Package org.hibernate.dialect

Class SybaseASE15Dialect

  • All Implemented Interfaces:
    ConversionContext
    Direct Known Subclasses:
    SybaseASE157Dialect
    public class SybaseASE15Dialect
extends SybaseDialect
    An SQL dialect targeting Sybase Adaptive Server Enterprise (ASE) 15 and higher.

    TODO : verify if this also works with 12/12.5

    • Constructor Detail

      • SybaseASE15Dialect

        public SybaseASE15Dialect()
        Constructs a SybaseASE15Dialect

    • Method Detail

      • 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.

      • 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.

      • areStringComparisonsCaseInsensitive

        public boolean areStringComparisonsCaseInsensitive()
        By default, Sybase string comparisons are case-insensitive.

        If the DB is configured to be case-sensitive, then this return value will be incorrect.

        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.

      • getCurrentTimestampSQLFunctionName

        public java.lang.String getCurrentTimestampSQLFunctionName()
        Description copied from class: Dialect
        The name of the database-specific SQL function for retrieving the current timestamp.
        Overrides:
        getCurrentTimestampSQLFunctionName in class Dialect
        Returns:
        The function name.

      • supportsExpectedLobUsagePattern

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

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

      • getCrossJoinSeparator

        public java.lang.String getCrossJoinSeparator()
        Description copied from class: Dialect
        Returns the separator to use for defining cross joins when translating HQL queries.

        Typically this will be either [ cross join ] or [, ]

        Note that the spaces are important!

        Overrides:
        getCrossJoinSeparator in class Dialect
        Returns:
        The cross join separator

      • 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.

      • supportsPartitionBy

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

      • 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

      • 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.
        Overrides:
        getForUpdateString in class Dialect
        Returns:
        The appropriate FOR UPDATE clause string.

      • appendLockHint

        public java.lang.String appendLockHint​(LockOptions lockOptions,
                                       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

        Overrides:
        appendLockHint in class Dialect
        Parameters:
        lockOptions - 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.

        Overrides:
        applyLocksToSql in class Dialect
        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.

      • 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