程序包 org.hibernate.annotations

类 QueryHints

java.lang.Object

org.hibernate.annotations.QueryHints

public class QueryHints
extends Object

Consolidation of hints available to Hibernate JPA queries. Mainly used to define features available on Hibernate queries that have no corollary in JPA queries.

字段概要

字段

修饰符和类型	字段	说明
static String	CACHE_MODE	The cache mode to use.
static String	CACHE_REGION	The cache region to use.
static String	CACHEABLE	Are the query results cacheable?
static String	CALLABLE	Is the query callable?
static String	COMMENT	Defines a comment to be applied to the SQL sent to the database.
static String	FETCH_SIZE	Defines the JDBC fetch size to use.
static String	FETCHGRAPH	已过时。 (since 5.4) Use GraphSemantic.FETCH's GraphSemantic.getJpaHintName() instead
static String	FLUSH_MODE	The flush mode to associate with the execution of the query.
static String	FOLLOW_ON_LOCKING	Hint to enable/disable the follow-on-locking mechanism provided by Dialect.useFollowOnLocking(QueryParameters).
static String	LOADGRAPH	已过时。 (since 5.4) Use GraphSemantic.LOAD's GraphSemantic.getJpaHintName() instead
static String	NATIVE_LOCKMODE	Available to apply lock mode to a native SQL query since JPA requires that Query.setLockMode(javax.persistence.LockModeType) throw an IllegalStateException if called for a native query.
static String	PASS_DISTINCT_THROUGH	Hint to enable/disable the pass-distinct-through mechanism.
static String	READ_ONLY	Should entities returned from the query be set in read only mode?
static String	TIMEOUT_HIBERNATE	Apply a Hibernate query timeout, which is defined in seconds.
static String	TIMEOUT_JPA	Apply a JPA query timeout, which is defined in milliseconds.

方法概要

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

CACHE_MODE

public static final String CACHE_MODE

The cache mode to use.

另请参阅:

Query.setCacheMode(org.hibernate.CacheMode), SQLQuery.setCacheMode(org.hibernate.CacheMode), 常量字段值

CACHE_REGION

public static final String CACHE_REGION

The cache region to use.

另请参阅:

Query.setCacheRegion(java.lang.String), SQLQuery.setCacheRegion(java.lang.String), 常量字段值

CACHEABLE

public static final String CACHEABLE

Are the query results cacheable?

另请参阅:

Query.setCacheable(boolean), SQLQuery.setCacheable(boolean), 常量字段值

CALLABLE

public static final String CALLABLE

Is the query callable? Note: only valid for named native sql queries.

另请参阅:

常量字段值

COMMENT

public static final String COMMENT

Defines a comment to be applied to the SQL sent to the database.

另请参阅:

Query.setComment(java.lang.String), SQLQuery.setComment(java.lang.String), 常量字段值

FETCH_SIZE

public static final String FETCH_SIZE

Defines the JDBC fetch size to use.

另请参阅:

Query.setFetchSize(int), SQLQuery.setFetchSize(int), 常量字段值

FLUSH_MODE

public static final String FLUSH_MODE

The flush mode to associate with the execution of the query.

另请参阅:

Query.setFlushMode(org.hibernate.FlushMode), SQLQuery.setFlushMode(javax.persistence.FlushModeType), Session.setFlushMode(org.hibernate.FlushMode), 常量字段值

READ_ONLY

public static final String READ_ONLY

Should entities returned from the query be set in read only mode?

另请参阅:

Query.setReadOnly(boolean), SQLQuery.setReadOnly(boolean), Session.setReadOnly(java.lang.Object, boolean), 常量字段值

TIMEOUT_HIBERNATE

public static final String TIMEOUT_HIBERNATE

Apply a Hibernate query timeout, which is defined in seconds.

另请参阅:

Query.setTimeout(int), SQLQuery.setTimeout(int), 常量字段值

TIMEOUT_JPA

public static final String TIMEOUT_JPA

Apply a JPA query timeout, which is defined in milliseconds.

另请参阅:

常量字段值

NATIVE_LOCKMODE

public static final String NATIVE_LOCKMODE

Available to apply lock mode to a native SQL query since JPA requires that Query.setLockMode(javax.persistence.LockModeType) throw an IllegalStateException if called for a native query.

Accepts a LockModeType or a LockMode

另请参阅:

常量字段值

FETCHGRAPH

@Deprecated
public static final String FETCHGRAPH

已过时。

(since 5.4) Use GraphSemantic.FETCH's GraphSemantic.getJpaHintName() instead

Hint providing a "fetchgraph" EntityGraph. Attributes explicitly specified as AttributeNodes are treated as FetchType.EAGER (via join fetch or subsequent select). Note: Currently, attributes that are not specified are treated as FetchType.LAZY or FetchType.EAGER depending on the attribute's definition in metadata, rather than forcing FetchType.LAZY.

LOADGRAPH

@Deprecated
public static final String LOADGRAPH

已过时。

(since 5.4) Use GraphSemantic.LOAD's GraphSemantic.getJpaHintName() instead

Hint providing a "loadgraph" EntityGraph. Attributes explicitly specified as AttributeNodes are treated as FetchType.EAGER (via join fetch or subsequent select). Attributes that are not specified are treated as FetchType.LAZY or FetchType.EAGER depending on the attribute's definition in metadata

FOLLOW_ON_LOCKING

public static final String FOLLOW_ON_LOCKING

Hint to enable/disable the follow-on-locking mechanism provided by Dialect.useFollowOnLocking(QueryParameters). A value of true enables follow-on-locking, whereas a value of false disables it. If the value is null, the Dialect strategy is going to be used instead.

从以下版本开始:

5.2

另请参阅:

常量字段值

PASS_DISTINCT_THROUGH

public static final String PASS_DISTINCT_THROUGH

Hint to enable/disable the pass-distinct-through mechanism. A value of true enables pass-distinct-through, whereas a value of false disables it. When the pass-distinct-through is disabled, the HQL and JPQL distinct clause is no longer passed to the SQL statement.

从以下版本开始:

5.2

另请参阅:

常量字段值