sf.database.dialect.h2

Class H2Dialect

java.lang.Object

sf.database.dialect.DBDialect

sf.database.dialect.h2.H2Dialect

All Implemented Interfaces:

IDBDialect

public class H2Dialect
extends DBDialect

Field Summary

Fields inherited from class sf.database.dialect.DBDialect

caseHandler, features, keywords, quoteChar

Constructor Summary

Constructors

Constructor and Description
H2Dialect()

Method Summary

Modifier and Type	Method and Description
boolean	createEntity(Connection conn, TableMapping en) 根据实体信息，返回某实体的建表语句
String	evalFieldType(ColumnMapping mf)
String	getDefaultSchema() 不同数据库登录后，所在的默认schema是不一样的 Oracle是以登录的用户名作为schema的。 mysql是只有catlog不区分schema的。 derby支持匿名访问，此时好像是位于APP这个schema下。 SQL Server默认是在dbo这个schema下 因此对于无法确定当前schema的场合，使用这里提供的schema名称作为当前schema
String	getHibernateDialect() 返回对应的 Hibernate 的 Dialect
List<String>	getIndexNames(TableMapping en, Connection conn)
String	getJooqDialect()
String	getName()
String	getQueryDslDialect()
String	sqlColumnAdd(String table, String column_definition, String column_position)
String	sqlColumnDrop(String table, String column)
String	sqlColumnModify(String table, String column_definition, String column_position)
String	sqlPageList(String sql, long offset, int limit) 生成分页sql
String	sqlTableDrop(String table)
String	sqlTableRename(String oldName, String newName)
boolean	supportsColumnPosition() 是否支持在添加字段的时候，指定字段位置
String	uniqueSql(String tableName, String name, String[] columnNames) 生成unique 语句.

Methods inherited from class sf.database.dialect.DBDialect

accept, addComment, containKeyword, createAddColumnSql, createIndexSql, createRelation, createRelation, createResultSetMetaSql, createUniqueSql, dropEntity, dropRelation, escapeSqlValue, execute, execute, existsTables, getCatalog, getColumnAutoIncreamentValue, getColumnDefinition, getColumnLength, getColumnNameToUse, getColumnPrecision, getColumnScale, getDriverClass, getNvlFunction, getObjectNameToUse, getPrimaryKeySql, getProperty, getProperty, getPropertyInt, getPropertyLong, getQuoteChar, getSchema, getSeqNextValSql, getSequenceInfo, getSqlStatmentSeparator, gSQL, has, isCaseSensitive, notHas, setProperty, setupEntityField, unwrapper, wrapKeyword, wrapKeyword

Methods inherited from class java.lang.Object

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

Constructor Detail

H2Dialect

public H2Dialect()

Method Detail

getName

public String getName()

Specified by:

getName in interface IDBDialect

Specified by:

getName in class DBDialect

Returns:

当前数据库类型，名称参见 DB 这个枚举类型

See Also:

RDBMS

getDefaultSchema

public String getDefaultSchema()

Description copied from interface: IDBDialect

不同数据库登录后，所在的默认schema是不一样的

• Oracle是以登录的用户名作为schema的。
• mysql是只有catlog不区分schema的。
• derby支持匿名访问，此时好像是位于APP这个schema下。
• SQL Server默认是在dbo这个schema下

因此对于无法确定当前schema的场合，使用这里提供的schema名称作为当前schema

Specified by:

getDefaultSchema in interface IDBDialect

Overrides:

getDefaultSchema in class DBDialect

Returns:

当前RDBMS的缺省Schema

sqlTableDrop

public String sqlTableDrop(String table)

Specified by:

sqlTableDrop in class DBDialect

sqlTableRename

public String sqlTableRename(String oldName,
                             String newName)

Specified by:

sqlTableRename in class DBDialect

sqlColumnAdd

public String sqlColumnAdd(String table,
                           String column_definition,
                           String column_position)

Specified by:

sqlColumnAdd in class DBDialect

sqlColumnModify

public String sqlColumnModify(String table,
                              String column_definition,
                              String column_position)

Specified by:

sqlColumnModify in class DBDialect

sqlColumnDrop

public String sqlColumnDrop(String table,
                            String column)

Specified by:

sqlColumnDrop in class DBDialect

sqlPageList

public String sqlPageList(String sql,
                          long offset,
                          int limit)

Description copied from class: DBDialect

生成分页sql

Overrides:

sqlPageList in class DBDialect

Parameters:

sql - 原始sql

offset - 开始位置，从0开始 （= (Page-1)*PageSize）

limit - 返回的限制大小（= 分页大小 PageSize）

Returns:

如果不支持，返回 null

supportsColumnPosition

public boolean supportsColumnPosition()

Description copied from class: DBDialect

是否支持在添加字段的时候，指定字段位置

Overrides:

supportsColumnPosition in class DBDialect

getHibernateDialect

public String getHibernateDialect()

Description copied from class: DBDialect

返回对应的 Hibernate 的 Dialect

Specified by:

getHibernateDialect in class DBDialect

evalFieldType

public String evalFieldType(ColumnMapping mf)

Overrides:

evalFieldType in class DBDialect

uniqueSql

public String uniqueSql(String tableName,
                        String name,
                        String[] columnNames)

Description copied from class: DBDialect

生成unique 语句.

Specified by:

uniqueSql in class DBDialect

Parameters:

tableName - 表名

name - 名称

columnNames - 表的列名,

Returns:

createEntity

public boolean createEntity(Connection conn,
                            TableMapping en)

Description copied from class: DBDialect

根据实体信息，返回某实体的建表语句

Specified by:

createEntity in class DBDialect

en - 实体

Returns:

是否创建成功

getIndexNames

public List<String> getIndexNames(TableMapping en,
                                  Connection conn)
                           throws SQLException

Overrides:

getIndexNames in class DBDialect

Throws:

SQLException

getQueryDslDialect

public String getQueryDslDialect()

getJooqDialect

public String getJooqDialect()