresql版本。
persistence.xml：
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/persistence"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="appdb" transaction-type="JTA">
<jta-data-source>java:jboss/datasources/appdb</jta-data-source>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQL94Dialect"/>
<property name="hibernate.connection.autocommit" value="true"/>
<property name="hibernate.jta.track_by_thread" value="false"/>
<property name="jboss.entity.manager.jndi.name" value="java:/appdb"/>
<property name="jboss.entity.manager.factory.jndi.name" value="java:/appDSFactory"/>
</properties>
</persistence-unit>
</persistence>
实体：
@Entity
@Table(name = "approval_request")
public class ApprovalRequest {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id", nullable = false)
private Integer id;
@Column(name = "request_id", nullable = false, length = 255)
private String requestId;
...
表结构（在开发和生产中也是如此）：
a8n_approvalengineapp=> \d approval_request
Table "public.approval_request"
Column | Type | Modifiers
------------------+-----------------------------+--------------------------------------------------------------------
id | integer | not null default nextval('approval_request_id_sequence'::regclass)
request_id | character varying(256) | not null
...
Indexes:
"pk_approval_request" PRIMARY KEY, btree (id)
"uk_approval_request_request_id" UNIQUE CONSTRAINT, btree (request_id)
"ix_approval_request_request_id" btree (request_id)
Referenced by:
TABLE "approval_action_history" CONSTRAINT "fk_approval_action_history_request_id" FOREIGN KEY (request_id) REFERENCES approval_request(id)
我使用以下组件：
WildFly Full 11.0.0.Final
Hibernate Core 5.1.10.Final (bundled with Wildfly)
org.postgresql.Driver 42.2
Postgresql 9.6
CentOS 7
OpenJDK 1.8
从http://docs.jboss.org/hibernate/orm/5.1/userguide/html_single/Hibernate_User_Guide.html第2.6.9章开始，我建议java.sql.Statement＃getGeneratedKeys在开发环境中使用，但在生产环境中不使用。为什么？