public Oracle8iDialect() 
{
		super();
		registerCharacterTypeMappings();
		registerNumericTypeMappings();
		registerDateTimeTypeMappings();
		registerLargeObjectTypeMappings();
		registerReverseHibernateTypeMappings();
		registerFunctions();
		registerDefaultProperties();
}

 public boolean bindLimitParametersInReverseOrder() 
{
		return true;
}

 public CaseFragment createCaseFragment() 
{
		return new DecodeCaseFragment();
}

Map case support to the Oracle DECODE function. Oracle did not add support for CASE until 9i.

 public JoinFragment createOuterJoinFragment() 
{
		return new OracleJoinFragment();
}

Support for the oracle proprietary join syntax...

 public boolean dropConstraints() 
{
		return false;
}

 public boolean dropTemporaryTableAfterUse() 
{
		return false;
}

 public boolean forUpdateOfColumns() 
{
		return true;
}

 public String generateTemporaryTableName(String baseTableName) 
{
		String name = super.generateTemporaryTableName(baseTableName);
		return name.length()  > 30 ? name.substring( 1, 30 ) : name;
}

 public String getAddColumnString() 
{
		return "add";
}

 public String getBasicSelectClauseNullString(int sqlType) 
{
		return super.getSelectClauseNullString( sqlType );
}

Allows access to the basic Dialect#getSelectClauseNullString implementation...

 public String getCascadeConstraintsString() 
{
		return " cascade constraints";
}

 public String getCreateSequenceString(String sequenceName) 
{
		return "create sequence " + sequenceName; //starts with 1, implicitly
}

 public String getCreateTemporaryTablePostfix() 
{
		return "on commit delete rows";
}

 public String getCreateTemporaryTableString() 
{
		return "create global temporary table";
}

 public String getCurrentTimestampSQLFunctionName() 
{
		return "sysdate";
}

 public String getCurrentTimestampSelectString() 
{
		return "select sysdate from dual";
}

 public String getDropSequenceString(String sequenceName) 
{
		return "drop sequence " + sequenceName;
}

 public String getForUpdateNowaitString() 
{
		return " for update nowait";
}

 public String getForUpdateNowaitString(String aliases) 
{
		return getForUpdateString() + " of " + aliases + " nowait";
}

 public String getForUpdateString(String aliases) 
{
		return getForUpdateString() + " of " + aliases;
}

 public String getLimitString(String sql,
    boolean hasOffset) 
{
		sql = sql.trim();
		boolean isForUpdate = false;
		if ( sql.toLowerCase().endsWith(" for update") ) {
			sql = sql.substring( 0, sql.length()-11 );
			isForUpdate = true;
		}
		StringBuffer pagingSelect = new StringBuffer( sql.length()+100 );
		if (hasOffset) {
			pagingSelect.append("select * from ( select row_.*, rownum rownum_ from ( ");
		}
		else {
			pagingSelect.append("select * from ( ");
		}
		pagingSelect.append(sql);
		if (hasOffset) {
			pagingSelect.append(" ) row_ ) where rownum_ < = ? and rownum_  > ?");
		}
		else {
			pagingSelect.append(" ) where rownum < = ?");
		}
		if ( isForUpdate ) {
			pagingSelect.append( " for update" );
		}
		return pagingSelect.toString();
}

 public String getQuerySequencesString() 
{
		return    " select sequence_name from all_sequences"
				+ "  union"
				+ " select synonym_name"
				+ "   from all_synonyms us, all_sequences asq"
				+ "  where asq.sequence_name = us.table_name"
				+ "    and asq.sequence_owner = us.table_owner";
}

 public ResultSet getResultSet(CallableStatement ps) throws SQLException 
{
		ps.execute();
		return ( ResultSet ) ps.getObject( 1 );
}

 public String getSelectClauseNullString(int sqlType) 
{
		switch(sqlType) {
			case Types.VARCHAR:
			case Types.CHAR:
				return "to_char(null)";
			case Types.DATE:
			case Types.TIMESTAMP:
			case Types.TIME:
				return "to_date(null)";
			default:
				return "to_number(null)";
		}
}

 public String getSelectGUIDString() 
{
		return "select rawtohex(sys_guid()) from dual";
}

 public String getSelectSequenceNextValString(String sequenceName) 
{
		return sequenceName + ".nextval";
}

 public String getSequenceNextValString(String sequenceName) 
{
		return "select " + getSelectSequenceNextValString( sequenceName ) + " from dual";
}

 public ViolatedConstraintNameExtracter getViolatedConstraintNameExtracter() 
{
        return EXTRACTER;
}

 public boolean isCurrentTimestampSelectStringCallable() 
{
		return false;
}

 protected  void registerCharacterTypeMappings() 
{
		registerColumnType( Types.CHAR, "char(1)" );
		registerColumnType( Types.VARCHAR, 4000, "varchar2($l)" );
		registerColumnType( Types.VARCHAR, "long" );
}

 protected  void registerDateTimeTypeMappings() 
{
		registerColumnType( Types.DATE, "date" );
		registerColumnType( Types.TIME, "date" );
		registerColumnType( Types.TIMESTAMP, "date" );
}

 protected  void registerDefaultProperties() 
{
		getDefaultProperties().setProperty( Environment.USE_STREAMS_FOR_BINARY, "true" );
		getDefaultProperties().setProperty( Environment.STATEMENT_BATCH_SIZE, DEFAULT_BATCH_SIZE );
		// Oracle driver reports to support getGeneratedKeys(), but they only
		// support the version taking an array of the names of the columns to
		// be returned (via its RETURNING clause).  No other driver seems to
		// support this overloaded version.
		getDefaultProperties().setProperty( Environment.USE_GET_GENERATED_KEYS, "false" );
}

 protected  void registerFunctions() 
{
		registerFunction( "abs", new StandardSQLFunction("abs") );
		registerFunction( "sign", new StandardSQLFunction("sign", Hibernate.INTEGER) );
		registerFunction( "acos", new StandardSQLFunction("acos", Hibernate.DOUBLE) );
		registerFunction( "asin", new StandardSQLFunction("asin", Hibernate.DOUBLE) );
		registerFunction( "atan", new StandardSQLFunction("atan", Hibernate.DOUBLE) );
		registerFunction( "cos", new StandardSQLFunction("cos", Hibernate.DOUBLE) );
		registerFunction( "cosh", new StandardSQLFunction("cosh", Hibernate.DOUBLE) );
		registerFunction( "exp", new StandardSQLFunction("exp", Hibernate.DOUBLE) );
		registerFunction( "ln", new StandardSQLFunction("ln", Hibernate.DOUBLE) );
		registerFunction( "sin", new StandardSQLFunction("sin", Hibernate.DOUBLE) );
		registerFunction( "sinh", new StandardSQLFunction("sinh", Hibernate.DOUBLE) );
		registerFunction( "stddev", new StandardSQLFunction("stddev", Hibernate.DOUBLE) );
		registerFunction( "sqrt", new StandardSQLFunction("sqrt", Hibernate.DOUBLE) );
		registerFunction( "tan", new StandardSQLFunction("tan", Hibernate.DOUBLE) );
		registerFunction( "tanh", new StandardSQLFunction("tanh", Hibernate.DOUBLE) );
		registerFunction( "variance", new StandardSQLFunction("variance", Hibernate.DOUBLE) );
		registerFunction( "round", new StandardSQLFunction("round") );
		registerFunction( "trunc", new StandardSQLFunction("trunc") );
		registerFunction( "ceil", new StandardSQLFunction("ceil") );
		registerFunction( "floor", new StandardSQLFunction("floor") );
		registerFunction( "chr", new StandardSQLFunction("chr", Hibernate.CHARACTER) );
		registerFunction( "initcap", new StandardSQLFunction("initcap") );
		registerFunction( "lower", new StandardSQLFunction("lower") );
		registerFunction( "ltrim", new StandardSQLFunction("ltrim") );
		registerFunction( "rtrim", new StandardSQLFunction("rtrim") );
		registerFunction( "soundex", new StandardSQLFunction("soundex") );
		registerFunction( "upper", new StandardSQLFunction("upper") );
		registerFunction( "ascii", new StandardSQLFunction("ascii", Hibernate.INTEGER) );
		registerFunction( "length", new StandardSQLFunction("length", Hibernate.LONG) );
		registerFunction( "to_char", new StandardSQLFunction("to_char", Hibernate.STRING) );
		registerFunction( "to_date", new StandardSQLFunction("to_date", Hibernate.TIMESTAMP) );
		registerFunction( "current_date", new NoArgSQLFunction("current_date", Hibernate.DATE, false) );
		registerFunction( "current_time", new NoArgSQLFunction("current_timestamp", Hibernate.TIME, false) );
		registerFunction( "current_timestamp", new NoArgSQLFunction("current_timestamp", Hibernate.TIMESTAMP, false) );
		registerFunction( "last_day", new StandardSQLFunction("last_day", Hibernate.DATE) );
		registerFunction( "sysdate", new NoArgSQLFunction("sysdate", Hibernate.DATE, false) );
		registerFunction( "systimestamp", new NoArgSQLFunction("systimestamp", Hibernate.TIMESTAMP, false) );
		registerFunction( "uid", new NoArgSQLFunction("uid", Hibernate.INTEGER, false) );
		registerFunction( "user", new NoArgSQLFunction("user", Hibernate.STRING, false) );
		registerFunction( "rowid", new NoArgSQLFunction("rowid", Hibernate.LONG, false) );
		registerFunction( "rownum", new NoArgSQLFunction("rownum", Hibernate.LONG, false) );
		// Multi-param string dialect functions...
		registerFunction( "concat", new VarArgsSQLFunction(Hibernate.STRING, "", "||", "") );
		registerFunction( "instr", new StandardSQLFunction("instr", Hibernate.INTEGER) );
		registerFunction( "instrb", new StandardSQLFunction("instrb", Hibernate.INTEGER) );
		registerFunction( "lpad", new StandardSQLFunction("lpad", Hibernate.STRING) );
		registerFunction( "replace", new StandardSQLFunction("replace", Hibernate.STRING) );
		registerFunction( "rpad", new StandardSQLFunction("rpad", Hibernate.STRING) );
		registerFunction( "substr", new StandardSQLFunction("substr", Hibernate.STRING) );
		registerFunction( "substrb", new StandardSQLFunction("substrb", Hibernate.STRING) );
		registerFunction( "translate", new StandardSQLFunction("translate", Hibernate.STRING) );
		registerFunction( "substring", new StandardSQLFunction( "substr", Hibernate.STRING ) );
		registerFunction( "locate", new SQLFunctionTemplate( Hibernate.INTEGER, "instr(?2,?1)" ) );
		registerFunction( "bit_length", new SQLFunctionTemplate( Hibernate.INTEGER, "vsize(?1)*8" ) );
		registerFunction( "coalesce", new NvlFunction() );
		// Multi-param numeric dialect functions...
		registerFunction( "atan2", new StandardSQLFunction("atan2", Hibernate.FLOAT) );
		registerFunction( "log", new StandardSQLFunction("log", Hibernate.INTEGER) );
		registerFunction( "mod", new StandardSQLFunction("mod", Hibernate.INTEGER) );
		registerFunction( "nvl", new StandardSQLFunction("nvl") );
		registerFunction( "nvl2", new StandardSQLFunction("nvl2") );
		registerFunction( "power", new StandardSQLFunction("power", Hibernate.FLOAT) );
		// Multi-param date dialect functions...
		registerFunction( "add_months", new StandardSQLFunction("add_months", Hibernate.DATE) );
		registerFunction( "months_between", new StandardSQLFunction("months_between", Hibernate.FLOAT) );
		registerFunction( "next_day", new StandardSQLFunction("next_day", Hibernate.DATE) );
		registerFunction( "str", new StandardSQLFunction("to_char", Hibernate.STRING) );
}

 protected  void registerLargeObjectTypeMappings() 
{
		registerColumnType( Types.VARBINARY, 2000, "raw($l)" );
		registerColumnType( Types.VARBINARY, "long raw" );
		registerColumnType( Types.BLOB, "blob" );
		registerColumnType( Types.CLOB, "clob" );
}

 protected  void registerNumericTypeMappings() 
{
		registerColumnType( Types.BIT, "number(1,0)" );
		registerColumnType( Types.BIGINT, "number(19,0)" );
		registerColumnType( Types.SMALLINT, "number(5,0)" );
		registerColumnType( Types.TINYINT, "number(3,0)" );
		registerColumnType( Types.INTEGER, "number(10,0)" );
		registerColumnType( Types.FLOAT, "float" );
		registerColumnType( Types.DOUBLE, "double precision" );
		registerColumnType( Types.NUMERIC, "number($p,$s)" );
		registerColumnType( Types.DECIMAL, "number($p,$s)" );
}

 public int registerResultSetOutParameter(CallableStatement statement,
    int col) throws SQLException 
{
	       
		if(oracletypes_cursor_value==0) {
			try {
				Class types = ReflectHelper.classForName("oracle.jdbc.driver.OracleTypes");
				oracletypes_cursor_value = types.getField("CURSOR").getInt(types.newInstance());
			} catch (Exception se) {
				throw new HibernateException("Problem while trying to load or access OracleTypes.CURSOR value",se);
			}
		}
		//	register the type of the out param - an Oracle specific type
		statement.registerOutParameter(col, oracletypes_cursor_value);
		col++;
		return col;
}

 protected  void registerReverseHibernateTypeMappings() 
{

}

 public boolean supportsCommentOn() 
{
		return true;
}

 public boolean supportsCurrentTimestampSelection() 
{
		return true;
}

 public boolean supportsEmptyInList() 
{
		return false;
}

 public boolean supportsExistsInSelect() 
{
		return false;
}

 public boolean supportsLimit() 
{
		return true;
}

 public boolean supportsPooledSequences() 
{
		return true;
}

 public boolean supportsSequences() 
{
		return true;
}

 public boolean supportsTemporaryTables() 
{
		return true;
}

 public boolean supportsUnionAll() 
{
		return true;
}

 public boolean useMaxForLimit() 
{
		return true;
}