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

All Implemented Interfaces:

ConversionContext

Direct Known Subclasses:

MySQL5Dialect, MySQLInnoDBDialect, MySQLMyISAMDialect
```
public class MySQLDialect
extends Dialect
```
An SQL dialect for MySQL (prior to 5.x).

Field Summary

Fields
Modifier and Type Field Description

static String ESCAPE_PATTERN_REPLACEMENT
- 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, STANDARD_DEFAULT_BATCH_LOAD_SIZING_STRATEGY, STREAM_XFER_LOB_MERGE_STRATEGY, TWO_SINGLE_QUOTES_REPLACEMENT

Constructor Summary

Constructors
Constructor Description

MySQLDialect()
Constructs a MySQLDialect

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`areStringComparisonsCaseInsensitive()`	Are string comparisons implicitly case insensitive.
`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`	`canCreateCatalog()`	Does this dialect support catalog creation?
`boolean`	`canCreateSchema()`	Does this dialect support schema creation?
`char`	`closeQuote()`	The character specific to this dialect used to close a quoted identifier.
`boolean`	`dropConstraints()`	Do we need to drop constraints before dropping tables in this dialect?
`protected String`	`escapeLiteral(String literal)`	Escape String literal.
`protected String`	`fixedPointNumberCastTarget()`	Determine the cast target for `Types.NUMERIC`
`protected String`	`floatingPointNumberCastTarget()`	Determine the cast target for `Types.FLOAT` and `Types.REAL` (DOUBLE)
`String`	`getAddColumnString()`	The syntax used to add a column to a table (optional).
`String`	`getAddForeignKeyConstraintString(String constraintName, String[] foreignKey, String referencedTable, String[] primaryKey, boolean referencesPrimaryKey)`	The syntax used to add a foreign key constraint to a table.
`String`	`getCastTypeName(int code)`	Get the name of the database type appropriate for casting operations (via the CAST() SQL function) for the given `Types` typecode.
`String`	`getColumnComment(String comment)`	Get the comment into a form supported for column definition.
`String[]`	`getCreateCatalogCommand(String catalogName)`	Get the SQL command used to create the named catalog
`String[]`	`getCreateSchemaCommand(String schemaName)`	Get the SQL command used to create the named schema
`String`	`getCurrentTimestampSelectString()`	Retrieve the command used to retrieve the current timestamp from the database.
`MultiTableBulkIdStrategy`	`getDefaultMultiTableBulkIdStrategy()`
`protected MySQLStorageEngine`	`getDefaultMySQLStorageEngine()`
`String[]`	`getDropCatalogCommand(String catalogName)`	Get the SQL command used to drop the named catalog
`String`	`getDropForeignKeyString()`
`String[]`	`getDropSchemaCommand(String schemaName)`	Get the SQL command used to drop the named schema
`protected String`	`getEngineKeyword()`
`String`	`getForUpdateString()`	Get the string to append to SELECT statements to acquire locks for this dialect.
`IdentityColumnSupport`	`getIdentityColumnSupport()`	Get the appropriate `IdentityColumnSupport`
`LimitHandler`	`getLimitHandler()`	Returns the delegate managing LIMIT clause.
`String`	`getLimitString(String sql, boolean hasOffset)`	Apply a limit clause to the query.
`NameQualifierSupport`	`getNameQualifierSupport()`	By default interpret this based on DatabaseMetaData.
`String`	`getNotExpression(String expression)`	Negate an expression
`String`	`getReadLockString(int timeout)`	Get the string to append to SELECT statements to acquire READ locks for this dialect.
`ResultSet`	`getResultSet(CallableStatement ps)`	Given a callable statement previously processed by `Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int)`, extract the `ResultSet` from the OUT parameter.
`String`	`getSelectGUIDString()`	Get the command used to select a GUID from the underlying database.
`String`	`getTableComment(String comment)`	Get the comment into a form supported for table definition.
`String`	`getTableTypeString()`
`UniqueDelegate`	`getUniqueDelegate()`	Get the UniqueDelegate supported by this dialect
`String`	`getWriteLockString(int timeout)`	Get the string to append to SELECT statements to acquire WRITE locks for this dialect.
`boolean`	`hasSelfReferentialForeignKeyBug()`	Does the database/driver have bug in deleting rows that refer to other rows being deleted in the same query?
`boolean`	`isCurrentTimestampSelectStringCallable()`	Should the value returned by `Dialect.getCurrentTimestampSelectString()` be treated as callable.
`boolean`	`isJdbcLogWarningsEnabledByDefault()`	Does the fetching JDBC statement warning for logging is enabled by default
`char`	`openQuote()`	The character specific to this dialect used to begin a quoted identifier.
`boolean`	`qualifyIndexName()`	Do we need to qualify index names with the schema name?
`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.
`protected void`	`registerVarcharTypes()`
`String`	`renderOrderByElement(String expression, String collation, String order, NullPrecedence nulls)`	Renders an ordering fragment
`protected String`	`smallIntegerCastTarget()`	Determine the cast target for `Types.INTEGER`, `Types.BIGINT` and `Types.SMALLINT`
`boolean`	`supportsCascadeDelete()`	Does this dialect support cascaded delete on foreign key definitions?
`boolean`	`supportsCurrentTimestampSelection()`	Does this dialect support a way to retrieve the database's current timestamp value?
`boolean`	`supportsEmptyInList()`	Does this dialect support empty IN lists?
`boolean`	`supportsIfExistsBeforeTableName()`	For dropping a table, can the phrase "if exists" be applied before the table name?
`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`	`supportsRowValueConstructorSyntax()`	Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax; sometimes called tuple syntax.
`boolean`	`supportsRowValueConstructorSyntaxInSet()`	Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax, sometimes called tuple syntax, in the SET clause;
`boolean`	`supportsSelectAliasInGroupByClause()`
`boolean`	`supportsSubqueryOnMutatingTable()`	Does this dialect support referencing the table being mutated in a subquery.

Methods inherited from class org.hibernate.dialect.Dialect
addSqlHintOrComment, appendLockHint, appendLockHint, applyLocksToSql, augmentPhysicalTableTypes, augmentRecognizedTableTypes, bindLimitParametersFirst, bindLimitParametersInReverseOrder, buildSQLExceptionConverter, cast, cast, cast, contributeTypes, convertToFirstRowValue, createCaseFragment, createOuterJoinFragment, defaultScrollMode, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, equivalentTypes, escapeComment, forceLimitUsage, forceLobAsLastValue, forUpdateOfColumns, getAddColumnSuffixString, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getAddUniqueConstraintString, getAlterTableString, getAuxiliaryDatabaseObjectExporter, getCallableStatementSupport, getCascadeConstraintsString, getCaseInsensitiveLike, getColumnAliasExtractor, getCreateMultisetTableString, getCreateSequenceString, getCreateSequenceString, getCreateSequenceStrings, getCreateSequenceStrings, getCreateTableString, getCreateTemporaryTableColumnAnnotation, getCrossJoinSeparator, getCurrentSchemaCommand, getCurrentTimestampSQLFunctionName, getDefaultBatchLoadSizingStrategy, getDefaultProperties, getDialect, getDialect, getDropSequenceString, getDropSequenceStrings, getDropTableString, getForeignKeyExporter, getForUpdateNowaitString, getForUpdateNowaitString, getForUpdateSkipLockedString, getForUpdateSkipLockedString, getForUpdateString, getForUpdateString, getForUpdateString, getForUpdateString, getFunctions, getHibernateTypeName, getHibernateTypeName, getIndexExporter, getInExpressionCountLimit, getKeywords, getLimitString, getLobMergeStrategy, getLockingStrategy, getLowercaseFunction, getMaxAliasLength, getNativeIdentifierGeneratorClass, getNativeIdentifierGeneratorStrategy, getNoColumnsInsertString, getNullColumnString, getQueryHintString, getQueryHintString, getQuerySequencesString, getReadLockString, getResultSet, getResultSet, getSchemaNameResolver, getSelectClauseNullString, getSelectSequenceNextValString, getSequenceExporter, getSequenceInformationExtractor, getSequenceNextValString, getSqlTypeDescriptorOverride, getTableExporter, getTypeName, getTypeName, getUniqueKeyExporter, getViolatedConstraintNameExtracter, getWriteLockString, hasAlterTable, inlineLiteral, isLegacyLimitHandlerBehaviorEnabled, isLockTimeoutParameterized, isTypeNameRegistered, prependComment, quote, registerColumnType, registerColumnType, registerFunction, registerHibernateType, registerHibernateType, registerKeyword, registerResultSetOutParameter, remapSqlTypeDescriptor, replaceResultVariableInOrderByClauseWithPosition, requiresCastingOfParametersInSelectClause, requiresParensForTupleDistinctCounts, supportsBindAsCallableArgument, supportsCaseInsensitiveLike, supportsCircularCascadeDeleteConstraints, supportsColumnCheck, supportsCommentOn, supportsExistsInSelect, supportsExpectedLobUsagePattern, supportsIfExistsAfterAlterTable, supportsIfExistsAfterConstraintName, supportsIfExistsAfterTableName, supportsIfExistsBeforeConstraintName, supportsJdbcConnectionLobCreation, supportsLimitOffset, supportsNamedParameters, supportsNationalizedTypes, supportsNoColumnsInsert, supportsNonQueryWithCTE, supportsNotNullUnique, supportsNoWait, supportsOuterJoinForUpdate, supportsParametersInInsertSelect, supportsPartitionBy, supportsPooledSequences, supportsResultSetPositionQueryMethodsOnForwardOnlyCursor, supportsRowValueConstructorSyntaxInInList, supportsSequences, supportsSkipLocked, supportsSubselectAsInPredicateLHS, supportsTableCheck, supportsTupleCounts, supportsTupleDistinctCounts, supportsTuplesInSubqueries, supportsUnboundedLobLocatorMaterialization, supportsUnionAll, supportsUnique, supportsUniqueConstraintInCreateAlterTable, supportsValuesList, supportsVariableLimit, toBooleanValueString, toString, transformSelectString, useFollowOnLocking, useFollowOnLocking, useInputStreamToInsertBlob, useMaxForLimit

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

- Field Detail
  - ESCAPE_PATTERN_REPLACEMENT
```
public static final String ESCAPE_PATTERN_REPLACEMENT
```
- Constructor Detail
  - MySQLDialect
```
public MySQLDialect()
```
    Constructs a MySQLDialect
- Method Detail
  - registerVarcharTypes
```
protected void registerVarcharTypes()
```
  - 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.
  - qualifyIndexName
```
public boolean qualifyIndexName()
```
    Description copied from class: Dialect
    
    Do we need to qualify index names with the schema name?
    
    Overrides:
    
    qualifyIndexName in class Dialect
    
    Returns:
    
    boolean
  - getAddForeignKeyConstraintString
```
public String getAddForeignKeyConstraintString(String constraintName,
                                               String[] foreignKey,
                                               String referencedTable,
                                               String[] primaryKey,
                                               boolean referencesPrimaryKey)
```
    Description copied from class: Dialect
    
    The syntax used to add a foreign key constraint to a table.
    
    Overrides:
    
    getAddForeignKeyConstraintString in class Dialect
    
    Parameters:
    
    constraintName - The FK constraint name.
    
    foreignKey - The names of the columns comprising the FK
    
    referencedTable - The table referenced by the FK
    
    primaryKey - The explicit columns in the referencedTable referenced by this FK.
    
    referencesPrimaryKey - if false, constraint should be explicit about which column names the constraint refers to
    
    Returns:
    
    the "add FK" fragment
  - 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.
  - getDropForeignKeyString
```
public String getDropForeignKeyString()
```
    Overrides:
    
    getDropForeignKeyString in class Dialect
  - getLimitHandler
```
public LimitHandler getLimitHandler()
```
    Description copied from class: Dialect
    
    Returns the delegate managing LIMIT clause.
    
    Overrides:
    
    getLimitHandler in class Dialect
    
    Returns:
    
    LIMIT clause delegate.
  - getLimitString
```
public String getLimitString(String sql,
                             boolean hasOffset)
```
    Description copied from class: Dialect
    
    Apply a 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 offset 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
  - closeQuote
```
public char closeQuote()
```
    Description copied from class: Dialect
    
    The character specific to this dialect used to close a quoted identifier.
    
    Overrides:
    
    closeQuote in class Dialect
    
    Returns:
    
    The dialect's specific close quote character.
  - openQuote
```
public char openQuote()
```
    Description copied from class: Dialect
    
    The character specific to this dialect used to begin a quoted identifier.
    
    Overrides:
    
    openQuote in class Dialect
    
    Returns:
    
    The dialect's specific open quote character.
  - canCreateCatalog
```
public boolean canCreateCatalog()
```
    Description copied from class: Dialect
    
    Does this dialect support catalog creation?
    
    Overrides:
    
    canCreateCatalog in class Dialect
    
    Returns:
    
    True if the dialect supports catalog creation; false otherwise.
  - getCreateCatalogCommand
```
public String[] getCreateCatalogCommand(String catalogName)
```
    Description copied from class: Dialect
    
    Get the SQL command used to create the named catalog
    
    Overrides:
    
    getCreateCatalogCommand in class Dialect
    
    Parameters:
    
    catalogName - The name of the catalog to be created.
    
    Returns:
    
    The creation commands
  - getDropCatalogCommand
```
public String[] getDropCatalogCommand(String catalogName)
```
    Description copied from class: Dialect
    
    Get the SQL command used to drop the named catalog
    
    Overrides:
    
    getDropCatalogCommand in class Dialect
    
    Parameters:
    
    catalogName - The name of the catalog to be dropped.
    
    Returns:
    
    The drop commands
  - 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.
  - getCreateSchemaCommand
```
public String[] getCreateSchemaCommand(String schemaName)
```
    Description copied from class: Dialect
    
    Get the SQL command used to create the named schema
    
    Overrides:
    
    getCreateSchemaCommand in class Dialect
    
    Parameters:
    
    schemaName - The name of the schema to be created.
    
    Returns:
    
    The creation commands
  - getDropSchemaCommand
```
public String[] getDropSchemaCommand(String schemaName)
```
    Description copied from class: Dialect
    
    Get the SQL command used to drop the named schema
    
    Overrides:
    
    getDropSchemaCommand in class Dialect
    
    Parameters:
    
    schemaName - The name of the schema to be dropped.
    
    Returns:
    
    The drop commands
  - supportsIfExistsBeforeTableName
```
public boolean supportsIfExistsBeforeTableName()
```
    Description copied from class: Dialect
    
    For dropping a table, can the phrase "if exists" be applied before the table name?
    NOTE : Only one or the other (or neither) of this and Dialect.supportsIfExistsAfterTableName() should return true
    
    Overrides:
    
    supportsIfExistsBeforeTableName in class Dialect
    
    Returns:
    
    true if the "if exists" can be applied before the table name
  - 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.
  - getTableComment
```
public String getTableComment(String comment)
```
    Description copied from class: Dialect
    
    Get the comment into a form supported for table definition.
    
    Overrides:
    
    getTableComment in class Dialect
    
    Parameters:
    
    comment - The comment to apply
    
    Returns:
    
    The comment fragment
  - getColumnComment
```
public String getColumnComment(String comment)
```
    Description copied from class: Dialect
    
    Get the comment into a form supported for column definition.
    
    Overrides:
    
    getColumnComment in class Dialect
    
    Parameters:
    
    comment - The comment to apply
    
    Returns:
    
    The comment fragment
  - getDefaultMultiTableBulkIdStrategy
```
public MultiTableBulkIdStrategy getDefaultMultiTableBulkIdStrategy()
```
    Overrides:
    
    getDefaultMultiTableBulkIdStrategy in class Dialect
  - getCastTypeName
```
public String getCastTypeName(int code)
```
    Description copied from class: Dialect
    
    Get the name of the database type appropriate for casting operations (via the CAST() SQL function) for the given Types typecode.
    
    Overrides:
    
    getCastTypeName in class Dialect
    
    Parameters:
    
    code - The Types typecode
    
    Returns:
    
    The database type name
  - smallIntegerCastTarget
```
protected String smallIntegerCastTarget()
```
    Determine the cast target for Types.INTEGER, Types.BIGINT and Types.SMALLINT
    
    Returns:
    
    The proper cast target type.
  - floatingPointNumberCastTarget
```
protected String floatingPointNumberCastTarget()
```
    Determine the cast target for Types.FLOAT and Types.REAL (DOUBLE)
    
    Returns:
    
    The proper cast target type.
  - fixedPointNumberCastTarget
```
protected String fixedPointNumberCastTarget()
```
    Determine the cast target for Types.NUMERIC
    
    Returns:
    
    The proper cast target type.
  - 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.
  - 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.
  - 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.
  - getUniqueDelegate
```
public UniqueDelegate getUniqueDelegate()
```
    Description copied from class: Dialect
    
    Get the UniqueDelegate supported by this dialect
    
    Overrides:
    
    getUniqueDelegate in class Dialect
    
    Returns:
    
    The UniqueDelegate
  - supportsRowValueConstructorSyntax
```
public boolean supportsRowValueConstructorSyntax()
```
    Description copied from class: Dialect
    
    Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax; sometimes called tuple syntax.
    Basically, does it support syntax like "... where (FIRST_NAME, LAST_NAME) = ('Steve', 'Ebersole') ...".
    
    Overrides:
    
    supportsRowValueConstructorSyntax in class Dialect
    
    Returns:
    
    True if this SQL dialect is known to support "row value constructor" syntax; false otherwise.
  - supportsRowValueConstructorSyntaxInSet
```
public boolean supportsRowValueConstructorSyntaxInSet()
```
    Description copied from class: Dialect
    
    Is this dialect known to support what ANSI-SQL terms "row value constructor" syntax, sometimes called tuple syntax, in the SET clause;
    Basically, does it support syntax like "... SET (FIRST_NAME, LAST_NAME) = ('Steve', 'Ebersole') ...".
    
    Overrides:
    
    supportsRowValueConstructorSyntaxInSet in class Dialect
    
    Returns:
    
    True if this SQL dialect is known to support "row value constructor" syntax in the SET clause; false otherwise.
  - renderOrderByElement
```
public String renderOrderByElement(String expression,
                                   String collation,
                                   String order,
                                   NullPrecedence nulls)
```
    Description copied from class: Dialect
    
    Renders an ordering fragment
    
    Overrides:
    
    renderOrderByElement in class Dialect
    
    Parameters:
    
    expression - The SQL order expression. In case of @OrderBy annotation user receives property placeholder (e.g. attribute name enclosed in '{' and '}' signs).
    
    collation - Collation string in format collate IDENTIFIER, or null if expression has not been explicitly specified.
    
    order - Order direction. Possible values: asc, desc, or null if expression has not been explicitly specified.
    
    nulls - Nulls precedence. Default value: NullPrecedence.NONE.
    
    Returns:
    
    Renders single element of ORDER BY clause.
  - 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.
  - 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.
  - 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.
  - 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.
  - areStringComparisonsCaseInsensitive
```
public boolean areStringComparisonsCaseInsensitive()
```
    Description copied from class: Dialect
    
    Are string comparisons implicitly case insensitive.
    In other words, does [where 'XYZ' = 'xyz'] resolve to true?
    
    Overrides:
    
    areStringComparisonsCaseInsensitive in class Dialect
    
    Returns:
    
    True if comparisons are case insensitive.
  - 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.
  - supportsSubqueryOnMutatingTable
```
public boolean supportsSubqueryOnMutatingTable()
```
    Description copied from class: Dialect
    Does this dialect support referencing the table being mutated in a subquery. The "table being mutated" is the table referenced in an UPDATE or a DELETE query. And so can that table then be referenced in a subquery of said UPDATE/DELETE query.
    For example, would the following two syntaxes be supported:
    
    delete from TABLE_A where ID not in ( select ID from TABLE_A )
    
    update TABLE_A set NON_ID = 'something' where ID in ( select ID from TABLE_A)
    Overrides:
    
    supportsSubqueryOnMutatingTable in class Dialect
    
    Returns:
    
    True if this dialect allows references the mutating table from a subquery.
  - 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.
  - buildSQLExceptionConversionDelegate
```
public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate()
```
    Description copied from class: Dialect
    Build an instance of a SQLExceptionConversionDelegate for interpreting dialect-specific error or SQLState codes.
    When Dialect.buildSQLExceptionConverter() returns null, the default SQLExceptionConverter is used to interpret SQLState and error 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
  - getNameQualifierSupport
```
public NameQualifierSupport getNameQualifierSupport()
```
    Description copied from class: Dialect
    
    By default interpret this based on DatabaseMetaData.
    
    Overrides:
    
    getNameQualifierSupport in class Dialect
    
    Returns:
    
    The NameQualifierSupport.
  - 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()
  - getNotExpression
```
public String getNotExpression(String expression)
```
    Description copied from class: Dialect
    
    Negate an expression
    
    Overrides:
    
    getNotExpression in class Dialect
    
    Parameters:
    
    expression - The expression to negate
    
    Returns:
    
    The negated expression
  - getIdentityColumnSupport
```
public IdentityColumnSupport getIdentityColumnSupport()
```
    Description copied from class: Dialect
    
    Get the appropriate IdentityColumnSupport
    
    Overrides:
    
    getIdentityColumnSupport in class Dialect
    
    Returns:
    
    the IdentityColumnSupport
  - isJdbcLogWarningsEnabledByDefault
```
public boolean isJdbcLogWarningsEnabledByDefault()
```
    Description copied from class: Dialect
    
    Does the fetching JDBC statement warning for logging is enabled by default
    
    Overrides:
    
    isJdbcLogWarningsEnabledByDefault in class Dialect
    
    Returns:
    
    boolean
  - supportsCascadeDelete
```
public boolean supportsCascadeDelete()
```
    Description copied from class: Dialect
    
    Does this dialect support cascaded delete on foreign key definitions?
    
    Overrides:
    
    supportsCascadeDelete in class Dialect
    
    Returns:
    
    true indicates that the dialect does support cascaded delete on foreign keys.
  - getTableTypeString
```
public String getTableTypeString()
```
    Overrides:
    
    getTableTypeString in class Dialect
  - getEngineKeyword
```
protected String getEngineKeyword()
```
  - hasSelfReferentialForeignKeyBug
```
public boolean hasSelfReferentialForeignKeyBug()
```
    Description copied from class: Dialect
    
    Does the database/driver have bug in deleting rows that refer to other rows being deleted in the same query?
    
    Overrides:
    
    hasSelfReferentialForeignKeyBug in class Dialect
    
    Returns:
    
    true if the database/driver has this bug
  - 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.
  - getDefaultMySQLStorageEngine
```
protected MySQLStorageEngine getDefaultMySQLStorageEngine()
```
  - escapeLiteral
```
protected String escapeLiteral(String literal)
```
    Description copied from class: Dialect
    
    Escape String literal.
    
    Overrides:
    
    escapeLiteral in class Dialect
    
    Returns:
    
    escaped String
  - supportsSelectAliasInGroupByClause
```
public boolean supportsSelectAliasInGroupByClause()
```
    Overrides:
    
    supportsSelectAliasInGroupByClause in class Dialect

Class MySQLDialect

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

ESCAPE_PATTERN_REPLACEMENT

Constructor Detail

MySQLDialect

Method Detail

registerVarcharTypes

getAddColumnString

qualifyIndexName

getAddForeignKeyConstraintString

supportsLimit

getDropForeignKeyString

getLimitHandler

getLimitString

closeQuote

openQuote

canCreateCatalog

getCreateCatalogCommand

getDropCatalogCommand

canCreateSchema

getCreateSchemaCommand

getDropSchemaCommand

supportsIfExistsBeforeTableName

getSelectGUIDString

getTableComment

getColumnComment

getDefaultMultiTableBulkIdStrategy

getCastTypeName

smallIntegerCastTarget

floatingPointNumberCastTarget

fixedPointNumberCastTarget

supportsCurrentTimestampSelection

isCurrentTimestampSelectStringCallable

getCurrentTimestampSelectString

registerResultSetOutParameter

getResultSet

getUniqueDelegate

supportsRowValueConstructorSyntax

supportsRowValueConstructorSyntaxInSet

renderOrderByElement

getForUpdateString

getWriteLockString

getReadLockString

supportsEmptyInList

areStringComparisonsCaseInsensitive

supportsLobValueChangePropogation

supportsSubqueryOnMutatingTable

supportsLockTimeouts

buildSQLExceptionConversionDelegate

getNameQualifierSupport

buildIdentifierHelper

getNotExpression

getIdentityColumnSupport

isJdbcLogWarningsEnabledByDefault

supportsCascadeDelete

getTableTypeString

getEngineKeyword

hasSelfReferentialForeignKeyBug

dropConstraints

getDefaultMySQLStorageEngine

escapeLiteral

supportsSelectAliasInGroupByClause