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

所有已实现的接口:

ConversionContext

直接已知子类:

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

作者:

Gavin King

字段概要

字段
修饰符和类型字段说明

static String ESCAPE_PATTERN_REPLACEMENT
- 从类继承的字段 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

构造器概要

构造器
构造器说明

MySQLDialect()
Constructs a MySQLDialect

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`boolean`	`areStringComparisonsCaseInsensitive()`	Are string comparisons implicitly case insensitive.
`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.
`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?
`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`	`supportsSelectAliasInGroupByClause()`
`boolean`	`supportsSubqueryOnMutatingTable()`	Does this dialect support referencing the table being mutated in a subquery.

从类继承的方法 org.hibernate.dialect.Dialect
addSqlHintOrComment, appendLockHint, appendLockHint, applyLocksToSql, augmentRecognizedTableTypes, bindLimitParametersFirst, bindLimitParametersInReverseOrder, buildIdentifierHelper, buildSQLExceptionConverter, cast, cast, cast, contributeTypes, convertToFirstRowValue, createCaseFragment, createOuterJoinFragment, defaultScrollMode, doesReadCommittedCauseWritersToBlockReaders, doesRepeatableReadCauseReadersToBlockWriters, forceLimitUsage, forceLobAsLastValue, forUpdateOfColumns, getAddColumnSuffixString, getAddForeignKeyConstraintString, getAddPrimaryKeyConstraintString, getAddUniqueConstraintString, getAlterTableString, getAuxiliaryDatabaseObjectExporter, getCallableStatementSupport, getCascadeConstraintsString, getCaseInsensitiveLike, getColumnAliasExtractor, getCreateMultisetTableString, getCreateSequenceString, getCreateSequenceString, getCreateSequenceStrings, getCreateSequenceStrings, getCreateTableString, 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, getNameQualifierSupport, 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

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 字段详细资料
  - ESCAPE_PATTERN_REPLACEMENT
```
public static final String ESCAPE_PATTERN_REPLACEMENT
```
- 构造器详细资料
  - MySQLDialect
```
public MySQLDialect()
```
    Constructs a MySQLDialect
- 方法详细资料
  - registerVarcharTypes
```
protected void registerVarcharTypes()
```
  - getAddColumnString
```
public String getAddColumnString()
```
    从类复制的说明: Dialect
    
    The syntax used to add a column to a table (optional).
    
    覆盖:
    
    getAddColumnString 在类中 Dialect
    
    返回:
    
    The "add column" fragment.
  - qualifyIndexName
```
public boolean qualifyIndexName()
```
    从类复制的说明: Dialect
    
    Do we need to qualify index names with the schema name?
    
    覆盖:
    
    qualifyIndexName 在类中 Dialect
    
    返回:
    
    boolean
  - getAddForeignKeyConstraintString
```
public String getAddForeignKeyConstraintString(String constraintName,
                                               String[] foreignKey,
                                               String referencedTable,
                                               String[] primaryKey,
                                               boolean referencesPrimaryKey)
```
    从类复制的说明: Dialect
    
    The syntax used to add a foreign key constraint to a table.
    
    覆盖:
    
    getAddForeignKeyConstraintString 在类中 Dialect
    
    参数:
    
    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
    
    返回:
    
    the "add FK" fragment
  - supportsLimit
```
public boolean supportsLimit()
```
    从类复制的说明: Dialect
    
    Does this dialect support some form of limiting query results via a SQL clause?
    
    覆盖:
    
    supportsLimit 在类中 Dialect
    
    返回:
    
    True if this dialect supports some form of LIMIT.
  - getDropForeignKeyString
```
public String getDropForeignKeyString()
```
    覆盖:
    
    getDropForeignKeyString 在类中 Dialect
  - getLimitHandler
```
public LimitHandler getLimitHandler()
```
    从类复制的说明: Dialect
    
    Returns the delegate managing LIMIT clause.
    
    覆盖:
    
    getLimitHandler 在类中 Dialect
    
    返回:
    
    LIMIT clause delegate.
  - getLimitString
```
public String getLimitString(String sql,
                             boolean hasOffset)
```
    从类复制的说明: 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).
    
    覆盖:
    
    getLimitString 在类中 Dialect
    
    参数:
    
    sql - The query to which to apply the limit.
    
    hasOffset - Is the query requesting an offset?
    
    返回:
    
    the modified SQL
  - closeQuote
```
public char closeQuote()
```
    从类复制的说明: Dialect
    
    The character specific to this dialect used to close a quoted identifier.
    
    覆盖:
    
    closeQuote 在类中 Dialect
    
    返回:
    
    The dialect's specific close quote character.
  - openQuote
```
public char openQuote()
```
    从类复制的说明: Dialect
    
    The character specific to this dialect used to begin a quoted identifier.
    
    覆盖:
    
    openQuote 在类中 Dialect
    
    返回:
    
    The dialect's specific open quote character.
  - canCreateCatalog
```
public boolean canCreateCatalog()
```
    从类复制的说明: Dialect
    
    Does this dialect support catalog creation?
    
    覆盖:
    
    canCreateCatalog 在类中 Dialect
    
    返回:
    
    True if the dialect supports catalog creation; false otherwise.
  - getCreateCatalogCommand
```
public String[] getCreateCatalogCommand(String catalogName)
```
    从类复制的说明: Dialect
    
    Get the SQL command used to create the named catalog
    
    覆盖:
    
    getCreateCatalogCommand 在类中 Dialect
    
    参数:
    
    catalogName - The name of the catalog to be created.
    
    返回:
    
    The creation commands
  - getDropCatalogCommand
```
public String[] getDropCatalogCommand(String catalogName)
```
    从类复制的说明: Dialect
    
    Get the SQL command used to drop the named catalog
    
    覆盖:
    
    getDropCatalogCommand 在类中 Dialect
    
    参数:
    
    catalogName - The name of the catalog to be dropped.
    
    返回:
    
    The drop commands
  - canCreateSchema
```
public boolean canCreateSchema()
```
    从类复制的说明: Dialect
    
    Does this dialect support schema creation?
    
    覆盖:
    
    canCreateSchema 在类中 Dialect
    
    返回:
    
    True if the dialect supports schema creation; false otherwise.
  - getCreateSchemaCommand
```
public String[] getCreateSchemaCommand(String schemaName)
```
    从类复制的说明: Dialect
    
    Get the SQL command used to create the named schema
    
    覆盖:
    
    getCreateSchemaCommand 在类中 Dialect
    
    参数:
    
    schemaName - The name of the schema to be created.
    
    返回:
    
    The creation commands
  - getDropSchemaCommand
```
public String[] getDropSchemaCommand(String schemaName)
```
    从类复制的说明: Dialect
    
    Get the SQL command used to drop the named schema
    
    覆盖:
    
    getDropSchemaCommand 在类中 Dialect
    
    参数:
    
    schemaName - The name of the schema to be dropped.
    
    返回:
    
    The drop commands
  - supportsIfExistsBeforeTableName
```
public boolean supportsIfExistsBeforeTableName()
```
    从类复制的说明: 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
    
    覆盖:
    
    supportsIfExistsBeforeTableName 在类中 Dialect
    
    返回:
    
    true if the "if exists" can be applied before the table name
  - getSelectGUIDString
```
public String getSelectGUIDString()
```
    从类复制的说明: Dialect
    
    Get the command used to select a GUID from the underlying database.
    Optional operation.
    
    覆盖:
    
    getSelectGUIDString 在类中 Dialect
    
    返回:
    
    The appropriate command.
  - getTableComment
```
public String getTableComment(String comment)
```
    从类复制的说明: Dialect
    
    Get the comment into a form supported for table definition.
    
    覆盖:
    
    getTableComment 在类中 Dialect
    
    参数:
    
    comment - The comment to apply
    
    返回:
    
    The comment fragment
  - getColumnComment
```
public String getColumnComment(String comment)
```
    从类复制的说明: Dialect
    
    Get the comment into a form supported for column definition.
    
    覆盖:
    
    getColumnComment 在类中 Dialect
    
    参数:
    
    comment - The comment to apply
    
    返回:
    
    The comment fragment
  - getDefaultMultiTableBulkIdStrategy
```
public MultiTableBulkIdStrategy getDefaultMultiTableBulkIdStrategy()
```
    覆盖:
    
    getDefaultMultiTableBulkIdStrategy 在类中 Dialect
  - getCastTypeName
```
public String getCastTypeName(int code)
```
    从类复制的说明: Dialect
    
    Get the name of the database type appropriate for casting operations (via the CAST() SQL function) for the given Types typecode.
    
    覆盖:
    
    getCastTypeName 在类中 Dialect
    
    参数:
    
    code - The Types typecode
    
    返回:
    
    The database type name
  - smallIntegerCastTarget
```
protected String smallIntegerCastTarget()
```
    Determine the cast target for Types.INTEGER, Types.BIGINT and Types.SMALLINT
    
    返回:
    
    The proper cast target type.
  - floatingPointNumberCastTarget
```
protected String floatingPointNumberCastTarget()
```
    Determine the cast target for Types.FLOAT and Types.REAL (DOUBLE)
    
    返回:
    
    The proper cast target type.
  - fixedPointNumberCastTarget
```
protected String fixedPointNumberCastTarget()
```
    Determine the cast target for Types.NUMERIC
    
    返回:
    
    The proper cast target type.
  - supportsCurrentTimestampSelection
```
public boolean supportsCurrentTimestampSelection()
```
    从类复制的说明: Dialect
    
    Does this dialect support a way to retrieve the database's current timestamp value?
    
    覆盖:
    
    supportsCurrentTimestampSelection 在类中 Dialect
    
    返回:
    
    True if the current timestamp can be retrieved; false otherwise.
  - isCurrentTimestampSelectStringCallable
```
public boolean isCurrentTimestampSelectStringCallable()
```
    从类复制的说明: Dialect
    
    Should the value returned by Dialect.getCurrentTimestampSelectString() be treated as callable. Typically this indicates that JDBC escape syntax is being used...
    
    覆盖:
    
    isCurrentTimestampSelectStringCallable 在类中 Dialect
    
    返回:
    
    True if the Dialect.getCurrentTimestampSelectString() return is callable; false otherwise.
  - getCurrentTimestampSelectString
```
public String getCurrentTimestampSelectString()
```
    从类复制的说明: Dialect
    
    Retrieve the command used to retrieve the current timestamp from the database.
    
    覆盖:
    
    getCurrentTimestampSelectString 在类中 Dialect
    
    返回:
    
    The command.
  - registerResultSetOutParameter
```
public int registerResultSetOutParameter(CallableStatement statement,
                                         int col)
                                  throws SQLException
```
    从类复制的说明: 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.
    
    覆盖:
    
    registerResultSetOutParameter 在类中 Dialect
    
    参数:
    
    statement - The callable statement.
    
    col - The bind position at which to register the output param.
    
    返回:
    
    The number of (contiguous) bind positions used.
    
    抛出:
    
    SQLException - Indicates problems registering the param.
  - getResultSet
```
public ResultSet getResultSet(CallableStatement ps)
                       throws SQLException
```
    从类复制的说明: Dialect
    
    Given a callable statement previously processed by Dialect.registerResultSetOutParameter(java.sql.CallableStatement, int), extract the ResultSet from the OUT parameter.
    
    覆盖:
    
    getResultSet 在类中 Dialect
    
    参数:
    
    ps - The callable statement.
    
    返回:
    
    The extracted result set.
    
    抛出:
    
    SQLException - Indicates problems extracting the result set.
  - getUniqueDelegate
```
public UniqueDelegate getUniqueDelegate()
```
    从类复制的说明: Dialect
    
    Get the UniqueDelegate supported by this dialect
    
    覆盖:
    
    getUniqueDelegate 在类中 Dialect
    
    返回:
    
    The UniqueDelegate
  - supportsRowValueConstructorSyntax
```
public boolean supportsRowValueConstructorSyntax()
```
    从类复制的说明: 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') ...".
    
    覆盖:
    
    supportsRowValueConstructorSyntax 在类中 Dialect
    
    返回:
    
    True if this SQL dialect is known to support "row value constructor" syntax; false otherwise.
  - renderOrderByElement
```
public String renderOrderByElement(String expression,
                                   String collation,
                                   String order,
                                   NullPrecedence nulls)
```
    从类复制的说明: Dialect
    
    Renders an ordering fragment
    
    覆盖:
    
    renderOrderByElement 在类中 Dialect
    
    参数:
    
    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.
    
    返回:
    
    Renders single element of ORDER BY clause.
  - getForUpdateString
```
public String getForUpdateString()
```
    从类复制的说明: Dialect
    
    Get the string to append to SELECT statements to acquire locks for this dialect.
    
    覆盖:
    
    getForUpdateString 在类中 Dialect
    
    返回:
    
    The appropriate FOR UPDATE clause string.
  - getWriteLockString
```
public String getWriteLockString(int timeout)
```
    从类复制的说明: 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.
    
    覆盖:
    
    getWriteLockString 在类中 Dialect
    
    参数:
    
    timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
    
    返回:
    
    The appropriate LOCK clause string.
  - getReadLockString
```
public String getReadLockString(int timeout)
```
    从类复制的说明: 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.
    
    覆盖:
    
    getReadLockString 在类中 Dialect
    
    参数:
    
    timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
    
    返回:
    
    The appropriate LOCK clause string.
  - supportsEmptyInList
```
public boolean supportsEmptyInList()
```
    从类复制的说明: Dialect
    
    Does this dialect support empty IN lists?
    For example, is [where XYZ in ()] a supported construct?
    
    覆盖:
    
    supportsEmptyInList 在类中 Dialect
    
    返回:
    
    True if empty in lists are supported; false otherwise.
  - areStringComparisonsCaseInsensitive
```
public boolean areStringComparisonsCaseInsensitive()
```
    从类复制的说明: Dialect
    
    Are string comparisons implicitly case insensitive.
    In other words, does [where 'XYZ' = 'xyz'] resolve to true?
    
    覆盖:
    
    areStringComparisonsCaseInsensitive 在类中 Dialect
    
    返回:
    
    True if comparisons are case insensitive.
  - supportsLobValueChangePropogation
```
public boolean supportsLobValueChangePropogation()
```
    从类复制的说明: 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().
    
    覆盖:
    
    supportsLobValueChangePropogation 在类中 Dialect
    
    返回:
    
    True if the changes are propagated back to the database; false otherwise.
  - supportsSubqueryOnMutatingTable
```
public boolean supportsSubqueryOnMutatingTable()
```
    从类复制的说明: 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)
    覆盖:
    
    supportsSubqueryOnMutatingTable 在类中 Dialect
    
    返回:
    
    True if this dialect allows references the mutating table from a subquery.
  - supportsLockTimeouts
```
public boolean supportsLockTimeouts()
```
    从类复制的说明: Dialect
    
    Informational metadata about whether this dialect is known to support specifying timeouts for requested lock acquisitions.
    
    覆盖:
    
    supportsLockTimeouts 在类中 Dialect
    
    返回:
    
    True is this dialect supports specifying lock timeouts.
  - buildSQLExceptionConversionDelegate
```
public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate()
```
    从类复制的说明: 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.
    覆盖:
    
    buildSQLExceptionConversionDelegate 在类中 Dialect
    
    返回:
    
    The SQLExceptionConversionDelegate for this dialect
  - getNotExpression
```
public String getNotExpression(String expression)
```
    从类复制的说明: Dialect
    
    Negate an expression
    
    覆盖:
    
    getNotExpression 在类中 Dialect
    
    参数:
    
    expression - The expression to negate
    
    返回:
    
    The negated expression
  - getIdentityColumnSupport
```
public IdentityColumnSupport getIdentityColumnSupport()
```
    从类复制的说明: Dialect
    
    Get the appropriate IdentityColumnSupport
    
    覆盖:
    
    getIdentityColumnSupport 在类中 Dialect
    
    返回:
    
    the IdentityColumnSupport
  - isJdbcLogWarningsEnabledByDefault
```
public boolean isJdbcLogWarningsEnabledByDefault()
```
    从类复制的说明: Dialect
    
    Does the fetching JDBC statement warning for logging is enabled by default
    
    覆盖:
    
    isJdbcLogWarningsEnabledByDefault 在类中 Dialect
    
    返回:
    
    boolean
  - supportsCascadeDelete
```
public boolean supportsCascadeDelete()
```
    从类复制的说明: Dialect
    
    Does this dialect support cascaded delete on foreign key definitions?
    
    覆盖:
    
    supportsCascadeDelete 在类中 Dialect
    
    返回:
    
    true indicates that the dialect does support cascaded delete on foreign keys.
  - getTableTypeString
```
public String getTableTypeString()
```
    覆盖:
    
    getTableTypeString 在类中 Dialect
  - getEngineKeyword
```
protected String getEngineKeyword()
```
  - hasSelfReferentialForeignKeyBug
```
public boolean hasSelfReferentialForeignKeyBug()
```
    从类复制的说明: Dialect
    
    Does the database/driver have bug in deleting rows that refer to other rows being deleted in the same query?
    
    覆盖:
    
    hasSelfReferentialForeignKeyBug 在类中 Dialect
    
    返回:
    
    true if the database/driver has this bug
  - dropConstraints
```
public boolean dropConstraints()
```
    从类复制的说明: Dialect
    
    Do we need to drop constraints before dropping tables in this dialect?
    
    覆盖:
    
    dropConstraints 在类中 Dialect
    
    返回:
    
    True if constraints must be dropped prior to dropping the table; false otherwise.
  - getDefaultMySQLStorageEngine
```
protected MySQLStorageEngine getDefaultMySQLStorageEngine()
```
  - escapeLiteral
```
protected String escapeLiteral(String literal)
```
    从类复制的说明: Dialect
    
    Escape String literal.
    
    覆盖:
    
    escapeLiteral 在类中 Dialect
    
    返回:
    
    escaped String
  - supportsSelectAliasInGroupByClause
```
public boolean supportsSelectAliasInGroupByClause()
```
    覆盖:
    
    supportsSelectAliasInGroupByClause 在类中 Dialect

类 MySQLDialect

字段概要

从类继承的字段 org.hibernate.dialect.Dialect

构造器概要

方法概要

从类继承的方法 org.hibernate.dialect.Dialect

从类继承的方法 java.lang.Object

字段详细资料

ESCAPE_PATTERN_REPLACEMENT

构造器详细资料

MySQLDialect

方法详细资料

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

renderOrderByElement

getForUpdateString

getWriteLockString

getReadLockString

supportsEmptyInList

areStringComparisonsCaseInsensitive

supportsLobValueChangePropogation

supportsSubqueryOnMutatingTable

supportsLockTimeouts

buildSQLExceptionConversionDelegate

getNotExpression

getIdentityColumnSupport

isJdbcLogWarningsEnabledByDefault

supportsCascadeDelete

getTableTypeString

getEngineKeyword

hasSelfReferentialForeignKeyBug

dropConstraints

getDefaultMySQLStorageEngine

escapeLiteral

supportsSelectAliasInGroupByClause