Package org.hibernate.dialect

Class SybaseASE157Dialect

  • All Implemented Interfaces:
    ConversionContext
    public class SybaseASE157Dialect
extends SybaseASE15Dialect
    An SQL dialect targeting Sybase Adaptive Server Enterprise (ASE) 15.7 and higher.

    • Constructor Detail

      • SybaseASE157Dialect

        public SybaseASE157Dialect()
        Constructs a SybaseASE157Dialect

    • Method Detail

      • supportsExpectedLobUsagePattern

        public boolean supportsExpectedLobUsagePattern()
        Description copied from class: SybaseASE15Dialect
        Actually Sybase does not support LOB locators at al.
        Overrides:
        supportsExpectedLobUsagePattern in class SybaseASE15Dialect
        Returns:
        false.

        false.

        True if normal LOB usage patterns can be used with this driver; false if driver-specific hookiness needs to be applied.

      • 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.

      • 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.

      • getForUpdateString

        public java.lang.String getForUpdateString()
        Description copied from class: Dialect
        Get the string to append to SELECT statements to acquire locks for this dialect.
        Returns:
        The appropriate FOR UPDATE clause string.

      • 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.

      • appendLockHint

        public java.lang.String appendLockHint​(LockOptions mode,
                                       java.lang.String tableName)
        Description copied from class: Dialect
        Some dialects support an alternative means to SELECT FOR UPDATE, whereby a "lock hint" is appended to the table name in the from clause.

        contributed by Helge Schulz

        Parameters:
        mode - The lock options to apply
        tableName - The name of the table to which to apply the lock hint.
        Returns:
        The table with any required lock hints.

      • applyLocksToSql

        public java.lang.String applyLocksToSql​(java.lang.String sql,
                                        LockOptions aliasedLockOptions,
                                        java.util.Map<java.lang.String,​java.lang.String[]> keyColumnNames)
        Description copied from class: Dialect
        Modifies the given SQL by applying the appropriate updates for the specified lock modes and key columns.

        The behavior here is that of an ANSI SQL SELECT FOR UPDATE. This method is really intended to allow dialects which do not support SELECT FOR UPDATE to achieve this in their own fashion.

        Parameters:
        sql - the SQL string to modify
        aliasedLockOptions - lock options indexed by aliased table names.
        keyColumnNames - a map of key columns indexed by aliased table names.
        Returns:
        the modified SQL string.

      • 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

      • 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.

      • supportsLimitOffset

        public boolean supportsLimitOffset()
        Description copied from class: Dialect
        Does this dialect's LIMIT support (if any) additionally support specifying an offset?
        Overrides:
        supportsLimitOffset in class Dialect
        Returns:
        True if the dialect supports an offset within the limit support.

      • getLimitHandler

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

      • 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.

      • 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

      • registerResultSetOutParameter

        public int registerResultSetOutParameter​(java.sql.CallableStatement statement,
                                         int col)
                                  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.
        col - 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.

      • getResultSet

        public java.sql.ResultSet getResultSet​(java.sql.CallableStatement ps)
                                throws java.sql.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:
        java.sql.SQLException - Indicates problems extracting the result set.

      • 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.

      • 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.

      • 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.

      • 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.

      • 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.

      • 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.

      • doesReadCommittedCauseWritersToBlockReaders

        public boolean doesReadCommittedCauseWritersToBlockReaders()
        Description copied from class: Dialect
        For the underlying database, is READ_COMMITTED isolation implemented by forcing readers to wait for write locks to be released?
        Overrides:
        doesReadCommittedCauseWritersToBlockReaders in class Dialect
        Returns:
        True if writers block readers to achieve READ_COMMITTED; false otherwise.

      • doesRepeatableReadCauseReadersToBlockWriters

        public boolean doesRepeatableReadCauseReadersToBlockWriters()
        Description copied from class: Dialect
        For the underlying database, is REPEATABLE_READ isolation implemented by forcing writers to wait for read locks to be released?
        Overrides:
        doesRepeatableReadCauseReadersToBlockWriters in class Dialect
        Returns:
        True if readers block writers to achieve REPEATABLE_READ; false otherwise.

      • 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.

      • supportsTuplesInSubqueries

        public boolean supportsTuplesInSubqueries()
        Description copied from class: Dialect
        Does this dialect support tuples in subqueries? Ex: delete from Table1 where (col1, col2) in (select col1, col2 from Table2)
        Overrides:
        supportsTuplesInSubqueries in class Dialect
        Returns:
        boolean