HSQLDialect (Hibernate JavaDocs)

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

All Implemented Interfaces:

ConversionContext
```
public class HSQLDialect
extends Dialect
```
An SQL dialect compatible with HSQLDB (HyperSQL).
Note this version supports HSQLDB version 1.8 and higher, only.
Enhancements to version 3.5.0 GA to provide basic support for both HSQLDB 1.8.x and 2.x Does not works with Hibernate 3.2 - 3.4 without alteration.

Field Summary
- Fields inherited from class org.hibernate.dialect.Dialect
  CLOSED_QUOTE, DEFAULT_BATCH_SIZE, LEGACY_LOB_MERGE_STRATEGY, NEW_LOCATOR_LOB_MERGE_STRATEGY, NO_BATCH, QUOTE, STREAM_XFER_LOB_MERGE_STRATEGY

Constructor Summary

Constructors
Constructor and Description

HSQLDialect()
Constructs a HSQLDialect

Constructors
Constructor and Description
`HSQLDialect()` Constructs a HSQLDialect

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`bindLimitParametersFirst()` Does the `LIMIT` clause come at the start of the `SELECT` statement, rather than at the end?
`boolean`	`doesReadCommittedCauseWritersToBlockReaders()` For the underlying database, is READ_COMMITTED isolation implemented by forcing readers to wait for write locks to be released?
`boolean`	`doesRepeatableReadCauseReadersToBlockWriters()` For the underlying database, is REPEATABLE_READ isolation implemented by forcing writers to wait for read locks to be released?
`boolean`	`dropTemporaryTableAfterUse()` Do we need to drop the temporary table after use?
`String`	`generateTemporaryTableName(String baseTableName)` Generate a temporary table name given the base table.
`String`	`getAddColumnString()` The syntax used to add a column to a table (optional).
`protected String`	`getCreateSequenceString(String sequenceName)` HSQL will start with 0, by default.
`protected String`	`getCreateSequenceString(String sequenceName, int initialValue, int incrementSize)` Because of the overridden `getCreateSequenceString(String)`, we must also override `getCreateSequenceString(String, int, int)` to prevent 2 instances of "start with".
`String`	`getCreateTemporaryTablePostfix()` Get any fragments needing to be postfixed to the command for temporary table creation.
`String`	`getCreateTemporaryTableString()` Command used to create a temporary table.
`String`	`getCurrentTimestampSelectString()` Retrieve the command used to retrieve the current timestamp from the database.
`String`	`getCurrentTimestampSQLFunctionName()` The name of the database-specific SQL function for retrieving the current timestamp.
`protected String`	`getDropSequenceString(String sequenceName)` Typically dialects which support sequences can drop a sequence with a single command.
`String`	`getDropTemporaryTableString()` Command used to drop a temporary table.
`String`	`getForUpdateString()` Get the string to append to SELECT statements to acquire locks for this dialect.
`String`	`getIdentityColumnString()` The syntax used during DDL to define a column as being an IDENTITY.
`String`	`getIdentityInsertString()` The keyword used to insert a generated value into an identity column (or null).
`String`	`getIdentitySelectString()` Get the select command to use to retrieve the last generated IDENTITY value.
`String`	`getLimitString(String sql, boolean hasOffset)` Apply s limit clause to the query.
`LockingStrategy`	`getLockingStrategy(Lockable lockable, LockMode lockMode)` For HSQLDB 2.0, this is a copy of the base class implementation.
`String`	`getQuerySequencesString()` Get the select command used retrieve the names of all sequences.
`String`	`getSelectClauseNullString(int sqlType)` Given a `Types` type code, determine an appropriate null value to use in a select clause.
`String`	`getSelectSequenceNextValString(String sequenceName)` Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.
`String`	`getSequenceNextValString(String sequenceName)` Generate the appropriate select statement to to retrieve the next value of a sequence.
`ViolatedConstraintNameExtracter`	`getViolatedConstraintNameExtracter()`
`boolean`	`isCurrentTimestampSelectStringCallable()` Should the value returned by `Dialect.getCurrentTimestampSelectString()` be treated as callable.
`Boolean`	`performTemporaryTableDDLInIsolation()` Does the dialect require that temporary table DDL statements occur in isolation from other statements? This would be the case if the creation would cause any current transaction to get committed implicitly.
`boolean`	`requiresCastingOfParametersInSelectClause()` Does this dialect require that parameters appearing in the `SELECT` clause be wrapped in `cast()` calls to tell the db parser the expected type.
`boolean`	`supportsColumnCheck()` Does this dialect support column-level check constraints?
`boolean`	`supportsCommentOn()` Does this dialect/database support commenting on tables, columns, etc?
`boolean`	`supportsCurrentTimestampSelection()` HSQLDB 1.8.x requires CALL CURRENT_TIMESTAMP but this should not be treated as a callable statement.
`boolean`	`supportsEmptyInList()` Does this dialect support empty IN lists? For example, is [where XYZ in ()] a supported construct?
`boolean`	`supportsIdentityColumns()` Does this dialect support identity column key generation?
`boolean`	`supportsIfExistsAfterTableName()` For dropping a table, can the phrase "if exists" be applied after the table name? NOTE : Only one or the other (or neither) of this and `Dialect.supportsIfExistsBeforeTableName()` should return true
`boolean`	`supportsLimit()` Does this dialect support some form of limiting query results via a SQL clause?
`boolean`	`supportsLobValueChangePropogation()` Does the dialect support propagating 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...
`boolean`	`supportsLockTimeouts()` Informational metadata about whether this dialect is known to support specifying timeouts for requested lock acquisitions.
`boolean`	`supportsPooledSequences()` Does this dialect support "pooled" sequences.
`boolean`	`supportsSequences()` Does this dialect support sequences?
`boolean`	`supportsTemporaryTables()` Does this dialect support temporary tables?
`boolean`	`supportsTupleDistinctCounts()` Does this dialect support `count(distinct a,b)`?
`boolean`	`supportsUnionAll()` Does this dialect support UNION ALL, which is generally a faster variant of UNION?
`String`	`toBooleanValueString(boolean bool)` The SQL literal value to which this database maps boolean values.

Methods inherited from class org.hibernate.dialect.Dialect
appendIdentitySelectToInsert, appendLockHint, appendLockHint, applyLocksToSql, areStringComparisonsCaseInsensitive, bindLimitParametersInReverseOrder, buildLimitHandler, buildSQLExceptionConversionDelegate, buildSQLExceptionConverter, cast, cast, cast, closeQuote, contributeTypes, convertToFirstRowValue, createCaseFragment, createOuterJoinFragment, defaultScrollMode, dropConstraints, forceLimitUsage, forceLobAsLastValue, forUpdateOfColumns, getAddColumnSuffixString, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getAddUniqueConstraintString, getCallableStatementSupport, getCascadeConstraintsString, getCaseInsensitiveLike, getCastTypeName, getColumnAliasExtractor, getColumnComment, getCreateMultisetTableString, getCreateSchemaCommand, getCreateSequenceStrings, getCreateSequenceStrings, getCreateTableString, getCrossJoinSeparator, getDefaultProperties, getDialect, getDialect, getDropForeignKeyString, getDropSchemaCommand, getDropSequenceStrings, getDropTableString, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateSkipLockedString, getForUpdateSkipLockedString, getForUpdateString, getForUpdateString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIdentityColumnString, getIdentitySelectString, getInExpressionCountLimit, getKeywords, getLimitString, getLobMergeStrategy, getLowercaseFunction, getMaxAliasLength, getNativeIdentifierGeneratorClass, getNoColumnsInsertString, getNotExpression, getNullColumnString, getQueryHintString, getReadLockString, getResultSet, getResultSet, getResultSet, getSelectGUIDString, getSqlTypeDescriptorOverride, getTableComment, getTableTypeString, getTypeName, getTypeName, getUniqueDelegate, getWriteLockString, hasAlterTable, hasDataTypeInIdentityColumn, hasSelfReferentialForeignKeyBug, isLockTimeoutParameterized, openQuote, qualifyIndexName, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, registerResultSetOutParameter, registerResultSetOutParameter, remapSqlTypeDescriptor, renderOrderByElement, replaceResultVariableInOrderByClauseWithPosition, requiresParensForTupleDistinctCounts, supportsBindAsCallableArgument, supportsCascadeDelete, supportsCaseInsensitiveLike, supportsCircularCascadeDeleteConstraints, supportsExistsInSelect, supportsExpectedLobUsagePattern, supportsIfExistsAfterConstraintName, supportsIfExistsBeforeConstraintName, supportsIfExistsBeforeTableName, supportsInsertSelectIdentity, supportsLimitOffset, supportsNotNullUnique, supportsOuterJoinForUpdate, supportsParametersInInsertSelect, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsRowValueConstructorSyntax, supportsRowValueConstructorSyntaxInInList, supportsSubqueryOnMutatingTable, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTupleCounts, supportsTuplesInSubqueries, supportsUnboundedLobLocatorMaterialization, supportsUnique, supportsUniqueConstraintInCreateAlterTable, supportsVariableLimit, toString, transformSelectString, useFollowOnLocking, useInputStreamToInsertBlob, useMaxForLimit

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

- Constructor Detail
  - HSQLDialect
```
public HSQLDialect()
```
    Constructs a HSQLDialect
- Method Detail
  - 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.
  - supportsIdentityColumns
```
public boolean supportsIdentityColumns()
```
    Description copied from class: Dialect
    
    Does this dialect support identity column key generation?
    
    Overrides:
    
    supportsIdentityColumns in class Dialect
    
    Returns:
    True if IDENTITY columns are supported; false otherwise.
  - getIdentityColumnString
```
public String getIdentityColumnString()
```
    Description copied from class: Dialect
    
    The syntax used during DDL to define a column as being an IDENTITY.
    
    Overrides:
    
    getIdentityColumnString in class Dialect
    
    Returns:
    The appropriate DDL fragment.
  - getIdentitySelectString
```
public String getIdentitySelectString()
```
    Description copied from class: Dialect
    
    Get the select command to use to retrieve the last generated IDENTITY value.
    
    Overrides:
    
    getIdentitySelectString in class Dialect
    
    Returns:
    The appropriate select command
  - getIdentityInsertString
```
public String getIdentityInsertString()
```
    Description copied from class: Dialect
    
    The keyword used to insert a generated value into an identity column (or null). Need if the dialect does not support inserts that specify no column values.
    
    Overrides:
    
    getIdentityInsertString in class Dialect
    
    Returns:
    The appropriate keyword.
  - supportsLockTimeouts
```
public boolean supportsLockTimeouts()
```
    Description copied from class: Dialect
    
    Informational metadata about whether this dialect is known to support specifying timeouts for requested lock acquisitions.
    
    Overrides:
    
    supportsLockTimeouts in class Dialect
    
    Returns:
    True is this dialect supports specifying lock timeouts.
  - getForUpdateString
```
public String getForUpdateString()
```
    Description copied from class: Dialect
    
    Get the string to append to SELECT statements to acquire locks for this dialect.
    
    Overrides:
    
    getForUpdateString in class Dialect
    
    Returns:
    The appropriate FOR UPDATE clause string.
  - 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 Dialect
    
    Returns:
    True if this dialect supports some form of LIMIT.
  - getLimitString
```
public String getLimitString(String sql,
                    boolean hasOffset)
```
    Description copied from class: Dialect
    
    Apply s limit clause to the query.
    Typically dialects utilize variable limit clauses when they support limits. Thus, when building the select command we do not actually need to know the limit or the offest since we will just be using placeholders.
    Here we do still pass along whether or not an offset was specified so that dialects not supporting offsets can generate proper exceptions. In general, dialects will override one or the other of this method and Dialect.getLimitString(String, int, int).
    
    Overrides:
    
    getLimitString in class Dialect
    
    Parameters:
    sql - The query to which to apply the limit.
    hasOffset - Is the query requesting an offset?
    
    Returns:
    the modified SQL
  - bindLimitParametersFirst
```
public boolean bindLimitParametersFirst()
```
    Description copied from class: Dialect
    
    Does the LIMIT clause come at the start of the SELECT statement, rather than at the end?
    
    Overrides:
    
    bindLimitParametersFirst in class Dialect
    
    Returns:
    true if limit parameters should come before other parameters
  - supportsIfExistsAfterTableName
```
public boolean supportsIfExistsAfterTableName()
```
    Description copied from class: Dialect
    
    For dropping a table, can the phrase "if exists" be applied after the table name?
    NOTE : Only one or the other (or neither) of this and Dialect.supportsIfExistsBeforeTableName() should return true
    
    Overrides:
    
    supportsIfExistsAfterTableName in class Dialect
    
    Returns:
    true if the "if exists" can be applied after the table name
  - supportsColumnCheck
```
public boolean supportsColumnCheck()
```
    Description copied from class: Dialect
    
    Does this dialect support column-level check constraints?
    
    Overrides:
    
    supportsColumnCheck in class Dialect
    
    Returns:
    True if column-level CHECK constraints are supported; false otherwise.
  - supportsSequences
```
public boolean supportsSequences()
```
    Description copied from class: Dialect
    
    Does this dialect support sequences?
    
    Overrides:
    
    supportsSequences in class Dialect
    
    Returns:
    True if sequences supported; false otherwise.
  - supportsPooledSequences
```
public boolean supportsPooledSequences()
```
    Description copied from class: Dialect
    
    Does this dialect support "pooled" sequences. Not aware of a better name for this. Essentially can we specify the initial and increment values?
    
    Overrides:
    
    supportsPooledSequences in class Dialect
    
    Returns:
    True if such "pooled" sequences are supported; false otherwise.
    See Also:
    Dialect.getCreateSequenceStrings(String, int, int), Dialect.getCreateSequenceString(String, int, int)
  - getCreateSequenceString
```
protected String getCreateSequenceString(String sequenceName)
```
    HSQL will start with 0, by default. In order for Hibernate to know that this not transient, manually start with 1.
    
    Overrides:
    
    getCreateSequenceString in class Dialect
    
    Parameters:
    sequenceName - The name of the sequence
    
    Returns:
    The sequence creation command
  - getCreateSequenceString
```
protected String getCreateSequenceString(String sequenceName,
                             int initialValue,
                             int incrementSize)
                                  throws MappingException
```
    Because of the overridden getCreateSequenceString(String), we must also override getCreateSequenceString(String, int, int) to prevent 2 instances of "start with".
    
    Overrides:
    
    getCreateSequenceString in class Dialect
    
    Parameters:
    sequenceName - The name of the sequence
    initialValue - The initial value to apply to 'create sequence' statement
    incrementSize - The increment value to apply to 'create sequence' statement
    
    Returns:
    The sequence creation command
    
    Throws:
    
    MappingException - If sequences are not supported.
  - getDropSequenceString
```
protected String getDropSequenceString(String sequenceName)
```
    Description copied from class: Dialect
    
    Typically dialects which support sequences can drop a sequence with a single command. This is convenience form of Dialect.getDropSequenceStrings(java.lang.String) to help facilitate that.
    Dialects which support sequences and can drop a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to drop a sequence should instead override Dialect.getDropSequenceStrings(java.lang.String).
    
    Overrides:
    
    getDropSequenceString in class Dialect
    
    Parameters:
    sequenceName - The name of the sequence
    
    Returns:
    The sequence drop commands
  - getSelectSequenceNextValString
```
public String getSelectSequenceNextValString(String sequenceName)
```
    Description copied from class: Dialect
    
    Generate the select expression fragment that will retrieve the next value of a sequence as part of another (typically DML) statement.
    This differs from Dialect.getSequenceNextValString(String) in that this should return an expression usable within another statement.
    
    Overrides:
    
    getSelectSequenceNextValString in class Dialect
    
    Parameters:
    sequenceName - the name of the sequence
    
    Returns:
    The "nextval" fragment.
  - getSequenceNextValString
```
public String getSequenceNextValString(String sequenceName)
```
    Description copied from class: Dialect
    
    Generate the appropriate select statement to to retrieve the next value of a sequence.
    This should be a "stand alone" select statement.
    
    Overrides:
    
    getSequenceNextValString in class Dialect
    
    Parameters:
    sequenceName - the name of the sequence
    
    Returns:
    String The "nextval" select string.
  - 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.
    See Also:
    SchemaUpdate
  - getViolatedConstraintNameExtracter
```
public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter()
```
    Specified by:
    
    getViolatedConstraintNameExtracter in interface ConversionContext
    
    Overrides:
    
    getViolatedConstraintNameExtracter in class Dialect
  - getSelectClauseNullString
```
public String getSelectClauseNullString(int sqlType)
```
    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.
    
    Returns:
    The appropriate select clause value fragment.
  - supportsUnionAll
```
public boolean supportsUnionAll()
```
    Description copied from class: Dialect
    
    Does this dialect support UNION ALL, which is generally a faster variant of UNION?
    
    Overrides:
    
    supportsUnionAll in class Dialect
    
    Returns:
    True if UNION ALL is supported; false otherwise.
  - supportsTemporaryTables
```
public boolean supportsTemporaryTables()
```
    Description copied from class: Dialect
    
    Does this dialect support temporary tables?
    
    Overrides:
    
    supportsTemporaryTables in class Dialect
    
    Returns:
    True if temp tables are supported; false otherwise.
  - generateTemporaryTableName
```
public String generateTemporaryTableName(String baseTableName)
```
    Description copied from class: Dialect
    
    Generate a temporary table name given the base table.
    
    Overrides:
    
    generateTemporaryTableName in class Dialect
    
    Parameters:
    baseTableName - The table name from which to base the temp table name.
    
    Returns:
    The generated temp table name.
  - getCreateTemporaryTableString
```
public String getCreateTemporaryTableString()
```
    Description copied from class: Dialect
    
    Command used to create a temporary table.
    
    Overrides:
    
    getCreateTemporaryTableString in class Dialect
    
    Returns:
    The command used to create a temporary table.
  - getCreateTemporaryTablePostfix
```
public String getCreateTemporaryTablePostfix()
```
    Description copied from class: Dialect
    
    Get any fragments needing to be postfixed to the command for temporary table creation.
    
    Overrides:
    
    getCreateTemporaryTablePostfix in class Dialect
    
    Returns:
    Any required postfix.
  - getDropTemporaryTableString
```
public String getDropTemporaryTableString()
```
    Description copied from class: Dialect
    
    Command used to drop a temporary table.
    
    Overrides:
    
    getDropTemporaryTableString in class Dialect
    
    Returns:
    The command used to drop a temporary table.
  - performTemporaryTableDDLInIsolation
```
public Boolean performTemporaryTableDDLInIsolation()
```
    Description copied from class: Dialect
    Does the dialect require that temporary table DDL statements occur in isolation from other statements? This would be the case if the creation would cause any current transaction to get committed implicitly.
    JDBC defines a standard way to query for this information via the DatabaseMetaData.dataDefinitionCausesTransactionCommit() method. However, that does not distinguish between temporary table DDL and other forms of DDL; MySQL, for example, reports DDL causing a transaction commit via its driver, even though that is not the case for temporary table DDL.
    Possible return values and their meanings:
    - Boolean.TRUE - Unequivocally, perform the temporary table DDL in isolation.
    - Boolean.FALSE - Unequivocally, do not perform the temporary table DDL in isolation.
    - null - defer to the JDBC driver response in regards to DatabaseMetaData.dataDefinitionCausesTransactionCommit()
    Overrides:
    
    performTemporaryTableDDLInIsolation in class Dialect
    
    Returns:
    see the result matrix above.
  - dropTemporaryTableAfterUse
```
public boolean dropTemporaryTableAfterUse()
```
    Description copied from class: Dialect
    
    Do we need to drop the temporary table after use?
    
    Overrides:
    
    dropTemporaryTableAfterUse in class Dialect
    
    Returns:
    True if the table should be dropped.
  - supportsCurrentTimestampSelection
```
public boolean supportsCurrentTimestampSelection()
```
    HSQLDB 1.8.x requires CALL CURRENT_TIMESTAMP but this should not be treated as a callable statement. It is equivalent to "select current_timestamp from dual" in some databases. HSQLDB 2.0 also supports VALUES CURRENT_TIMESTAMP
    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.
  - 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.
  - getCurrentTimestampSQLFunctionName
```
public String getCurrentTimestampSQLFunctionName()
```
    Description copied from class: Dialect
    
    The name of the database-specific SQL function for retrieving the current timestamp.
    
    Overrides:
    
    getCurrentTimestampSQLFunctionName in class Dialect
    
    Returns:
    The function name.
  - getLockingStrategy
```
public LockingStrategy getLockingStrategy(Lockable lockable,
                                 LockMode lockMode)
```
    For HSQLDB 2.0, this is a copy of the base class implementation. For HSQLDB 1.8, only READ_UNCOMMITTED is supported.
    Get a strategy instance which knows how to acquire a database-level lock of the specified mode for this dialect.
    
    Overrides:
    
    getLockingStrategy in class Dialect
    
    Parameters:
    lockable - The persister for the entity to be locked.
    lockMode - The type of lock to be acquired.
    
    Returns:
    The appropriate locking strategy.
  - 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
  - supportsEmptyInList
```
public boolean supportsEmptyInList()
```
    Description copied from class: Dialect
    
    Does this dialect support empty IN lists?
    For example, is [where XYZ in ()] a supported construct?
    
    Overrides:
    
    supportsEmptyInList in class Dialect
    
    Returns:
    True if empty in lists are supported; false otherwise.
  - requiresCastingOfParametersInSelectClause
```
public boolean requiresCastingOfParametersInSelectClause()
```
    Description copied from class: Dialect
    
    Does this dialect require that parameters appearing in the SELECT clause be wrapped in cast() calls to tell the db parser the expected type.
    
    Overrides:
    
    requiresCastingOfParametersInSelectClause in class Dialect
    
    Returns:
    True if select clause parameter must be cast()ed
  - doesReadCommittedCauseWritersToBlockReaders
```
public boolean doesReadCommittedCauseWritersToBlockReaders()
```
    Description copied from class: Dialect
    
    For the underlying database, is READ_COMMITTED isolation implemented by forcing readers to wait for write locks to be released?
    
    Overrides:
    
    doesReadCommittedCauseWritersToBlockReaders in class Dialect
    
    Returns:
    True if writers block readers to achieve READ_COMMITTED; false otherwise.
  - doesRepeatableReadCauseReadersToBlockWriters
```
public boolean doesRepeatableReadCauseReadersToBlockWriters()
```
    Description copied from class: Dialect
    
    For the underlying database, is REPEATABLE_READ isolation implemented by forcing writers to wait for read locks to be released?
    
    Overrides:
    
    doesRepeatableReadCauseReadersToBlockWriters in class Dialect
    
    Returns:
    True if readers block writers to achieve REPEATABLE_READ; false otherwise.
  - supportsLobValueChangePropogation
```
public boolean supportsLobValueChangePropogation()
```
    Description copied from class: Dialect
    
    Does the dialect support propagating 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 propagated back to the database; false otherwise.
  - toBooleanValueString
```
public String toBooleanValueString(boolean bool)
```
    Description copied from class: Dialect
    
    The SQL literal value to which this database maps boolean values.
    
    Overrides:
    
    toBooleanValueString in class Dialect
    
    Parameters:
    bool - The boolean value
    
    Returns:
    The appropriate SQL literal.
  - 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.

Class HSQLDialect

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

Constructor Detail

HSQLDialect

Method Detail

getAddColumnString

supportsIdentityColumns

getIdentityColumnString

getIdentitySelectString

getIdentityInsertString

supportsLockTimeouts

getForUpdateString

supportsLimit

getLimitString

bindLimitParametersFirst

supportsIfExistsAfterTableName

supportsColumnCheck

supportsSequences

supportsPooledSequences

getCreateSequenceString

getCreateSequenceString

getDropSequenceString

getSelectSequenceNextValString

getSequenceNextValString

getQuerySequencesString

getViolatedConstraintNameExtracter

getSelectClauseNullString

supportsUnionAll

supportsTemporaryTables

generateTemporaryTableName

getCreateTemporaryTableString

getCreateTemporaryTablePostfix

getDropTemporaryTableString

performTemporaryTableDDLInIsolation

dropTemporaryTableAfterUse

supportsCurrentTimestampSelection

isCurrentTimestampSelectStringCallable

getCurrentTimestampSelectString

getCurrentTimestampSQLFunctionName

getLockingStrategy

supportsCommentOn

supportsEmptyInList

requiresCastingOfParametersInSelectClause

doesReadCommittedCauseWritersToBlockReaders

doesRepeatableReadCauseReadersToBlockWriters

supportsLobValueChangePropogation

toBooleanValueString

supportsTupleDistinctCounts