当前页面:
在线文档首页 >
Hibernate 3.2.4 正式版 API 英文文档
DerbyDialect (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档
org.hibernate.dialect
Class DerbyDialect
java.lang.Object
org.hibernate.dialect.Dialect
org.hibernate.dialect.DB2Dialect
org.hibernate.dialect.DerbyDialect
- public class DerbyDialect
- extends DB2Dialect
- Author:
- Simon Johnston
Hibernate Dialect for Cloudscape 10 - aka Derby. This implements both an
override for the identity column generator as well as for the case statement
issue documented at:
http://www.jroller.com/comments/kenlars99/Weblog/cloudscape_soon_to_be_derby
|
Nested Class Summary |
static class |
DerbyDialect.DerbyTrimFunctionEmulation
A specialized function template to emulate the ANSI trim function on Derby DB
since it does not support the full trim specification. |
| Methods inherited from class org.hibernate.dialect.DB2Dialect |
generateTemporaryTableName, getAddColumnString, getCreateSequenceString, getCreateTemporaryTablePostfix, getCreateTemporaryTableString, getCurrentTimestampSelectString, getCurrentTimestampSQLFunctionName, getDropSequenceString, getForUpdateString, getIdentityInsertString, getIdentitySelectString, getLimitString, getLowercaseFunction, getResultSet, getSelectClauseNullString, getSequenceNextValString, isCurrentTimestampSelectStringCallable, main, registerResultSetOutParameter, supportsCommentOn, supportsCurrentTimestampSelection, supportsEmptyInList, supportsIdentityColumns, supportsNotNullUnique, supportsOuterJoinForUpdate, supportsParametersInInsertSelect, supportsTemporaryTables, supportsUnionAll, useMaxForLimit |
| Methods inherited from class org.hibernate.dialect.Dialect |
appendIdentitySelectToInsert, appendLockHint, applyLocksToSql, areStringComparisonsCaseInsensitive, bindLimitParametersFirst, bindLimitParametersInReverseOrder, buildSQLExceptionConverter, closeQuote, createOuterJoinFragment, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, dropTemporaryTableAfterUse, forUpdateOfColumns, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getCascadeConstraintsString, getCastTypeName, getColumnComment, getCreateMultisetTableString, getCreateSequenceString, getCreateSequenceStrings, getCreateSequenceStrings, getCreateTableString, getDefaultProperties, getDialect, getDialect, getDropForeignKeyString, getDropSequenceStrings, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIdentityColumnString, getIdentitySelectString, getKeywords, getLimitString, getLockingStrategy, getMaxAliasLength, getNoColumnsInsertString, getNullColumnString, getSelectGUIDString, getSelectSequenceNextValString, getTableComment, getTableTypeString, getTypeName, getTypeName, getViolatedConstraintNameExtracter, hasAlterTable, hasDataTypeInIdentityColumn, hasSelfReferentialForeignKeyBug, openQuote, performTemporaryTableDDLInIsolation, qualifyIndexName, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, supportsBindAsCallableArgument, supportsCascadeDelete, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsExistsInSelect, supportsExpectedLobUsagePattern, supportsIfExistsAfterTableName, supportsIfExistsBeforeTableName, supportsInsertSelectIdentity, supportsPooledSequences, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsRowValueConstructorSyntax, supportsRowValueConstructorSyntaxInInList, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsUnboundedLobLocatorMaterialization, supportsUnique, supportsUniqueConstraintInCreateAlterTable, supportsVariableLimit, toBooleanValueString, toString, transformSelectString, useInputStreamToInsertBlob |
DerbyDialect
public DerbyDialect()
getIdentityColumnString
public String getIdentityColumnString()
- This is different in Cloudscape to DB2.
- Overrides:
getIdentityColumnString in class DB2Dialect
createCaseFragment
public CaseFragment createCaseFragment()
- Return the case statement modified for Cloudscape.
- Overrides:
createCaseFragment in class Dialect
- Returns:
- This dialect's
CaseFragment strategy.
dropConstraints
public boolean dropConstraints()
- Description copied from class:
Dialect
- Do we need to drop constraints before dropping tables in this dialect?
- Overrides:
dropConstraints in class DB2Dialect
getNativeIdentifierGeneratorClass
public Class getNativeIdentifierGeneratorClass()
- Description copied from class:
Dialect
- The class (which implements
IdentifierGenerator)
which acts as this dialects native generation strategy.
Comes into play whenever the user specifies the native generator.
- Overrides:
getNativeIdentifierGeneratorClass in class Dialect
- Returns:
- The native generator class.
supportsSequences
public boolean supportsSequences()
- Description copied from class:
Dialect
- Does this dialect support sequences?
- Overrides:
supportsSequences in class DB2Dialect
supportsLimit
public boolean supportsLimit()
- Description copied from class:
Dialect
- Does this dialect support some form of limiting query results
via a SQL clause?
- Overrides:
supportsLimit in class DB2Dialect
supportsLimitOffset
public boolean supportsLimitOffset()
- Description copied from class:
Dialect
- Does this dialect's LIMIT support (if any) additionally
support specifying an offset?
- Overrides:
supportsLimitOffset in class Dialect
- Returns:
- True if the dialect supports an offset within the limit support.
getQuerySequencesString
public String getQuerySequencesString()
- Description copied from class:
Dialect
- Get the select command used retrieve the names of all sequences.
- Overrides:
getQuerySequencesString in class DB2Dialect
supportsLobValueChangePropogation
public boolean supportsLobValueChangePropogation()
- Description copied from class:
Dialect
- Does the dialect support propogating changes to LOB
values back to the database? Talking about mutating the
internal value of the locator as opposed to supplying a new
locator instance...
For BLOBs, the internal value might be changed by:
Blob.setBinaryStream(long),
Blob.setBytes(long, byte[]),
Blob.setBytes(long, byte[], int, int),
or Blob.truncate(long).
For CLOBs, the internal value might be changed by:
Clob.setAsciiStream(long),
Clob.setCharacterStream(long),
Clob.setString(long, String),
Clob.setString(long, String, int, int),
or Clob.truncate(long).
NOTE : I do not know the correct answer currently for
databases which (1) are not part of the cruise control process
or (2) do not Dialect.supportsExpectedLobUsagePattern().
- Overrides:
supportsLobValueChangePropogation in class Dialect
- Returns:
- True if the changes are propogated back to the
database; false otherwise.
