cn.hutool.db.dialect.impl

Class H2Dialect

java.lang.Object

cn.hutool.db.dialect.impl.AnsiSqlDialect

cn.hutool.db.dialect.impl.H2Dialect

All Implemented Interfaces:

Dialect, Serializable

public class H2Dialect
extends AnsiSqlDialect

H2数据库方言

Author:

loolly

See Also:

Serialized Form

Field Summary

Fields inherited from class cn.hutool.db.dialect.impl.AnsiSqlDialect

wrapper

Constructor Summary

Constructors

Constructor and Description
H2Dialect()

Method Summary

Modifier and Type	Method and Description
String	dialectName() 方言名
PreparedStatement	psForUpsert(Connection conn, Entity entity, String... keys) 构建用于upsert的PreparedStatement 方言实现需实现此默认方法，如果没有实现，抛出SQLException
protected SqlBuilder	wrapPageSql(SqlBuilder find, Page page) 根据不同数据库在查询SQL语句基础上包装其分页的语句 各自数据库通过重写此方法实现最小改动情况下修改分页语句

Methods inherited from class cn.hutool.db.dialect.impl.AnsiSqlDialect

getWrapper, psForDelete, psForFind, psForInsert, psForInsertBatch, psForPage, psForPage, psForUpdate, setWrapper

Methods inherited from class java.lang.Object

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

Methods inherited from interface cn.hutool.db.dialect.Dialect

psForCount, psForCount

Constructor Detail

H2Dialect

public H2Dialect()

Method Detail

dialectName

public String dialectName()

Description copied from interface: Dialect

方言名

Specified by:

dialectName in interface Dialect

Overrides:

dialectName in class AnsiSqlDialect

Returns:

方言名

wrapPageSql

protected SqlBuilder wrapPageSql(SqlBuilder find,
                                 Page page)

Description copied from class: AnsiSqlDialect

根据不同数据库在查询SQL语句基础上包装其分页的语句
各自数据库通过重写此方法实现最小改动情况下修改分页语句

Overrides:

wrapPageSql in class AnsiSqlDialect

Parameters:

find - 标准查询语句

page - 分页对象

Returns:

分页语句

psForUpsert

public PreparedStatement psForUpsert(Connection conn,
                                     Entity entity,
                                     String... keys)
                              throws SQLException

Description copied from interface: Dialect

构建用于upsert的PreparedStatement
方言实现需实现此默认方法，如果没有实现，抛出SQLException

Parameters:

conn - 数据库连接对象

entity - 数据实体类（包含表名）

keys - 查找字段，某些数据库此字段必须，如H2，某些数据库无需此字段，如MySQL（通过主键）

Returns:

PreparedStatement

Throws:

SQLException - SQL执行异常，或方言数据不支持此操作