empire-db/src/main/java/org/apache/empire/dbms/derby/DBMSHandlerDerby.java [203:237]:
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            case SQL_FUNC_DAY:                return "day(?)";
            case SQL_FUNC_MONTH:              return "month(?)";
            case SQL_FUNC_YEAR:               return "year(?)";
            // Aggregation
            case SQL_FUNC_SUM:                return "sum(?)";
            case SQL_FUNC_MAX:                return "max(?)";
            case SQL_FUNC_MIN:                return "min(?)";
            case SQL_FUNC_AVG:                return "avg(?)";
            // Others
            case SQL_FUNC_DECODE:             return "case ? {0} end";
            case SQL_FUNC_DECODE_SEP:         return " ";
            case SQL_FUNC_DECODE_PART:        return "when {0} then {1}";
            case SQL_FUNC_DECODE_ELSE:        return "else {0}";
            // Not defined
            default:
                // log.warn("SQL phrase " + phrase.name() + " is not defined!");
                return phrase.getSqlDefault();
        }
    }

    /**
     * @see DBMSHandler#getConvertPhrase(DataType, DataType, Object)
     */
    @Override
    public String getConvertPhrase(DataType destType, DataType srcType, Object format)
    {
        switch(destType)
        {
           case BOOL:      return "CAST(? AS UNSIGNED)";
           case INTEGER:   return "CAST(? AS SIGNED)";
           case DECIMAL:   return "CAST(? AS DECIMAL)";
           case FLOAT:     return "CAST(? AS DECIMAL)";
           case DATE:      return "CAST(? AS DATE)";
           case TIME:      return "CAST(? AS TIME)";
           case DATETIME:
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empire-db/src/main/java/org/apache/empire/dbms/mysql/DBMSHandlerMySQL.java [1078:1112]:
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            case SQL_FUNC_DAY:                return "day(?)";
            case SQL_FUNC_MONTH:              return "month(?)";
            case SQL_FUNC_YEAR:               return "year(?)";
            // Aggregation
            case SQL_FUNC_SUM:                return "sum(?)";
            case SQL_FUNC_MAX:                return "max(?)";
            case SQL_FUNC_MIN:                return "min(?)";
            case SQL_FUNC_AVG:                return "avg(?)";
            // Others
            case SQL_FUNC_DECODE:             return "case ? {0} end";
            case SQL_FUNC_DECODE_SEP:         return " ";
            case SQL_FUNC_DECODE_PART:        return "when {0} then {1}";
            case SQL_FUNC_DECODE_ELSE:        return "else {0}";
            // Not defined
            default:
                // log.warn("SQL phrase " + phrase.name() + " is not defined!");
                return phrase.getSqlDefault();
        }
    }

    /**
     * @see DBMSHandler#getConvertPhrase(DataType, DataType, Object)
     */
    @Override
    public String getConvertPhrase(DataType destType, DataType srcType, Object format)
    {
        switch(destType)
        {
           case BOOL:      return "CAST(? AS UNSIGNED)";
           case INTEGER:   return "CAST(? AS SIGNED)";
           case DECIMAL:   return "CAST(? AS DECIMAL)";
           case FLOAT:     return "CAST(? AS DECIMAL)";
           case DATE:      return "CAST(? AS DATE)";
           case TIME:      return "CAST(? AS TIME)";
           case DATETIME:
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