程序包 org.hibernate.dialect.pagination

类 LegacyFirstLimitHandler

java.lang.Object

org.hibernate.dialect.pagination.AbstractLimitHandler

org.hibernate.dialect.pagination.LegacyFirstLimitHandler

所有已实现的接口:

LimitHandler

直接已知子类:

FirstLimitHandler

public class LegacyFirstLimitHandler
extends AbstractLimitHandler

作者:

Chris Cranford

字段概要

字段

修饰符和类型	字段	说明
static LegacyFirstLimitHandler	INSTANCE

方法概要

修饰符和类型	方法	说明
String	processSql(String sql, RowSelection selection)	Return processed SQL query.
boolean	supportsLimit()	Does this handler support some form of limiting query results via a SQL clause?
boolean	supportsLimitOffset()	Does this handler's LIMIT support (if any) additionally support specifying an offset?
boolean	supportsVariableLimit()	Does this handler support bind variables (i.e., prepared statement parameters) for its limit/offset?
boolean	useMaxForLimit()	Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?

从类继承的方法 org.hibernate.dialect.pagination.AbstractLimitHandler

bindLimitParameters, bindLimitParametersAtEndOfQuery, bindLimitParametersAtStartOfQuery, bindLimitParametersFirst, bindLimitParametersInReverseOrder, convertToFirstRowValue, forceLimitUsage, getMaxOrLimit, setMaxRows

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

INSTANCE

public static final LegacyFirstLimitHandler INSTANCE

方法详细资料

processSql

public String processSql(String sql,
                         RowSelection selection)

从接口复制的说明: LimitHandler

Return processed SQL query.

指定者:

processSql 在接口中 LimitHandler

覆盖:

processSql 在类中 AbstractLimitHandler

参数:

sql - the SQL query to process.

selection - the selection criteria for rows.

返回:

Query statement with LIMIT clause applied.

supportsLimit

public boolean supportsLimit()

从接口复制的说明: LimitHandler

Does this handler support some form of limiting query results via a SQL clause?

指定者:

supportsLimit 在接口中 LimitHandler

覆盖:

supportsLimit 在类中 AbstractLimitHandler

返回:

True if this handler supports some form of LIMIT.

useMaxForLimit

public boolean useMaxForLimit()

从类复制的说明: AbstractLimitHandler

Does the LIMIT clause take a "maximum" row number instead of a total number of returned rows?

This is easiest understood via an example. Consider you have a table with 20 rows, but you only want to retrieve rows number 11 through 20. Generally, a limit with offset would say that the offset = 11 and the limit = 10 (we only want 10 rows at a time); this is specifying the total number of returned rows. Some dialects require that we instead specify offset = 11 and limit = 20, where 20 is the "last" row we want relative to offset (i.e. total number of rows = 20 - 11 = 9)

So essentially, is limit relative from offset? Or is limit absolute?

覆盖:

useMaxForLimit 在类中 AbstractLimitHandler

返回:

True if limit is relative from offset; false otherwise.

supportsLimitOffset

public boolean supportsLimitOffset()

从接口复制的说明: LimitHandler

Does this handler's LIMIT support (if any) additionally support specifying an offset?

指定者:

supportsLimitOffset 在接口中 LimitHandler

覆盖:

supportsLimitOffset 在类中 AbstractLimitHandler

返回:

True if the handler supports an offset within the limit support.

supportsVariableLimit

public boolean supportsVariableLimit()

从类复制的说明: AbstractLimitHandler

Does this handler support bind variables (i.e., prepared statement parameters) for its limit/offset?

覆盖:

supportsVariableLimit 在类中 AbstractLimitHandler

返回:

True if bind variables can be used; false otherwise.