java.lang.Object
- org.hibernate.dialect.Dialect
- - org.hibernate.dialect.OracleDialect

All Implemented Interfaces:

ConversionContext

Direct Known Subclasses:

Oracle10gDialect, Oracle12cDialect, Oracle8iDialect, Oracle9iDialect
```
public class OracleDialect
extends Dialect
```
A SQL dialect for Oracle 8i and above.

Nested Class Summary
- Nested classes/interfaces inherited from class org.hibernate.dialect.Dialect
  Dialect.SizeStrategy, Dialect.SizeStrategyImpl

Field Summary

Fields
Modifier and Type Field Description

static String PREFER_LONG_RAW
- Fields inherited from class org.hibernate.dialect.Dialect
  CLOSED_QUOTE, LEGACY_LOB_MERGE_STRATEGY, LOG_BASE2OF10, NEW_LOCATOR_LOB_MERGE_STRATEGY, QUOTE, STANDARD_DEFAULT_BATCH_LOAD_SIZING_STRATEGY, STREAM_XFER_LOB_MERGE_STRATEGY

Constructor Summary

Constructors
Constructor Description

OracleDialect()

OracleDialect(DatabaseVersion version)

OracleDialect(DialectResolutionInfo info)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`appendBinaryLiteral(SqlAppender appender, byte[] bytes)`
`void`	`appendDatetimeFormat(SqlAppender appender, String format)`	Translate the given datetime format string from the pattern language defined by Java's `DateTimeFormatter` to whatever pattern language is understood by the native datetime formatting function for this database (often the `to_char()` function).
`IdentifierHelper`	`buildIdentifierHelper(IdentifierHelperBuilder builder, DatabaseMetaData dbMetaData)`	Build the IdentifierHelper indicated by this Dialect for handling identifier conversions.
`SQLExceptionConversionDelegate`	`buildSQLExceptionConversionDelegate()`	Build an instance of a `SQLExceptionConversionDelegate` for interpreting dialect-specific error or SQLState codes.
`boolean`	`canCreateSchema()`	Does this dialect support schema creation?
`String`	`castPattern(CastType from, CastType to)`	Oracle doesn't have any sort of `Types.BOOLEAN` type or `Types.TIME` type, and its default behavior for casting dates and timestamps to and from strings is just awful.
`protected String`	`columnType(int sqlTypeCode)`	The column type name for a given JDBC type code defined in `Types` or `SqlTypes`.
`void`	`contributeTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)`	Allows the Dialect to contribute additional types
`String`	`currentDate()`	Translation of the HQL/JPQL `current_date` function, which maps to the Java type `java.sql.Date`, and of the HQL `local_date` function which maps to the Java type `java.sql.LocalDate`.
`String`	`currentLocalTime()`	Translation of the HQL `local_time` function, which maps to the Java type `java.time.LocalTime` which is a time with no time zone.
`String`	`currentLocalTimestamp()`	Translation of the HQL `local_datetime` function, which maps to the Java type `java.time.LocalDateTime` which is a datetime with no time zone.
`String`	`currentTime()`	Translation of the HQL/JPQL `current_time` function, which maps to the Java type `java.sql.Time` which is a time with no time zone.
`String`	`currentTimestamp()`	Translation of the HQL/JPQL `current_timestamp` function, which maps to the Java type `java.sql.Timestamp` which is a datetime with no time zone.
`String`	`currentTimestampWithTimeZone()`	Translation of the HQL `offset_datetime` function, which maps to the Java type `java.time.OffsetDateTime` which is a datetime with a time zone.
`static Replacer`	`datetimeFormat(String format, boolean useFm, boolean resetFm)`
`boolean`	`dropConstraints()`	Do we need to drop constraints before dropping tables in this dialect?
`String`	`extractPattern(TemporalUnit unit)`	Oracle supports a limited list of temporal fields in the extract() function, but we can emulate some of them by using to_char() with a format string instead of extract().
`boolean`	`forceLobAsLastValue()`	HHH-4635 Oracle expects all Lob values to be last in inserts and updates.
`String`	`generatedAs(String generatedAs)`
`String`	`getAddColumnString()`	The syntax used to add a column to a table (optional).
`String`	`getArrayTypeName(String elementTypeName)`	The SQL type name for the array of the given type name.
`CallableStatementSupport`	`getCallableStatementSupport()`
`String`	`getCascadeConstraintsString()`	The keyword that specifies that a `drop table` operation should be cascaded to its constraints, typically `" cascade"` where the leading space is required, or the empty string if there is no such keyword in this dialect.
`String`	`getCurrentSchemaCommand()`	Get the SQL command used to retrieve the current schema name.
`String`	`getCurrentTimestampSelectString()`	Retrieve the command used to retrieve the current timestamp from the database.
`int`	`getDefaultStatementBatchSize()`	The default value to use for the configuration property "hibernate.jdbc.batch_size".
`boolean`	`getDefaultUseGetGeneratedKeys()`	The default value to use for the configuration property "hibernate.jdbc.use_get_generated_keys".
`SqmMultiTableInsertStrategy`	`getFallbackSqmInsertStrategy(EntityMappingType rootEntityDescriptor, RuntimeModelCreationContext runtimeModelCreationContext)`
`SqmMultiTableMutationStrategy`	`getFallbackSqmMutationStrategy(EntityMappingType rootEntityDescriptor, RuntimeModelCreationContext runtimeModelCreationContext)`
`String`	`getForUpdateNowaitString()`	Retrieves the `FOR UPDATE NOWAIT` syntax specific to this dialect.
`String`	`getForUpdateNowaitString(String aliases)`	Get the `FOR UPDATE OF column_list NOWAIT` fragment appropriate for this dialect given the aliases of the columns to be write locked.
`String`	`getForUpdateSkipLockedString()`	Retrieves the `FOR UPDATE SKIP LOCKED` syntax specific to this dialect.
`String`	`getForUpdateSkipLockedString(String aliases)`	Get the `FOR UPDATE OF column_list SKIP LOCKED` fragment appropriate for this dialect given the aliases of the columns to be write locked.
`String`	`getForUpdateString(String aliases)`	Get the `FOR UPDATE OF column_list` fragment appropriate for this dialect given the aliases of the columns to be write locked.
`long`	`getFractionalSecondPrecisionInNanos()`	We minimize multiplicative factors by using seconds (with fractional part) as the "native" precision for duration arithmetic.
`IdentityColumnSupport`	`getIdentityColumnSupport()`	Get the appropriate `IdentityColumnSupport`
`int`	`getInExpressionCountLimit()`	Return the limit that the underlying database places on the number of elements in an `IN` predicate.
`LimitHandler`	`getLimitHandler()`	Returns a `LimitHandler` that implements support for `Query.setMaxResults(int)` and `Query.setFirstResult(int)` for this dialect.
`int`	`getMaxAliasLength()`	What is the maximum length Hibernate can use for generated aliases?
`int`	`getMaxIdentifierLength()`	What is the maximum identifier length supported by the dialect?
`int`	`getMaxVarbinaryLength()`	The longest possible length of a `Types.VARBINARY`-like column.
`int`	`getMaxVarcharLength()`	The longest possible length of a `Types.VARCHAR`-like column.
`String`	`getNativeIdentifierGeneratorStrategy()`	Resolves the native generation strategy associated to this dialect.
`int`	`getPreferredSqlTypeCodeForArray()`	The JDBC `type code` to use for mapping properties of basic Java array or `Collection` types.
`int`	`getPreferredSqlTypeCodeForBoolean()`	The JDBC `type code` to use for mapping properties of Java type `boolean`.
`String`	`getQueryHintString(String sql, String hints)`	Apply a hint to the query.
`String`	`getQuerySequencesString()`	Get the select command used retrieve the names of all sequences.
`String`	`getReadLockString(int timeout)`	Get the string to append to SELECT statements to acquire READ locks for this dialect.
`String`	`getReadLockString(String aliases, int timeout)`	Get the string to append to SELECT statements to acquire READ locks for this dialect given the aliases of the columns to be read locked.
`ResultSet`	`getResultSet(CallableStatement ps)`	Given a callable statement previously processed by `Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int)`, extract the `ResultSet` from the OUT parameter.
`ResultSet`	`getResultSet(CallableStatement statement, int position)`	Given a callable statement previously processed by `Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int)`, extract the `ResultSet`.
`ResultSet`	`getResultSet(CallableStatement statement, String name)`	Given a callable statement previously processed by `Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int)`, extract the `ResultSet` from the OUT parameter.
`String`	`getSelectClauseNullString(int sqlType, TypeConfiguration typeConfiguration)`	Given a `Types` type code, determine an appropriate null value to use in a select clause.
`String`	`getSelectGUIDString()`	Get the command used to select a GUID from the underlying database.
`SequenceInformationExtractor`	`getSequenceInformationExtractor()`	A source of `SequenceInformation`.
`SequenceSupport`	`getSequenceSupport()`
`SqlAstTranslatorFactory`	`getSqlAstTranslatorFactory()`	Return an SqlAstTranslatorFactory specific for the Dialect.
`TemporaryTableKind`	`getSupportedTemporaryTableKind()`
`String`	`getTemporaryTableCreateOptions()`
`TimeZoneSupport`	`getTimeZoneSupport()`	How the Dialect supports time zone types like `Types.TIMESTAMP_WITH_TIMEZONE`.
`ViolatedConstraintNameExtractor`	`getViolatedConstraintNameExtractor()`
`String`	`getWriteLockString(int timeout)`	Get the string to append to SELECT statements to acquire WRITE locks for this dialect.
`String`	`getWriteLockString(String aliases, int timeout)`	Get the string to append to SELECT statements to acquire WRITE locks for this dialect given the aliases of the columns to be write locked.
`RowLockStrategy`	`getWriteRowLockStrategy()`	The row lock strategy to use for write locks.
`protected void`	`initDefaultProperties()`	Set appropriate default values for configuration properties.
`void`	`initializeFunctionRegistry(QueryEngine queryEngine)`	Initialize the given registry with any dialect-specific functions.
`boolean`	`isCurrentTimestampSelectStringCallable()`	Should the value returned by `Dialect.getCurrentTimestampSelectString()` be treated as callable.
`boolean`	`isEmptyStringTreatedAsNull()`	Return whether the dialect considers an empty-string value as null.
`protected void`	`registerColumnTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry)`	Register ANSI-standard column types using the length limits defined by `Dialect.getMaxVarcharLength()`, `Dialect.getMaxNVarcharLength()`, and `Dialect.getMaxVarbinaryLength()`.
`int`	`registerResultSetOutParameter(CallableStatement statement, int col)`	Registers a parameter (either OUT, or the new REF_CURSOR param type available in Java 8) capable of returning `ResultSet` by position.
`int`	`registerResultSetOutParameter(CallableStatement statement, String name)`	Registers a parameter (either OUT, or the new REF_CURSOR param type available in Java 8) capable of returning `ResultSet` by name.
`JdbcType`	`resolveSqlTypeDescriptor(String columnTypeName, int jdbcTypeCode, int precision, int scale, JdbcTypeRegistry jdbcTypeRegistry)`
`boolean`	`supportsBitType()`	Oracle has neither `BIT` nor `BOOLEAN`.
`boolean`	`supportsCommentOn()`	Does this dialect/database support commenting on tables, columns, etc?
`boolean`	`supportsCurrentTimestampSelection()`	Does this dialect support a way to retrieve the database's current timestamp value?
`boolean`	`supportsExistsInSelect()`	Does the dialect support an exists statement in the select clause?
`boolean`	`supportsFetchClause(FetchClauseType type)`	Does this dialect support the given fetch clause type.
`boolean`	`supportsLateral()`	Does this dialect support the SQL lateral keyword or a proprietary alternative?
`boolean`	`supportsNamedParameters(DatabaseMetaData databaseMetaData)`	Override the DatabaseMetaData#supportsNamedParameters()
`boolean`	`supportsNoWait()`	Does this dialect/database support NO_WAIT timeout.
`boolean`	`supportsOffsetInSubquery()`	Does this dialect support offset in subqueries? Ex: select * from Table1 where col1 in (select col1 from Table2 order by col2 limit 1 offset 1)
`boolean`	`supportsPartitionBy()`	Does the underlying database support partition by?
`boolean`	`supportsSkipLocked()`	Does this dialect/database support SKIP_LOCKED timeout.
`boolean`	`supportsTupleDistinctCounts()`	Does this dialect support `count(distinct a,b)`?
`boolean`	`supportsWindowFunctions()`	Does this dialect support window functions like `row_number() over (..)`?
`String`	`timestampaddPattern(TemporalUnit unit, TemporalType temporalType, IntervalType intervalType)`	Obtain a pattern for the SQL equivalent to a `timestampadd()` function call.
`String`	`timestampdiffPattern(TemporalUnit unit, TemporalType fromTemporalType, TemporalType toTemporalType)`	Obtain a pattern for the SQL equivalent to a `timestampdiff()` function call.
`boolean`	`useFollowOnLocking(String sql, QueryOptions queryOptions)`	For Oracle, the FOR UPDATE clause cannot be applied when using ORDER BY, DISTINCT or views.

Methods inherited from class org.hibernate.dialect.Dialect
addSqlHintOrComment, appendArrayLiteral, appendBooleanValueString, appendDateTimeLiteral, appendDateTimeLiteral, appendDateTimeLiteral, appendIntervalLiteral, appendLiteral, appendLockHint, applyLocksToSql, augmentPhysicalTableTypes, augmentRecognizedTableTypes, canCreateCatalog, castType, checkVersion, closeQuote, defaultScrollMode, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, equivalentTypes, escapeComment, getAddColumnSuffixString, getAddForeignKeyConstraintString, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getAlterTableString, getAuxiliaryDatabaseObjectExporter, getBooleanCheckCondition, getCaseInsensitiveLike, getColumnAliasExtractor, getColumnComment, getCreateCatalogCommand, getCreateMultisetTableString, getCreateSchemaCommand, getCreateTableString, getCreateTemporaryTableColumnAnnotation, getDefaultBatchLoadSizingStrategy, getDefaultDecimalPrecision, getDefaultLobLength, getDefaultNonContextualLobCreation, getDefaultProperties, getDefaultTimestampPrecision, getDoublePrecision, getDropCatalogCommand, getDropForeignKeyString, getDropSchemaCommand, getDropTableString, getEnumCheckCondition, getFloatPrecision, getForeignKeyExporter, getForUpdateString, getForUpdateString, getForUpdateString, getForUpdateString, getGroupBySelectItemReferenceStrategy, getHqlTranslator, getIndexExporter, getKeywords, getLobMergeStrategy, getLockingStrategy, getLockRowIdentifier, getLowercaseFunction, getMaxNVarcharLength, getMinimumSupportedVersion, getNameQualifierSupport, getNationalizationSupport, getNoColumnsInsertString, getNullColumnString, getNullColumnString, getNullOrdering, getQueryHintString, getReadRowLockStrategy, getSchemaNameResolver, getSequenceExporter, getSizeStrategy, getSqmTranslatorFactory, getTableComment, getTableExporter, getTableTypeString, getTemporaryTableAfterUseAction, getTemporaryTableBeforeUseAction, getTemporaryTableCreateCommand, getTemporaryTableDdlTransactionHandling, getTemporaryTableDropCommand, getTemporaryTableExporter, getTemporaryTableTruncateCommand, getUniqueDelegate, getUniqueKeyExporter, getVersion, hasAlterTable, hasDataTypeBeforeGeneratedAs, hasSelfReferentialForeignKeyBug, inlineLiteral, isAnsiNullOn, isJdbcLogWarningsEnabledByDefault, isLockTimeoutParameterized, openQuote, prependComment, qualifyIndexName, quote, registerDefaultKeywords, registerKeyword, registerKeywords, requiresFloatCastingOfIntegerDivision, requiresParensForTupleCounts, requiresParensForTupleDistinctCounts, resolveSqlTypeCode, resolveSqlTypeCode, resolveSqlTypeLength, supportsBindAsCallableArgument, supportsCascadeDelete, supportsCaseInsensitiveLike, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsDistinctFromPredicate, supportsExpectedLobUsagePattern, supportsFractionalTimestampArithmetic, supportsIfExistsAfterAlterTable, supportsIfExistsAfterConstraintName, supportsIfExistsAfterTableName, supportsIfExistsBeforeConstraintName, supportsIfExistsBeforeTableName, supportsJdbcConnectionLobCreation, supportsLobValueChangePropagation, supportsLockTimeouts, supportsNoColumnsInsert, supportsNonQueryWithCTE, supportsNullPrecedence, supportsOrderByInSubquery, supportsOrdinalSelectItemReference, supportsOuterJoinForUpdate, supportsParametersInInsertSelect, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsStandardArrays, supportsSubqueryInSelect, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTemporalLiteralOffset, supportsTemporaryTablePrimaryKey, supportsTemporaryTables, supportsTruncateWithCast, supportsTupleCounts, supportsUnboundedLobLocatorMaterialization, supportsUnionAll, supportsUnionInSubquery, supportsValuesList, supportsValuesListForInsert, supportsWait, toBooleanValueString, toString, transformSelectString, translateDurationField, translateExtractField, trimPattern, useInputStreamToInsertBlob

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - PREFER_LONG_RAW
```
public static final String PREFER_LONG_RAW
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - OracleDialect
```
public OracleDialect()
```
  - OracleDialect
```
public OracleDialect(DatabaseVersion version)
```
  - OracleDialect
```
public OracleDialect(DialectResolutionInfo info)
```
- Method Detail
  - getPreferredSqlTypeCodeForBoolean
```
public int getPreferredSqlTypeCodeForBoolean()
```
    Description copied from class: Dialect
    
    The JDBC type code to use for mapping properties of Java type boolean.
    Usually Types.BOOLEAN or Types.BIT.
    
    Overrides:
    
    getPreferredSqlTypeCodeForBoolean in class Dialect
    
    Returns:
    
    one of the type codes defined by Types.
  - initializeFunctionRegistry
```
public void initializeFunctionRegistry(QueryEngine queryEngine)
```
    Description copied from class: Dialect
    Initialize the given registry with any dialect-specific functions.
    Support for certain SQL functions is required, and if the database does not support a required function, then the dialect must define a way to emulate it.
    These required functions include the functions defined by the JPA query language specification:
    
    avg(arg) - aggregate function
    count([distinct ]arg) - aggregate function
    max(arg) - aggregate function
    min(arg) - aggregate function
    sum(arg) - aggregate function
    
    coalesce(arg0, arg1, ...)
    nullif(arg0, arg1)
    
    lower(arg)
    upper(arg)
    length(arg)
    concat(arg0, arg1, ...)
    locate(pattern, string[, start])
    substring(string, start[, length])
    trim([[spec ][character ]from] string)
    
    abs(arg)
    mod(arg0, arg1)
    sqrt(arg)
    
    current date
    current time
    current timestamp
    Along with an additional set of functions defined by ANSI SQL:
    
    any(arg) - aggregate function
    every(arg) - aggregate function
    
    cast(arg as Type)
    extract(field from arg)
    
    ln(arg)
    exp(arg)
    power(arg0, arg1)
    floor(arg)
    ceiling(arg)
    
    position(pattern in string)
    substring(string from start[ for length])
    overlay(string placing replacement from start[ for length])
    And the following functions for working with java.time types:
    
    local date
    local time
    local datetime
    offset datetime
    instant
    And a number of additional "standard" functions:
    
    left(string, length)
    right(string, length)
    replace(string, pattern, replacement)
    pad(string with length spec[ character])
    
    log10(arg)
    sign(arg)
    sin(arg)
    cos(arg)
    tan(arg)
    asin(arg)
    acos(arg)
    atan(arg)
    atan2(arg0, arg1)
    round(arg0, arg1)
    least(arg0, arg1, ...)
    greatest(arg0, arg1, ...)
    
    format(datetime as pattern)
    collate(string as collation)
    str(arg) - synonym of cast(a as String)
    ifnull(arg0, arg1) - synonym of coalesce(a, b)
    Finally, the following functions are defined as abbreviations for extract(), and desugared by the parser:
    
    second(arg) - synonym of extract(second from a)
    minute(arg) - synonym of extract(minute from a)
    hour(arg) - synonym of extract(hour from a)
    day(arg) - synonym of extract(day from a)
    month(arg) - synonym of extract(month from a)
    year(arg) - synonym of extract(year from a)
    Note that according to this definition, the second() function returns a floating point value, contrary to the integer type returned by the native function with this name on many databases. Thus, we don't just naively map these HQL functions to the native SQL functions with the same names.
    Overrides:
    
    initializeFunctionRegistry in class Dialect
  - getMaxVarcharLength
```
public int getMaxVarcharLength()
```
    Description copied from class: Dialect
    
    The longest possible length of a Types.VARCHAR-like column. For longer column lengths, use some sort of text-like type for the column.
    
    Overrides:
    
    getMaxVarcharLength in class Dialect
  - getMaxVarbinaryLength
```
public int getMaxVarbinaryLength()
```
    Description copied from class: Dialect
    
    The longest possible length of a Types.VARBINARY-like column. For longer column lengths, use some sort of image-like type for the column.
    
    Overrides:
    
    getMaxVarbinaryLength in class Dialect
  - getSqlAstTranslatorFactory
```
public SqlAstTranslatorFactory getSqlAstTranslatorFactory()
```
    Description copied from class: Dialect
    
    Return an SqlAstTranslatorFactory specific for the Dialect. Return null to use Hibernate's standard translator.
    
    Overrides:
    
    getSqlAstTranslatorFactory in class Dialect
    
    See Also:
    
    StandardSqlAstTranslatorFactory, JdbcEnvironment.getSqlAstTranslatorFactory()
  - currentDate
```
public String currentDate()
```
    Description copied from class: Dialect
    
    Translation of the HQL/JPQL current_date function, which maps to the Java type java.sql.Date, and of the HQL local_date function which maps to the Java type java.sql.LocalDate.
    
    Overrides:
    
    currentDate in class Dialect
  - currentTime
```
public String currentTime()
```
    Description copied from class: Dialect
    
    Translation of the HQL/JPQL current_time function, which maps to the Java type java.sql.Time which is a time with no time zone. This contradicts ANSI SQL where current_time has the type TIME WITH TIME ZONE.
    It is recommended to override this in dialects for databases which support localtime or time at local.
    
    Overrides:
    
    currentTime in class Dialect
  - currentTimestamp
```
public String currentTimestamp()
```
    Description copied from class: Dialect
    
    Translation of the HQL/JPQL current_timestamp function, which maps to the Java type java.sql.Timestamp which is a datetime with no time zone. This contradicts ANSI SQL where current_timestamp has the type TIMESTAMP WITH TIME ZONE.
    It is recommended to override this in dialects for databases which support localtimestamp or timestamp at local.
    
    Overrides:
    
    currentTimestamp in class Dialect
  - currentLocalTime
```
public String currentLocalTime()
```
    Description copied from class: Dialect
    
    Translation of the HQL local_time function, which maps to the Java type java.time.LocalTime which is a time with no time zone. It should usually be the same SQL function as for Dialect.currentTime().
    It is recommended to override this in dialects for databases which support localtime or current_time at local.
    
    Overrides:
    
    currentLocalTime in class Dialect
  - currentLocalTimestamp
```
public String currentLocalTimestamp()
```
    Description copied from class: Dialect
    
    Translation of the HQL local_datetime function, which maps to the Java type java.time.LocalDateTime which is a datetime with no time zone. It should usually be the same SQL function as for Dialect.currentTimestamp().
    It is recommended to override this in dialects for databases which support localtimestamp or current_timestamp at local.
    
    Overrides:
    
    currentLocalTimestamp in class Dialect
  - currentTimestampWithTimeZone
```
public String currentTimestampWithTimeZone()
```
    Description copied from class: Dialect
    
    Translation of the HQL offset_datetime function, which maps to the Java type java.time.OffsetDateTime which is a datetime with a time zone. This in principle correctly maps to the ANSI SQL current_timestamp which has the type TIMESTAMP WITH TIME ZONE.
    
    Overrides:
    
    currentTimestampWithTimeZone in class Dialect
  - castPattern
```
public String castPattern(CastType from,
                          CastType to)
```
    Oracle doesn't have any sort of Types.BOOLEAN type or Types.TIME type, and its default behavior for casting dates and timestamps to and from strings is just awful.
    
    Overrides:
    
    castPattern in class Dialect
    
    Parameters:
    
    from - a CastType indicating the type of the value argument
    
    to - a CastType indicating the type the value argument is cast to
  - getFractionalSecondPrecisionInNanos
```
public long getFractionalSecondPrecisionInNanos()
```
    We minimize multiplicative factors by using seconds (with fractional part) as the "native" precision for duration arithmetic.
    
    Overrides:
    
    getFractionalSecondPrecisionInNanos in class Dialect
    
    Returns:
    
    the precision, specified as a quantity of nanoseconds
    
    See Also:
    
    TemporalUnit.NATIVE
  - extractPattern
```
public String extractPattern(TemporalUnit unit)
```
    Oracle supports a limited list of temporal fields in the extract() function, but we can emulate some of them by using to_char() with a format string instead of extract(). Thus, the additional supported fields are TemporalUnit.DAY_OF_YEAR, TemporalUnit.DAY_OF_MONTH, TemporalUnit.DAY_OF_YEAR, and TemporalUnit.WEEK.
    
    Overrides:
    
    extractPattern in class Dialect
    
    Parameters:
    
    unit - the first argument
  - timestampaddPattern
```
public String timestampaddPattern(TemporalUnit unit,
                                  TemporalType temporalType,
                                  IntervalType intervalType)
```
    Description copied from class: Dialect
    
    Obtain a pattern for the SQL equivalent to a timestampadd() function call. The resulting pattern must contain ?1, ?2, and ?3 placeholders for the arguments.
    
    Overrides:
    
    timestampaddPattern in class Dialect
    
    Parameters:
    
    unit - The unit to add to the temporal
    
    temporalType - The type of the temporal
    
    intervalType - The type of interval to add or null if it's not a native interval
  - timestampdiffPattern
```
public String timestampdiffPattern(TemporalUnit unit,
                                   TemporalType fromTemporalType,
                                   TemporalType toTemporalType)
```
    Description copied from class: Dialect
    
    Obtain a pattern for the SQL equivalent to a timestampdiff() function call. The resulting pattern must contain ?1, ?2, and ?3 placeholders for the arguments.
    
    Overrides:
    
    timestampdiffPattern in class Dialect
    
    Parameters:
    
    unit - the first argument
    
    fromTemporalType - true if the first argument is a timestamp, false if a date
    
    toTemporalType - true if the second argument is
  - columnType
```
protected String columnType(int sqlTypeCode)
```
    Description copied from class: Dialect
    
    The column type name for a given JDBC type code defined in Types or SqlTypes. This default implementation returns the ANSI-standard type name.
    This method may be overridden by concrete Dialects as an alternative to Dialect.registerColumnTypes(TypeContributions, ServiceRegistry) for simple registrations.
    
    Overrides:
    
    columnType in class Dialect
    
    Parameters:
    
    sqlTypeCode - a SQL type code
    
    Returns:
    
    a column type name, with $l, $p, $s placeholders for length, precision, scale
    
    See Also:
    
    SqlTypes
  - registerColumnTypes
```
protected void registerColumnTypes(TypeContributions typeContributions,
                                   ServiceRegistry serviceRegistry)
```
    Description copied from class: Dialect
    
    Register ANSI-standard column types using the length limits defined by Dialect.getMaxVarcharLength(), Dialect.getMaxNVarcharLength(), and Dialect.getMaxVarbinaryLength().
    This method is always called when a Dialect is instantiated.
    
    Overrides:
    
    registerColumnTypes in class Dialect
  - getTimeZoneSupport
```
public TimeZoneSupport getTimeZoneSupport()
```
    Description copied from class: Dialect
    
    How the Dialect supports time zone types like Types.TIMESTAMP_WITH_TIMEZONE.
    
    Overrides:
    
    getTimeZoneSupport in class Dialect
  - initDefaultProperties
```
protected void initDefaultProperties()
```
    Description copied from class: Dialect
    
    Set appropriate default values for configuration properties.
    
    Overrides:
    
    initDefaultProperties in class Dialect
  - getDefaultStatementBatchSize
```
public int getDefaultStatementBatchSize()
```
    Description copied from class: Dialect
    
    The default value to use for the configuration property "hibernate.jdbc.batch_size".
    
    Overrides:
    
    getDefaultStatementBatchSize in class Dialect
  - getDefaultUseGetGeneratedKeys
```
public boolean getDefaultUseGetGeneratedKeys()
```
    Description copied from class: Dialect
    
    The default value to use for the configuration property "hibernate.jdbc.use_get_generated_keys".
    
    Overrides:
    
    getDefaultUseGetGeneratedKeys in class Dialect
  - resolveSqlTypeDescriptor
```
public JdbcType resolveSqlTypeDescriptor(String columnTypeName,
                                         int jdbcTypeCode,
                                         int precision,
                                         int scale,
                                         JdbcTypeRegistry jdbcTypeRegistry)
```
    Overrides:
    
    resolveSqlTypeDescriptor in class Dialect
  - supportsBitType
```
public boolean supportsBitType()
```
    Oracle has neither BIT nor BOOLEAN.
    
    Overrides:
    
    supportsBitType in class Dialect
    
    Returns:
    
    false
  - getArrayTypeName
```
public String getArrayTypeName(String elementTypeName)
```
    Description copied from class: Dialect
    
    The SQL type name for the array of the given type name.
    
    Overrides:
    
    getArrayTypeName in class Dialect
  - getPreferredSqlTypeCodeForArray
```
public int getPreferredSqlTypeCodeForArray()
```
    Description copied from class: Dialect
    
    The JDBC type code to use for mapping properties of basic Java array or Collection types.
    Usually SqlTypes.ARRAY or SqlTypes.VARBINARY.
    
    Overrides:
    
    getPreferredSqlTypeCodeForArray in class Dialect
    
    Returns:
    
    one of the type codes defined by SqlTypes.
  - contributeTypes
```
public void contributeTypes(TypeContributions typeContributions,
                            ServiceRegistry serviceRegistry)
```
    Description copied from class: Dialect
    
    Allows the Dialect to contribute additional types
    
    Overrides:
    
    contributeTypes in class Dialect
    
    Parameters:
    
    typeContributions - Callback to contribute the types
    
    serviceRegistry - The service registry
  - getNativeIdentifierGeneratorStrategy
```
public String getNativeIdentifierGeneratorStrategy()
```
    Description copied from class: Dialect
    
    Resolves the native generation strategy associated to this dialect.
    Comes into play whenever the user specifies the native generator.
    
    Overrides:
    
    getNativeIdentifierGeneratorStrategy in class Dialect
    
    Returns:
    
    The native generator strategy.
  - getIdentityColumnSupport
```
public IdentityColumnSupport getIdentityColumnSupport()
```
    Description copied from class: Dialect
    
    Get the appropriate IdentityColumnSupport
    
    Overrides:
    
    getIdentityColumnSupport in class Dialect
    
    Returns:
    
    the IdentityColumnSupport
  - getLimitHandler
```
public LimitHandler getLimitHandler()
```
    Description copied from class: Dialect
    
    Returns a LimitHandler that implements support for Query.setMaxResults(int) and Query.setFirstResult(int) for this dialect.
    
    Overrides:
    
    getLimitHandler in class Dialect
  - getSelectClauseNullString
```
public String getSelectClauseNullString(int sqlType,
                                        TypeConfiguration typeConfiguration)
```
    Description copied from class: Dialect
    
    Given a Types type code, determine an appropriate null value to use in a select clause.
    One thing to consider here is that certain databases might require proper casting for the nulls here since the select here will be part of a UNION/UNION ALL.
    
    Overrides:
    
    getSelectClauseNullString in class Dialect
    
    Parameters:
    
    sqlType - The Types type code.
    
    typeConfiguration - The type configuration
    
    Returns:
    
    The appropriate select clause value fragment.
  - getCurrentTimestampSelectString
```
public String getCurrentTimestampSelectString()
```
    Description copied from class: Dialect
    
    Retrieve the command used to retrieve the current timestamp from the database.
    
    Overrides:
    
    getCurrentTimestampSelectString in class Dialect
    
    Returns:
    
    The command.
  - getAddColumnString
```
public String getAddColumnString()
```
    Description copied from class: Dialect
    
    The syntax used to add a column to a table (optional).
    
    Overrides:
    
    getAddColumnString in class Dialect
    
    Returns:
    
    The "add column" fragment.
  - getCascadeConstraintsString
```
public String getCascadeConstraintsString()
```
    Description copied from class: Dialect
    
    The keyword that specifies that a drop table operation should be cascaded to its constraints, typically " cascade" where the leading space is required, or the empty string if there is no such keyword in this dialect.
    
    Overrides:
    
    getCascadeConstraintsString in class Dialect
    
    Returns:
    
    The cascade drop keyword, if any, with a leading space
  - 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 Dialect
    
    Returns:
    
    True if constraints must be dropped prior to dropping the table; false otherwise.
  - getSequenceSupport
```
public SequenceSupport getSequenceSupport()
```
    Overrides:
    
    getSequenceSupport in class Dialect
  - getQuerySequencesString
```
public String getQuerySequencesString()
```
    Description copied from class: Dialect
    
    Get the select command used retrieve the names of all sequences.
    
    Overrides:
    
    getQuerySequencesString in class Dialect
    
    Returns:
    
    The select command; or null if sequences are not supported.
  - getSequenceInformationExtractor
```
public SequenceInformationExtractor getSequenceInformationExtractor()
```
    Description copied from class: Dialect
    
    A source of SequenceInformation.
    
    Overrides:
    
    getSequenceInformationExtractor in class Dialect
  - getSelectGUIDString
```
public String getSelectGUIDString()
```
    Description copied from class: Dialect
    
    Get the command used to select a GUID from the underlying database.
    Optional operation.
    
    Overrides:
    
    getSelectGUIDString in class Dialect
    
    Returns:
    
    The appropriate command.
  - getViolatedConstraintNameExtractor
```
public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor()
```
    Specified by:
    
    getViolatedConstraintNameExtractor in interface ConversionContext
    
    Overrides:
    
    getViolatedConstraintNameExtractor in class Dialect
  - buildSQLExceptionConversionDelegate
```
public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate()
```
    Description copied from class: Dialect
    Build an instance of a SQLExceptionConversionDelegate for interpreting dialect-specific error or SQLState codes.
    If this method is overridden to return a non-null value, the default SQLExceptionConverter will use the returned SQLExceptionConversionDelegate in addition to the following standard delegates:
    
    a "static" delegate based on the JDBC 4 defined SQLException hierarchy;
    
    a delegate that interprets SQLState codes for either X/Open or SQL-2003 codes, depending on java.sql.DatabaseMetaData#getSQLStateType
    
    It is strongly recommended that specific Dialect implementations override this method, since interpretation of a SQL error is much more accurate when based on the vendor-specific ErrorCode rather than the SQLState.
    Specific Dialects may override to return whatever is most appropriate for that vendor.
    Overrides:
    
    buildSQLExceptionConversionDelegate in class Dialect
    
    Returns:
    
    The SQLExceptionConversionDelegate for this dialect
  - registerResultSetOutParameter
```
public int registerResultSetOutParameter(CallableStatement statement,
                                         int col)
                                  throws SQLException
```
    Description copied from class: Dialect
    
    Registers a parameter (either OUT, or the new REF_CURSOR param type available in Java 8) capable of returning ResultSet *by position*. Pre-Java 8, registering such ResultSet-returning parameters varied greatly across database and drivers; hence its inclusion as part of the Dialect contract.
    
    Overrides:
    
    registerResultSetOutParameter in class Dialect
    
    Parameters:
    
    statement - The callable statement.
    
    col - The bind position at which to register the output param.
    
    Returns:
    
    The number of (contiguous) bind positions used.
    
    Throws:
    
    SQLException - Indicates problems registering the param.
  - getResultSet
```
public ResultSet getResultSet(CallableStatement ps)
                       throws SQLException
```
    Description copied from class: Dialect
    
    Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the OUT parameter.
    
    Overrides:
    
    getResultSet in class Dialect
    
    Parameters:
    
    ps - The callable statement.
    
    Returns:
    
    The extracted result set.
    
    Throws:
    
    SQLException - Indicates problems extracting the result set.
  - supportsCommentOn
```
public boolean supportsCommentOn()
```
    Description copied from class: Dialect
    
    Does this dialect/database support commenting on tables, columns, etc?
    
    Overrides:
    
    supportsCommentOn in class Dialect
    
    Returns:
    
    true if commenting is supported
  - supportsCurrentTimestampSelection
```
public boolean supportsCurrentTimestampSelection()
```
    Description copied from class: Dialect
    
    Does this dialect support a way to retrieve the database's current timestamp value?
    
    Overrides:
    
    supportsCurrentTimestampSelection in class Dialect
    
    Returns:
    
    True if the current timestamp can be retrieved; false otherwise.
  - isCurrentTimestampSelectStringCallable
```
public boolean isCurrentTimestampSelectStringCallable()
```
    Description copied from class: Dialect
    
    Should the value returned by Dialect.getCurrentTimestampSelectString() be treated as callable. Typically this indicates that JDBC escape syntax is being used...
    
    Overrides:
    
    isCurrentTimestampSelectStringCallable in class Dialect
    
    Returns:
    
    True if the Dialect.getCurrentTimestampSelectString() return is callable; false otherwise.
  - supportsExistsInSelect
```
public boolean supportsExistsInSelect()
```
    Description copied from class: Dialect
    
    Does the dialect support an exists statement in the select clause?
    
    Overrides:
    
    supportsExistsInSelect in class Dialect
    
    Returns:
    
    True if exists checks are allowed in the select clause; false otherwise.
  - getInExpressionCountLimit
```
public int getInExpressionCountLimit()
```
    Description copied from class: Dialect
    
    Return the limit that the underlying database places on the number of elements in an IN predicate. If the database defines no such limits, simply return zero or less-than-zero.
    
    Overrides:
    
    getInExpressionCountLimit in class Dialect
    
    Returns:
    
    int The limit, or zero-or-less to indicate no limit.
  - forceLobAsLastValue
```
public boolean forceLobAsLastValue()
```
    Description copied from class: Dialect
    
    HHH-4635 Oracle expects all Lob values to be last in inserts and updates.
    
    Overrides:
    
    forceLobAsLastValue in class Dialect
    
    Returns:
    
    boolean True if Lob values should be last, false if it does not matter.
  - isEmptyStringTreatedAsNull
```
public boolean isEmptyStringTreatedAsNull()
```
    Description copied from class: Dialect
    
    Return whether the dialect considers an empty-string value as null.
    
    Overrides:
    
    isEmptyStringTreatedAsNull in class Dialect
    
    Returns:
    
    boolean True if an empty string is treated as null, false otherwise.
  - getFallbackSqmMutationStrategy
```
public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(EntityMappingType rootEntityDescriptor,
                                                                    RuntimeModelCreationContext runtimeModelCreationContext)
```
    Overrides:
    
    getFallbackSqmMutationStrategy in class Dialect
  - getFallbackSqmInsertStrategy
```
public SqmMultiTableInsertStrategy getFallbackSqmInsertStrategy(EntityMappingType rootEntityDescriptor,
                                                                RuntimeModelCreationContext runtimeModelCreationContext)
```
    Overrides:
    
    getFallbackSqmInsertStrategy in class Dialect
  - getSupportedTemporaryTableKind
```
public TemporaryTableKind getSupportedTemporaryTableKind()
```
    Overrides:
    
    getSupportedTemporaryTableKind in class Dialect
  - getTemporaryTableCreateOptions
```
public String getTemporaryTableCreateOptions()
```
    Overrides:
    
    getTemporaryTableCreateOptions in class Dialect
  - useFollowOnLocking
```
public boolean useFollowOnLocking(String sql,
                                  QueryOptions queryOptions)
```
    For Oracle, the FOR UPDATE clause cannot be applied when using ORDER BY, DISTINCT or views.
    
    Overrides:
    
    useFollowOnLocking in class Dialect
    
    Returns:
    
    true indicates that the dialect requests that locking be applied by subsequent select; false (the default) indicates that locking should be applied to the main SQL statement..
    
    See Also:
    
    Oracle FOR UPDATE restrictions
  - getQueryHintString
```
public String getQueryHintString(String sql,
                                 String hints)
```
    Description copied from class: Dialect
    
    Apply a hint to the query. The entire query is provided, allowing the Dialect full control over the placement and syntax of the hint. By default, ignore the hint and simply return the query.
    
    Overrides:
    
    getQueryHintString in class Dialect
    
    Parameters:
    
    sql - The query to which to apply the hint.
    
    hints - The hints to apply
    
    Returns:
    
    The modified SQL
  - getMaxAliasLength
```
public int getMaxAliasLength()
```
    Description copied from class: Dialect
    
    What is the maximum length Hibernate can use for generated aliases?
    The maximum here should account for the fact that Hibernate often needs to append "uniqueing" information to the end of generated aliases. That "uniqueing" information will be added to the end of a identifier generated to the length specified here; so be sure to leave some room (generally speaking 5 positions will suffice).
    
    Overrides:
    
    getMaxAliasLength in class Dialect
    
    Returns:
    
    The maximum length.
  - getMaxIdentifierLength
```
public int getMaxIdentifierLength()
```
    Description copied from class: Dialect
    
    What is the maximum identifier length supported by the dialect?
    
    Overrides:
    
    getMaxIdentifierLength in class Dialect
    
    Returns:
    
    The maximum length.
  - getCallableStatementSupport
```
public CallableStatementSupport getCallableStatementSupport()
```
    Overrides:
    
    getCallableStatementSupport in class Dialect
  - canCreateSchema
```
public boolean canCreateSchema()
```
    Description copied from class: Dialect
    
    Does this dialect support schema creation?
    
    Overrides:
    
    canCreateSchema in class Dialect
    
    Returns:
    
    True if the dialect supports schema creation; false otherwise.
  - getCurrentSchemaCommand
```
public String getCurrentSchemaCommand()
```
    Description copied from class: Dialect
    
    Get the SQL command used to retrieve the current schema name. Works in conjunction with Dialect.getSchemaNameResolver(), unless the return from there does not need this information. E.g., a custom impl might make use of the Java 1.7 addition of the Connection.getSchema() method
    
    Overrides:
    
    getCurrentSchemaCommand in class Dialect
    
    Returns:
    
    The current schema retrieval SQL
  - supportsPartitionBy
```
public boolean supportsPartitionBy()
```
    Description copied from class: Dialect
    
    Does the underlying database support partition by?
    
    Overrides:
    
    supportsPartitionBy in class Dialect
  - supportsTupleDistinctCounts
```
public boolean supportsTupleDistinctCounts()
```
    Description copied from class: Dialect
    
    Does this dialect support `count(distinct a,b)`?
    
    Overrides:
    
    supportsTupleDistinctCounts in class Dialect
    
    Returns:
    
    True if the database supports counting distinct tuples; false otherwise.
  - supportsOffsetInSubquery
```
public boolean supportsOffsetInSubquery()
```
    Description copied from class: Dialect
    
    Does this dialect support offset in subqueries? Ex: select * from Table1 where col1 in (select col1 from Table2 order by col2 limit 1 offset 1)
    
    Overrides:
    
    supportsOffsetInSubquery in class Dialect
    
    Returns:
    
    boolean
  - supportsFetchClause
```
public boolean supportsFetchClause(FetchClauseType type)
```
    Description copied from class: Dialect
    
    Does this dialect support the given fetch clause type.
    
    Overrides:
    
    supportsFetchClause in class Dialect
    
    Parameters:
    
    type - The fetch clause type
    
    Returns:
    
    true if the underlying database supports the given fetch clause type, false otherwise. The default is false.
  - supportsWindowFunctions
```
public boolean supportsWindowFunctions()
```
    Description copied from class: Dialect
    
    Does this dialect support window functions like row_number() over (..)?
    
    Overrides:
    
    supportsWindowFunctions in class Dialect
    
    Returns:
    
    true if the underlying database supports window functions, false otherwise. The default is false.
  - supportsLateral
```
public boolean supportsLateral()
```
    Description copied from class: Dialect
    
    Does this dialect support the SQL lateral keyword or a proprietary alternative?
    
    Overrides:
    
    supportsLateral in class Dialect
    
    Returns:
    
    true if the underlying database supports lateral, false otherwise. The default is false.
  - supportsNoWait
```
public boolean supportsNoWait()
```
    Description copied from class: Dialect
    
    Does this dialect/database support NO_WAIT timeout.
    
    Overrides:
    
    supportsNoWait in class Dialect
    
    Returns:
    
    true if NO_WAIT is supported
  - supportsSkipLocked
```
public boolean supportsSkipLocked()
```
    Description copied from class: Dialect
    
    Does this dialect/database support SKIP_LOCKED timeout.
    
    Overrides:
    
    supportsSkipLocked in class Dialect
    
    Returns:
    
    true if SKIP_LOCKED is supported
  - getWriteRowLockStrategy
```
public RowLockStrategy getWriteRowLockStrategy()
```
    Description copied from class: Dialect
    
    The row lock strategy to use for write locks.
    
    Overrides:
    
    getWriteRowLockStrategy in class Dialect
  - getForUpdateNowaitString
```
public String getForUpdateNowaitString()
```
    Description copied from class: Dialect
    
    Retrieves the FOR UPDATE NOWAIT syntax specific to this dialect.
    
    Overrides:
    
    getForUpdateNowaitString in class Dialect
    
    Returns:
    
    The appropriate FOR UPDATE NOWAIT clause string.
  - getForUpdateString
```
public String getForUpdateString(String aliases)
```
    Description copied from class: Dialect
    
    Get the FOR UPDATE OF column_list fragment appropriate for this dialect given the aliases of the columns to be write locked.
    
    Overrides:
    
    getForUpdateString in class Dialect
    
    Parameters:
    
    aliases - The columns to be write locked.
    
    Returns:
    
    The appropriate FOR UPDATE OF column_list clause string.
  - getForUpdateNowaitString
```
public String getForUpdateNowaitString(String aliases)
```
    Description copied from class: Dialect
    
    Get the FOR UPDATE OF column_list NOWAIT fragment appropriate for this dialect given the aliases of the columns to be write locked.
    
    Overrides:
    
    getForUpdateNowaitString in class Dialect
    
    Parameters:
    
    aliases - The columns to be write locked.
    
    Returns:
    
    The appropriate FOR UPDATE OF colunm_list NOWAIT clause string.
  - getForUpdateSkipLockedString
```
public String getForUpdateSkipLockedString()
```
    Description copied from class: Dialect
    
    Retrieves the FOR UPDATE SKIP LOCKED syntax specific to this dialect.
    
    Overrides:
    
    getForUpdateSkipLockedString in class Dialect
    
    Returns:
    
    The appropriate FOR UPDATE SKIP LOCKED clause string.
  - getForUpdateSkipLockedString
```
public String getForUpdateSkipLockedString(String aliases)
```
    Description copied from class: Dialect
    
    Get the FOR UPDATE OF column_list SKIP LOCKED fragment appropriate for this dialect given the aliases of the columns to be write locked.
    
    Overrides:
    
    getForUpdateSkipLockedString in class Dialect
    
    Parameters:
    
    aliases - The columns to be write locked.
    
    Returns:
    
    The appropriate FOR UPDATE colunm_list SKIP LOCKED clause string.
  - getWriteLockString
```
public String getWriteLockString(int timeout)
```
    Description copied from class: Dialect
    
    Get the string to append to SELECT statements to acquire WRITE locks for this dialect. Location of the returned string is treated the same as getForUpdateString.
    
    Overrides:
    
    getWriteLockString in class Dialect
    
    Parameters:
    
    timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
    
    Returns:
    
    The appropriate LOCK clause string.
  - getWriteLockString
```
public String getWriteLockString(String aliases,
                                 int timeout)
```
    Description copied from class: Dialect
    
    Get the string to append to SELECT statements to acquire WRITE locks for this dialect given the aliases of the columns to be write locked. Location of the of the returned string is treated the same as getForUpdateString.
    
    Overrides:
    
    getWriteLockString in class Dialect
    
    Parameters:
    
    aliases - The columns to be read locked.
    
    timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
    
    Returns:
    
    The appropriate LOCK clause string.
  - getReadLockString
```
public String getReadLockString(int timeout)
```
    Description copied from class: Dialect
    
    Get the string to append to SELECT statements to acquire READ locks for this dialect. Location of the returned string is treated the same as getForUpdateString.
    
    Overrides:
    
    getReadLockString in class Dialect
    
    Parameters:
    
    timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
    
    Returns:
    
    The appropriate LOCK clause string.
  - getReadLockString
```
public String getReadLockString(String aliases,
                                int timeout)
```
    Description copied from class: Dialect
    
    Get the string to append to SELECT statements to acquire READ locks for this dialect given the aliases of the columns to be read locked. Location of the returned string is treated the same as getForUpdateString.
    
    Overrides:
    
    getReadLockString in class Dialect
    
    Parameters:
    
    aliases - The columns to be read locked.
    
    timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
    
    Returns:
    
    The appropriate LOCK clause string.
  - appendDatetimeFormat
```
public void appendDatetimeFormat(SqlAppender appender,
                                 String format)
```
    Description copied from class: Dialect
    Translate the given datetime format string from the pattern language defined by Java's DateTimeFormatter to whatever pattern language is understood by the native datetime formatting function for this database (often the to_char() function).
    Since it's never possible to translate all of the pattern letter sequences understood by DateTimeFormatter, only the following subset of pattern letters is accepted by Hibernate:
    
    G: era
    
    y: year of era
    
    Y: year of week-based year
    
    M: month of year
    
    w: week of week-based year (ISO week number)
    
    W: week of month
    
    E: day of week (name)
    
    e: day of week (number)
    
    d: day of month
    
    D: day of year
    
    a: AM/PM
    
    H: hour of day (24 hour time)
    
    h: hour of AM/PM (12 hour time)
    
    m: minutes
    
    s: seconds
    
    z,Z,x: timezone offset
    
    In addition, punctuation characters and single-quoted literal strings are accepted.
    Appends a pattern accepted by the function that formats dates and times in this dialect to a SQL fragment that is being constructed.
    Overrides:
    
    appendDatetimeFormat in class Dialect
  - datetimeFormat
```
public static Replacer datetimeFormat(String format,
                                      boolean useFm,
                                      boolean resetFm)
```
  - appendBinaryLiteral
```
public void appendBinaryLiteral(SqlAppender appender,
                                byte[] bytes)
```
    Overrides:
    
    appendBinaryLiteral in class Dialect
  - getResultSet
```
public ResultSet getResultSet(CallableStatement statement,
                              int position)
                       throws SQLException
```
    Description copied from class: Dialect
    
    Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet.
    
    Overrides:
    
    getResultSet in class Dialect
    
    Parameters:
    
    statement - The callable statement.
    
    position - The bind position at which to register the output param.
    
    Returns:
    
    The extracted result set.
    
    Throws:
    
    SQLException - Indicates problems extracting the result set.
  - registerResultSetOutParameter
```
public int registerResultSetOutParameter(CallableStatement statement,
                                         String name)
                                  throws SQLException
```
    Description copied from class: Dialect
    
    Registers a parameter (either OUT, or the new REF_CURSOR param type available in Java 8) capable of returning ResultSet *by name*. Pre-Java 8, registering such ResultSet-returning parameters varied greatly across database and drivers; hence its inclusion as part of the Dialect contract.
    
    Overrides:
    
    registerResultSetOutParameter in class Dialect
    
    Parameters:
    
    statement - The callable statement.
    
    name - The parameter name (for drivers which support named parameters).
    
    Returns:
    
    The number of (contiguous) bind positions used.
    
    Throws:
    
    SQLException - Indicates problems registering the param.
  - supportsNamedParameters
```
public boolean supportsNamedParameters(DatabaseMetaData databaseMetaData)
```
    Description copied from class: Dialect
    
    Override the DatabaseMetaData#supportsNamedParameters()
    
    Overrides:
    
    supportsNamedParameters in class Dialect
    
    Returns:
    
    boolean
  - getResultSet
```
public ResultSet getResultSet(CallableStatement statement,
                              String name)
                       throws SQLException
```
    Description copied from class: Dialect
    
    Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the OUT parameter.
    
    Overrides:
    
    getResultSet in class Dialect
    
    Parameters:
    
    statement - The callable statement.
    
    name - The parameter name (for drivers which support named parameters).
    
    Returns:
    
    The extracted result set.
    
    Throws:
    
    SQLException - Indicates problems extracting the result set.
  - generatedAs
```
public String generatedAs(String generatedAs)
```
    Overrides:
    
    generatedAs in class Dialect
  - buildIdentifierHelper
```
public IdentifierHelper buildIdentifierHelper(IdentifierHelperBuilder builder,
                                              DatabaseMetaData dbMetaData)
                                       throws SQLException
```
    Description copied from class: Dialect
    Build the IdentifierHelper indicated by this Dialect for handling identifier conversions. Returning null is allowed and indicates that Hibernate should fallback to building a "standard" helper. In the fallback path, any changes made to the IdentifierHelperBuilder during this call will still be incorporated into the built IdentifierHelper.
    The incoming builder will have the following set:
    
    IdentifierHelperBuilder.isGloballyQuoteIdentifiers()
    
    IdentifierHelperBuilder.getUnquotedCaseStrategy() - initialized to UPPER
    
    IdentifierHelperBuilder.getQuotedCaseStrategy() - initialized to MIXED
    
    By default Hibernate will do the following:
    
    Call IdentifierHelperBuilder.applyIdentifierCasing(DatabaseMetaData)
    Call IdentifierHelperBuilder.applyReservedWords(DatabaseMetaData)
    Applies AnsiSqlKeywords.sql2003() as reserved words
    
    Applies the {#link #sqlKeywords} collected here as reserved words
    
    Applies the Dialect's NameQualifierSupport, if it defines one
    Overrides:
    
    buildIdentifierHelper in class Dialect
    
    Parameters:
    
    builder - A semi-configured IdentifierHelper builder.
    
    dbMetaData - Access to the metadata returned from the driver if needed and if available. WARNING: may be null
    
    Returns:
    
    The IdentifierHelper instance to use, or null to indicate Hibernate should use its fallback path
    
    Throws:
    
    SQLException - Accessing the DatabaseMetaData can throw it. Just re-throw and Hibernate will handle.
    
    See Also:
    
    Dialect.getNameQualifierSupport()

Constructor	Description
`OracleDialect()`
`OracleDialect(DatabaseVersion version)`
`OracleDialect(DialectResolutionInfo info)`

Class OracleDialect

Nested Class Summary

Nested classes/interfaces inherited from class org.hibernate.dialect.Dialect

Field Summary

Fields inherited from class org.hibernate.dialect.Dialect

Constructor Summary

Method Summary

Methods inherited from class org.hibernate.dialect.Dialect

Methods inherited from class java.lang.Object

Field Detail

PREFER_LONG_RAW

Constructor Detail

OracleDialect

OracleDialect

OracleDialect

Method Detail

getPreferredSqlTypeCodeForBoolean

initializeFunctionRegistry

getMaxVarcharLength

getMaxVarbinaryLength

getSqlAstTranslatorFactory

currentDate

currentTime

currentTimestamp

currentLocalTime

currentLocalTimestamp

currentTimestampWithTimeZone

castPattern

getFractionalSecondPrecisionInNanos

extractPattern

timestampaddPattern

timestampdiffPattern

columnType

registerColumnTypes

getTimeZoneSupport

initDefaultProperties

getDefaultStatementBatchSize

getDefaultUseGetGeneratedKeys

resolveSqlTypeDescriptor

supportsBitType

getArrayTypeName

getPreferredSqlTypeCodeForArray

contributeTypes

getNativeIdentifierGeneratorStrategy

getIdentityColumnSupport

getLimitHandler

getSelectClauseNullString

getCurrentTimestampSelectString

getAddColumnString

getCascadeConstraintsString

dropConstraints

getSequenceSupport

getQuerySequencesString

getSequenceInformationExtractor

getSelectGUIDString

getViolatedConstraintNameExtractor

buildSQLExceptionConversionDelegate

registerResultSetOutParameter

getResultSet

supportsCommentOn

supportsCurrentTimestampSelection

isCurrentTimestampSelectStringCallable

supportsExistsInSelect

getInExpressionCountLimit

forceLobAsLastValue

isEmptyStringTreatedAsNull

getFallbackSqmMutationStrategy

getFallbackSqmInsertStrategy

getSupportedTemporaryTableKind

getTemporaryTableCreateOptions

useFollowOnLocking

getQueryHintString

getMaxAliasLength

getMaxIdentifierLength

getCallableStatementSupport

canCreateSchema

getCurrentSchemaCommand

supportsPartitionBy

supportsTupleDistinctCounts

supportsOffsetInSubquery