Package org.hibernate.dialect

Class AbstractHANADialect

    • Constructor Detail

      • AbstractHANADialect

        public AbstractHANADialect()

    • Method Detail

      • bindLimitParametersInReverseOrder

        public boolean bindLimitParametersInReverseOrder()
        Description copied from class: Dialect
        ANSI SQL defines the LIMIT clause to be in the form LIMIT offset, limit. Does this dialect require us to bind the parameters in reverse order?
        Overrides:
        bindLimitParametersInReverseOrder in class Dialect
        Returns:
        true if the correct order is limit, offset

      • 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:

        1. a "static" delegate based on the JDBC 4 defined SQLException hierarchy;
        2. 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

      • forUpdateOfColumns

        public boolean forUpdateOfColumns()
        Description copied from class: Dialect
        Is FOR UPDATE OF syntax supported?
        Overrides:
        forUpdateOfColumns in class Dialect
        Returns:
        True if the database supports FOR UPDATE OF syntax; false otherwise.

      • getAddColumnString

        public java.lang.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.

      • getAddColumnSuffixString

        public java.lang.String getAddColumnSuffixString()
        Description copied from class: Dialect
        The syntax for the suffix used to add a column to a table (optional).
        Overrides:
        getAddColumnSuffixString in class Dialect
        Returns:
        The suffix "add column" fragment.

      • getCascadeConstraintsString

        public java.lang.String getCascadeConstraintsString()
        Description copied from class: Dialect
        Completely optional cascading drop clause
        Overrides:
        getCascadeConstraintsString in class Dialect
        Returns:
        String

      • getCreateSequenceString

        public java.lang.String getCreateSequenceString​(java.lang.String sequenceName)
        Description copied from class: Dialect
        Typically dialects which support sequences can create a sequence with a single command. This is convenience form of Dialect.getCreateSequenceStrings(java.lang.String) to help facilitate that.

        Dialects which support sequences and can create a sequence in a single command need *only* override this method. Dialects which support sequences but require multiple commands to create a sequence should instead override Dialect.getCreateSequenceStrings(java.lang.String).

        Overrides:
        getCreateSequenceString in class Dialect
        Parameters:
        sequenceName - The name of the sequence
        Returns:
        The sequence creation command

      • getCreateSequenceString

        protected java.lang.String getCreateSequenceString​(java.lang.String sequenceName,
                                                   int initialValue,
                                                   int incrementSize)
                                            throws MappingException
        Description copied from class: Dialect
        Overloaded form of Dialect.getCreateSequenceString(String), additionally taking the initial value and increment size to be applied to the sequence definition.

        The default definition is to suffix Dialect.getCreateSequenceString(String) with the string: " start with {initialValue} increment by {incrementSize}" where {initialValue} and {incrementSize} are replacement placeholders. Generally dialects should only need to override this method if different key phrases are used to apply the allocation information.
        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.

      • getCurrentTimestampSelectString

        public java.lang.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.

      • getDropSequenceString

        public java.lang.String getDropSequenceString​(java.lang.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

      • getForUpdateString

        public java.lang.String getForUpdateString​(java.lang.String aliases)
        Description copied from class: Dialect
        Get the FOR UPDATE OF column_list fragment appropriate for this dialect given the aliases of the columns to be write locked.
        Overrides:
        getForUpdateString in class Dialect
        Parameters:
        aliases - The columns to be write locked.
        Returns:
        The appropriate FOR UPDATE OF column_list clause string.

      • getForUpdateString

        public java.lang.String getForUpdateString​(java.lang.String aliases,
                                           LockOptions lockOptions)
        Description copied from class: Dialect
        Get the FOR UPDATE OF column_list fragment appropriate for this dialect given the aliases of the columns to be write locked.
        Overrides:
        getForUpdateString in class Dialect
        Parameters:
        aliases - The columns to be write locked.
        lockOptions - the lock options to apply
        Returns:
        The appropriate FOR UPDATE OF column_list clause string.

      • getForUpdateNowaitString

        public java.lang.String getForUpdateNowaitString()
        Description copied from class: Dialect
        Retrieves the FOR UPDATE NOWAIT syntax specific to this dialect.
        Overrides:
        getForUpdateNowaitString in class Dialect
        Returns:
        The appropriate FOR UPDATE NOWAIT clause string.

      • getLimitString

        public java.lang.String getLimitString​(java.lang.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

      • getNotExpression

        public java.lang.String getNotExpression​(java.lang.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

      • getQuerySequencesString

        public java.lang.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

      • getSelectSequenceNextValString

        public java.lang.String getSelectSequenceNextValString​(java.lang.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 java.lang.String getSequenceNextValString​(java.lang.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.

      • getSqlTypeDescriptorOverride

        protected SqlTypeDescriptor getSqlTypeDescriptorOverride​(int sqlCode)
        Description copied from class: Dialect
        Returns the SqlTypeDescriptor that should be used to handle the given JDBC type code. Returns null if there is no override.
        Overrides:
        getSqlTypeDescriptorOverride in class Dialect
        Parameters:
        sqlCode - A Types constant indicating the SQL column type
        Returns:
        The SqlTypeDescriptor to use as an override, or null if there is no override.

      • registerHanaKeywords

        protected void registerHanaKeywords()

      • defaultScrollMode

        public ScrollMode defaultScrollMode()
        Description copied from class: Dialect
        Certain dialects support a subset of ScrollModes. Provide a default to be used by Criteria and Query.
        Overrides:
        defaultScrollMode in class Dialect
        Returns:
        ScrollMode

      • supportsColumnCheck

        public boolean supportsColumnCheck()
        HANA currently does not support check constraints.
        Overrides:
        supportsColumnCheck in class Dialect
        Returns:
        True if column-level CHECK constraints are supported; false otherwise.

      • 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.

      • 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.

      • supportsExistsInSelect

        public boolean supportsExistsInSelect()
        Description copied from class: Dialect
        Does the dialect support an exists statement in the select clause?
        Overrides:
        supportsExistsInSelect in class Dialect
        Returns:
        True if exists checks are allowed in the select clause; false otherwise.

      • supportsExpectedLobUsagePattern

        public boolean supportsExpectedLobUsagePattern()
        Description copied from class: Dialect
        Expected LOB usage pattern is such that I can perform an insert via prepared statement with a parameter binding for a LOB value without crazy casting to JDBC driver implementation-specific classes...

        Part of the trickiness here is the fact that this is largely driver dependent. For example, Oracle (which is notoriously bad with LOB support in their drivers historically) actually does a pretty good job with LOB support as of the 10.2.x versions of their drivers...

        Overrides:
        supportsExpectedLobUsagePattern in class Dialect
        Returns:
        True if normal LOB usage patterns can be used with this driver; false if driver-specific hookiness needs to be applied.

      • supportsUnboundedLobLocatorMaterialization

        public boolean supportsUnboundedLobLocatorMaterialization()
        Description copied from class: Dialect
        Is it supported to materialize a LOB locator outside the transaction in which it was created?

        Again, part of the trickiness here is the fact that this is largely driver dependent.

        NOTE: all database I have tested which Dialect.supportsExpectedLobUsagePattern() also support the ability to materialize a LOB outside the owning transaction...

        Overrides:
        supportsUnboundedLobLocatorMaterialization in class Dialect
        Returns:
        True if unbounded materialization is supported; false otherwise.

      • 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.

      • 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.

      • supportsTableCheck

        public boolean supportsTableCheck()
        Description copied from class: Dialect
        Does this dialect support table-level check constraints?
        Overrides:
        supportsTableCheck in class Dialect
        Returns:
        True if table-level CHECK constraints are supported; false otherwise.

      • 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.

      • 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.

      • 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.

      • 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.

      • supportsRowValueConstructorSyntaxInInList

        public boolean supportsRowValueConstructorSyntaxInInList()
        Description copied from class: Dialect
        If the dialect supports row values, does it offer such support in IN lists as well?

        For example, "... where (FIRST_NAME, LAST_NAME) IN ( (?, ?), (?, ?) ) ..."

        Overrides:
        supportsRowValueConstructorSyntaxInInList in class Dialect
        Returns:
        True if this SQL dialect is known to support "row value constructor" syntax in the IN list; false otherwise.

      • getMaxAliasLength

        public int getMaxAliasLength()
        Description copied from class: Dialect
        What is the maximum length Hibernate can use for generated aliases?

        The maximum here should account for the fact that Hibernate often needs to append "uniqueing" information to the end of generated aliases. That "uniqueing" information will be added to the end of a identifier generated to the length specified here; so be sure to leave some room (generally speaking 5 positions will suffice).

        Overrides:
        getMaxAliasLength in class Dialect
        Returns:
        The maximum length.

      • getLimitHandler

        public LimitHandler getLimitHandler()
        Description copied from class: Dialect
        Returns the delegate managing LIMIT clause.
        Overrides:
        getLimitHandler in class Dialect
        Returns:
        LIMIT clause delegate.

      • getSelectGUIDString

        public java.lang.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.

      • getCurrentSchemaCommand

        public java.lang.String getCurrentSchemaCommand()
        Description copied from class: Dialect
        Get the SQL command used to retrieve the current schema name. Works in conjunction with Dialect.getSchemaNameResolver(), unless the return from there does not need this information. E.g., a custom impl might make use of the Java 1.7 addition of the Connection.getSchema() method
        Overrides:
        getCurrentSchemaCommand in class Dialect
        Returns:
        The current schema retrieval SQL

      • getForUpdateNowaitString

        public java.lang.String getForUpdateNowaitString​(java.lang.String aliases)
        Description copied from class: Dialect
        Get the FOR UPDATE OF column_list NOWAIT fragment appropriate for this dialect given the aliases of the columns to be write locked.
        Overrides:
        getForUpdateNowaitString in class Dialect
        Parameters:
        aliases - The columns to be write locked.
        Returns:
        The appropriate FOR UPDATE OF colunm_list NOWAIT clause string.

      • getReadLockString

        public java.lang.String getReadLockString​(int timeout)
        Description copied from class: Dialect
        Get the string to append to SELECT statements to acquire READ locks for this dialect. Location of the returned string is treated the same as getForUpdateString.
        Overrides:
        getReadLockString in class Dialect
        Parameters:
        timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
        Returns:
        The appropriate LOCK clause string.

      • getReadLockString

        public java.lang.String getReadLockString​(java.lang.String aliases,
                                          int timeout)
        Description copied from class: Dialect
        Get the string to append to SELECT statements to acquire READ locks for this dialect given the aliases of the columns to be read locked. Location of the returned string is treated the same as getForUpdateString.
        Overrides:
        getReadLockString in class Dialect
        Parameters:
        aliases - The columns to be read locked.
        timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
        Returns:
        The appropriate LOCK clause string.

      • getWriteLockString

        public java.lang.String getWriteLockString​(int timeout)
        Description copied from class: Dialect
        Get the string to append to SELECT statements to acquire WRITE locks for this dialect. Location of the returned string is treated the same as getForUpdateString.
        Overrides:
        getWriteLockString in class Dialect
        Parameters:
        timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
        Returns:
        The appropriate LOCK clause string.

      • getWriteLockString

        public java.lang.String getWriteLockString​(java.lang.String aliases,
                                           int timeout)
        Description copied from class: Dialect
        Get the string to append to SELECT statements to acquire WRITE locks for this dialect given the aliases of the columns to be write locked. Location of the of the returned string is treated the same as getForUpdateString.
        Overrides:
        getWriteLockString in class Dialect
        Parameters:
        aliases - The columns to be read locked.
        timeout - in milliseconds, -1 for indefinite wait and 0 for no wait.
        Returns:
        The appropriate LOCK clause string.

      • getQueryHintString

        public java.lang.String getQueryHintString​(java.lang.String query,
                                           java.util.List<java.lang.String> hints)
        Description copied from class: Dialect
        Apply a hint to the query. The entire query is provided, allowing the Dialect full control over the placement and syntax of the hint. By default, ignore the hint and simply return the query.
        Overrides:
        getQueryHintString in class Dialect
        Parameters:
        query - The query to which to apply the hint.
        hints - The hints to apply
        Returns:
        The modified SQL

      • getTableComment

        public java.lang.String getTableComment​(java.lang.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 java.lang.String getColumnComment​(java.lang.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

      • 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

      • supportsPartitionBy

        public boolean supportsPartitionBy()
        Description copied from class: Dialect
        Does the underlying database support partition by
        Overrides:
        supportsPartitionBy in class Dialect
        Returns:
        boolean

      • contributeTypes

        public void contributeTypes​(TypeContributions typeContributions,
                            ServiceRegistry serviceRegistry)
        Description copied from class: Dialect
        Allows the Dialect to contribute additional types
        Overrides:
        contributeTypes in class Dialect
        Parameters:
        typeContributions - Callback to contribute the types
        serviceRegistry - The service registry

      • toBooleanValueString

        public java.lang.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.

      • registerResultSetOutParameter

        public int registerResultSetOutParameter​(java.sql.CallableStatement statement,
                                         int position)
                                  throws java.sql.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.
        position - The bind position at which to register the output param.
        Returns:
        The number of (contiguous) bind positions used.
        Throws:
        java.sql.SQLException - Indicates problems registering the param.

      • registerResultSetOutParameter

        public int registerResultSetOutParameter​(java.sql.CallableStatement statement,
                                         java.lang.String name)
                                  throws java.sql.SQLException
        Description copied from class: Dialect
        Registers a parameter (either OUT, or the new REF_CURSOR param type available in Java 8) capable of returning ResultSet *by name*. Pre-Java 8, registering such ResultSet-returning parameters varied greatly across database and drivers; hence its inclusion as part of the Dialect contract.
        Overrides:
        registerResultSetOutParameter in class Dialect
        Parameters:
        statement - The callable statement.
        name - The parameter name (for drivers which support named parameters).
        Returns:
        The number of (contiguous) bind positions used.
        Throws:
        java.sql.SQLException - Indicates problems registering the param.

      • supportsNoWait

        public boolean supportsNoWait()
        Description copied from class: Dialect
        Does this dialect/database support NO_WAIT timeout.
        Overrides:
        supportsNoWait in class Dialect
        Returns:
        true if NO_WAIT is supported

      • supportsJdbcConnectionLobCreation

        public boolean supportsJdbcConnectionLobCreation​(java.sql.DatabaseMetaData databaseMetaData)
        Description copied from class: Dialect
        Check whether the JDBC Connection supports creating LOBs via Connection.createBlob(), Connection.createNClob() or Connection.createClob().
        Overrides:
        supportsJdbcConnectionLobCreation in class Dialect
        Parameters:
        databaseMetaData - JDBC DatabaseMetaData which can be used if LOB creation is supported only starting from a given Driver version
        Returns:
        true if LOBs can be created via the JDBC Connection.

      • supportsNoColumnsInsert

        public boolean supportsNoColumnsInsert()
        Description copied from class: Dialect
        Check if the INSERT statement is allowed to contain no column.
        Overrides:
        supportsNoColumnsInsert in class Dialect
        Returns:
        if the Dialect supports no-column INSERT.

      • isUseUnicodeStringTypes

        public boolean isUseUnicodeStringTypes()

      • supportsAsciiStringTypes

        protected abstract boolean supportsAsciiStringTypes()

      • useUnicodeStringTypesDefault

        protected abstract java.lang.Boolean useUnicodeStringTypesDefault()